A method for driving a multiphase synchronous converter

Ein multiphasiger Synchronwandler, bestehend aus mehreren Halbbrücken, wiederum bestehend aus jeweils einem oberen Leistungsschalter und jeweils einem unteren Leistungsschalter, wird durch eine Pulsweitenmodulation abhängig von einem vorgegebenen Tastgrad im Bereich von null bis hundert Prozent angesteuert. Der multiphasige Synchronwandler erzeugt einen Ausgangsstrom und wird in einem Normalmodus betrieben, in dem die Leistungsschalter mit einer durch eine vorgegebene Normalschaltfrequenz definierte Normalschaltperiode und einer vom aktuellen Tastgrad abhängigen Normalplusdauer schalten. Sobald der Tastgrad eine obere Tastgradschwelle überschreitet oder eine untere Tastgradschwelle unterschreitet, wird der multiphasige Synchronwandler vom Normalmodus in einen Betriebsmodus geschaltet, in dem zumindest einer der Leistungsschalter zumindest einer Halbbrücke über einen Zeitraum, der größer als die Normalschaltperiode ist, permanent deaktiviert.

Operating circuit for lighting means with PFC control unit

Es wird eine Betriebsschaltung für Leuchtmittel, insbesondere zum Betrieb wenigstens einer Leuchtmittelstrecke mit wenigstens einer LED, bereitgestellt, aufweisend eine vorzugsweise integrierte Steuereinheit. Die Betriebsschaltung weist weiter eine PFC-Schaltung mit einem ausgehend von einem Ausgangssignal der Steuereinheit getakteten Schalter auf. Der Steuereinheit kann an wenigstens einem Eingang ein von einer Netzversorgungsspannung der Betriebsschaltung abgeleitetes Eingangssignal zugeführt sein. Die Steuereinheit ist dazu eingerichtet, eine Taktung des Schalters abhängig von dem Eingangssignal zu verändern. Es kann zudem eine Verarbeitungsschaltung vorgesehen sein, die einen Pegel des Eingangssignals vor seiner Zuführung an die Steuereinheit zumindest zeitweise im Bereich der Nulldurchgänge der Netzversorgungsspannung anhebt.

CONVERTISSEUR DE TENSION HAUTE FREQUENCE CONTINUE DE TYPE BUCK QUASI-RESONANT

Convertisseur de tension continue de type Buck quasi-résonant comprenant une porte d'entrée (201) ayant une première borne (202) apte à recevoir un niveau de tension à convertir, une porte de sortie (206) ayant une première borne (204) apte à fournir un niveau de tension convertie, un premier interrupteur (Qhs) connecté en série à ladite première borne de la porte d'entrée et un circuit de régulation (211) configuré pour : - générer une ondulation de tension (Ond), croissante ou décroissante en fonction d'un état de fermeture ou ouverture dudit premier interrupteur; - générer un signal de consigne (Vcons) proportionnel à une différence entre un niveau moyen de tension convertie et une tension de référence (Vref); - effectuer une première comparaison (210) entre ledit signal de consigne et ledit niveau de tension convertie (Vout) auquel a été additionné ladite ondulation de tension; et - en fonction du résultat de ladite première comparaison, générer ou pas sur sa sortie un signal d'activation ...

ELECTRICAL CIRCUIT FOR DELIVERING POWER TO CONSUMER ELECTRONIC DEVICES

An electrical circuit for providing electrical power for use in powering electronic devices is described herein. The electrical circuit includes a primary power circuit and a secondary power circuit. The primary power circuit receives an alternating current (AC) input power signal from an electrical power source and generates an intermediate direct current (DC) power signal. The intermediate DC power signal is generated at a first voltage level that is less than a voltage level of the AC input power signal. The secondary power circuit receives the intermediate DC power signal from the primary power circuit and delivers an output DC power signal to an electronic device. The output DC power signal is delivered at an output voltage level that is less than the first voltage level of the intermediate DC power signal.

MULTIPHASE CONVERTER WITH PHASE INTERLEAVING

Switch control apparatus

The present invention reduces switching noise generated in a switching control device having a switching element such as a switching power supply in linear linkage with the state of a load of the output and without increasing the control circuit scale which is a factor of cost increase. The present invention adopts a configuration of a control circuit having an ON/OFF circuit that controls the switching element such that one or both of two specified values (upper limit and lower limit) that specify triangular waves of a triangular wave generation circuit that specifies a drive oscillating frequency of the switching element is/are changed in linear linkage with the output load state.

Method for operating an inverter

A method for the operational control of an inverter (4) designed for DC/AC voltage conversion that has at least one direct-voltage input (2, 3) and that can be connected to a power supply grid via at least one alternating-voltage output (10, 11, 12), the inverter being involved in a power flow interaction with the grid in such a manner that, during operation of the inverter, a leakage current IA can occur, is characterized in that the leakage current IA is controlled in the operational control.

Welding power supply with digital control of duty cycle

Current mode step-down switching regulator

Control circuit, battery power supply apparatus and control method

Power conversion apparatus and methods using an adaptive waveform reference

ENERGY CONVERTER SWITCHING MODE CONTROL "PEAK LOAD" IMPROVED

ELECTRIC FEEDING ATTACHMENT

La présente invention concerne un dispositif d'alimentation électrique (1) avec une entrée (2) servant à raccorder le dispositif d'alimentation électrique à une alimentation réseau qui met à disposition une tension alternative d'entrée, avec une sortie (3) servant à raccorder le dispositif d'alimentation électrique (1) à un consommateur (V), la sortie mettant à disposition une tension continue de sortie, avec un redresseur (5), avec un module PFC (6) qui comprend un dispositif de lissage (8) et un dispositif actif de correction du facteur de puissance (7), le dispositif de correction du facteur de puissance (7) étant conçu pour, en fonction d'un signal de forme de courant dépendant du temps, former un courant d'alimentation dépendant du temps pour le dispositif de lissage (8) de façon qu'un courant d'entrée dépendant du temps dans le module PFC (6) soit ajusté au signal de forme de courant, le signal de forme de courant étant généré par un circuit analogique.

CONTROL METHOD IMPLEMENTED IN A POWER CONVERTER TO PROVIDE DETECTABILITY OF A SHORT CIRCUIT

L'invention concerne un procédé de commande mis en œuvre dans un convertisseur de puissance connecté à une charge électrique. Le procédé de commande vise à assurer la détectabilité d'un court-circuit entre les phases de sortie du convertisseur de puissance lors du démarrage de la charge électrique ou à faible fréquence de sortie. Pour cela, le procédé consiste à appliquer une correction à l'impulsion de tension destinée à la charge électrique en vue d'obtenir une impulsion de tension corrigée (P1, P2), ladite impulsion de tension corrigée (P1, P2) étant d'une durée supérieure une valeur seuil (WTH) de détectabilité d'un court circuit entre les deux phases de sortie (1, 2).

Power supply circuit e.g. flyback switching mode power supply circuit, for supplying power to modules of e.g. electric household appliance, has regulation unit for maintaining value of output power supply signal at predetermined value

Un circuit d'alimentation (1) d'un appareil électrique délivrant en sortie un premier signal d'alimentation (VOUT1) à une première valeur nominale et un second signal d'alimentation (VOUT2) à une seconde valeur nominale, et comportant : - des premiers moyens de régulation (5) adaptés à maintenir la valeur dudit premier signal d'alimentation (VOUT1) en sortie à ladite première valeur nominale, et - des seconds moyens de régulation (7) adaptés à délivrer ledit second signal d'alimentation (VOUT2) en sortie à partir dudit premier signal d'alimentation en sortie ; ledit circuit d'alimentation (1) étant caractérisé en ce que lesdits premiers moyens de régulation (5) sont aptes à maintenir la valeur dudit premier signal d'alimentation (VOUT1) à une valeur prédéterminée étant inférieure à la première valeur nominale, lorsqu'un signal de contrôle (VC) en entrée des premiers moyens de régulation (5) présente une valeur prédéfinie.

ENERGY CONVERTER SWITCHING MODE CONTROL "PEAK LOAD" IMPROVED

Ce convertisseur (110) comporte un interrupteur (S1) et un dispositif de contrôle (120) en mode « charge crête » de génération d'une commande (SC1) de l'interrupteur (S1), et qui comporte : un correcteur d'erreur (22) entre une tension de sortie (Vout) et une tension de consigne (Vcons) ; un moyen de comparaison (24, 28) entre une consigne de charge (Qcons) et une charge mesurée (Qmes) résultant de l'intégration du courant (IL) circulant dans l'interrupteur (S1) pour élaborer le signal de commande (SC1). Le signal d'erreur en sortie du correcteur d'erreur étant une consigne de puissance (Pcons), le dispositif de contrôle (120) comporte une unité de transformation (130) comportant un diviseur (132, 232) de la consigne de puissance (Pcons) par la tension d'entrée (Vin) pour obtenir la consigne de charge (Qcons).

POWER SUPPLY DEVICE AND IMAGE FORMING APPARATUS

... 전원 장치는 변압기, 변압기의 일차측을 구동하기 위한 스위칭 유닛, 일차측에 흐르는 전류에 대응하는 출력을 검출하는 검출 유닛, 이차측으로부터의 출력 전압을 일차측에 전달하는 전달 유닛, 전달 유닛으로부터의 출력에 따라 스위칭 유닛의 동작을 제어하는 제어 유닛을 포함하고, 스위칭 유닛을 구동하기 위한 스위칭 주파수가 변압기의 공진 주파수를 포함한 미리 정해진 주파수 범위 내일 경우에, 제어 유닛은 검출 유닛으로부터의 출력에 따라 스위칭 유닛의 턴 온 시간을 단축하도록 스위칭 유닛을 제어한다.

POWER CONVERTER, CONTROL DEVICE, AND CONTROL METHOD OF POWER CONVERTER

A power converter is provided. The power converter includes a power conversion unit which outputs a voltage to a load and a control unit which outputs a PWM signal generated according to a voltage command to the power conversion unit. The power converter includes a plurality of switching elements which are driven based on the PWM signal. The control unit generates the PWM signal to control a first period in which a zero voltage is output and a second period in which a non-zero voltage is output according to a voltage command. The control unit outputs the PWM signal set to form one first period and one or more second periods within the update period of the voltage command, to the power converter. COPYRIGHT KIPO 2016 (A1,A2) Peak (B1,B2) Bottom (CC) Carrier signal (DD) PWM pulse ...

멀티-페이즈 스위칭 전력 변환기들의 평균 전류 모드 제어

... 예시적인 실시예들은 스위칭 전력 변환기들에 관한 것이다. 스위칭 전력 변환기는 평균 전류 모드 제어를 위해 구성되는 복수의 제어 유닛들을 포함하며, 여기서, 복수의 제어 유닛들의 각각의 제어 유닛은 전용 비례 제어 유닛을 포함할 수 있다. 스위칭 전력 변환기는, 복수의 제어 유닛의 각각의 제어 유닛에 커플링되고 그리고 각각의 제어 유닛에 신호를 전달하도록 구성되는 적분기를 더 포함할 수 있다.

RAMP CONTROLLED DRIVER FOR SERIES/PARALLEL SOLID STATE LIGHTING DEVICES

An electronic OLED driver apparatus is presented, which includes a DC-DC converter stage with a waveform generator generating converter setpoints with profiles having minimum rise time and fall time values.

METHOD AND APPARATUS FOR CUSTOMIZING OF A POWER SUPPLY BASED ON LOAD CHARACTERISTIC DATA

A power supply for powering an electrical load, the electrical load generating load characteristic data that determines a power supply characteristic to be provided to the electrical load from the power supply, the power supply comprising a voltage regulator for generating an output voltage to be provided as the input voltage for powering the electrical load, the voltage regulator being responsive to a reference signal for setting a characteristic of the power supply, and a control circuit for generating the reference signal for the regulator, the control circuit being responsive to the load characteristic data from the electrical load and to a selection input for selecting the type of electrical load from a plurality of electrical load types, whereby the selection input determines the type of electrical load to enable the load characteristic data to be evaluated by the control circuit to generate the reference signal for the regulator.

POWER FACTOR CORRECTOR WITH HIGH POWER FACTOR AT LOW LOAD OR HIGH MAINS VOLTAGE CONDITIONS

A power factor corrector raises power factor at low loads or high mains voltages by modifying the switch timing or the current received by the power converter. It achieves this by increasing the switch -on time of a control switch during the falling time so that the majority of the switch -on time during a mains period occurs during the falling time, to thereby control the current received by the converter to compensate for current received by the intermediate filter. Some embodiments may employ a feedback system to produce one or more error signals that modify the control signal used to control the operation of the converter. Various embodiments may also include additional stages that limit the compensation range of the error signal.

FREQUENCY REGULATED HYSTERETIC AVERAGE CURRENT MODE CONVERTER

A switch mode power converter (76) that precisely controls average switching current and operating frequency. The switching control operative in hysteretic average current mode control provides wide bandwidth operation without the need for slope correction. The switching converter ripple current is varied by a frequency comparator (78) in response to a comparison of the switching frequency to a reference frequency. The ripple current is adjusted to obtain correlation between the operating switching frequency and the reference frequency. Peak current levels are precisely controlled and may be limited to prevent component stress levels from being exceeded. Current levels are continuously monitored with a current sense amplifier (14), or monitored with a high-gain low energy current sampler. Feedback loop independent line and load regulation is provided by continuous current monitoring, or by using variable slope charge and transfer voltage to pulse width converters when operating with a current ...

VOLTAGE CONVERTER

This disclosure provides systems, methods and apparatus for voltage conversion. In one aspect, a voltage converter includes a first feedback loop monitoring one of two converter outputs of opposite polarity. The converter may further include a second feedback loop for monitoring a weighted sum of the two converter outputs of opposite polarity. In another aspect, a voltage converter may include level shifters for driving switches coupled to a boost inductor. The voltage converter may switch at least one voltage rail coupled to the level shifters from a first voltage level to a second voltage level.

Step-down switching regulator

A step-down switching regulator is disclosed that includes a first switching element, a smoothing circuit part including an inductor and a second switching element for synchronous rectification, a switching controller circuit part, and a reverse current detector circuit part that detects a reverse current flowing from the inductor to the second switching element and interrupts the reverse current by causing the switching controller circuit part to turn off the second switching element upon detection of the reverse current. Detecting a change in a set voltage, the reverse current detector circuit part stops, for a predetermined period of time, the operation of causing the switching controller circuit part to turn off the second switching element due to detection of the reverse current, and after the predetermined period of time is over, causes the switching controller circuit part to turn off the second switching element upon detection of the reverse current.

DC-DC switching regulator with switching rate control

A DC--DC switching regulator which converts a supplied DC voltage VDD to a DC output voltage VOUT for driving a load using a DC--DC buck converter operated with fixed-width pulses VX at an instantaneous switching rate ni. The regulator has a feedback for computing a subsequent switching rate ni+1 based on the instantaneous switching rate ni, an output frequency fOUT derived from output voltage VOUT by a ring oscillator and a desired frequency fDES provided by a frequency signaling device or a frequency signaling port of the load. By altering the desired frequency fDES the load communicates its power needs. The regulator can be used in the low-power regime and at high power levels.

SWITCHING POWER CIRCUIT

A switching power circuit for charging a battery can include: four switches extending between two ports of a low-frequency AC input voltage and an energy storage circuit, where the energy storage circuit and a primary winding of a transformer are coupled between first and second nodes, the first node is a common node of the first and second switches, and the second node is a common node of the third and fourth switches; a rectification circuit having an input terminal coupled to a secondary winding of the transformer; a DC-DC converter having an input terminal coupled to an output terminal of the rectification circuit, and generates a charging current; and a control circuit that adjusts the charging current by controlling an operation of the DC-DC converter according to a charging requirement, in order to make an average value of the charging current meet the charging requirement.

LOAD TRANSIENT CONTROL FOR SWITCHED MODE CONVERTER

This disclosure describes techniques to control switching operations of a switching regulator. The disclosure includes a system comprising a switching regulator configured to use an inductor to generate an output voltage signal from a. pulse-width-modulated (PWM) signal by controlling one or more switches of the switching regulator that vary charging operations of the inductor; transient handling circuitry coupled to receive a feedback voltage based on the output voltage signal and configured to generate first and second current signals that represent a difference between the feedback voltage and a reference voltage; and control circuitry configured to generate the PWM signal based on the first and second current signals such that the first current signal changes a frequency of an oscillator used to generate the PWM signal and the second current signal changes a bandwidth of a feedback loop associated with the switching regulator.

A switching circuit

A switching circuit (400) comprising an inductive component (406) including at least one winding; and a switch (404) is configured to transfer power from a voltage source (402) to the inductive component (406) in accordance with a switch control signal (412). The switching circuit (400) also comprises a controller (408) configured to integrate the voltage across the inductive component (406) in order to generate a signal representative of magnetic flux in the inductive component (406); and use the signal representative of the magnetic flux in the inductive component to account for a peak magnetization current value in order to control the switch (404).

モータ制御システム、制御装置及び制御方法

TRANSITION MODE FLYBACK CONVERTER AND PROCEDURE FOR ITS ENTERPRISE

SELFRECIPROCATING STATIC FREQUENCY CHANGER

SWITCHING TRANSDUCER

Lamp operating device

Die Erfindung betrifft ein Betriebsgerät zum dimmbaren Betrieb von Leuchtmitteln (1), insbesondere einer oder mehrere LED(s), aufweisend eine Steuerschaltung, die eine Konverterschaltung mit einem Energiespeicherelement (4) und wenigstens einem Schalter (2) aufweist, der ausgehend von der Steuerschaltung angesteuert ist. Dabei ist die Steuerschaltung dazu ausgelegt, durch Ansteuerung des Schalters (2) die Konverterschaltung wahlweise wenigstens im kritischen Modus oder im Modus mit lückendem Strombetrieb zu betreiben. Im lückenden Betrieb wird der Wiedereinschaltzeitpunkt in diskreten Inkrementen in den Bereich eines steigenden Nulldurchgangs des Stroms durch das Speicherelements gesetzt. Die Steuerschaltung ist dabei dazu ausgelegt, bei einer inkrementellen Veränderung des Wiedereinschaltzeitpunkts eine Regelung eines die Leuchtmittel-Leistung beeinflussenden Parameters durch direkte oder indirekte Veränderung der der Einschaltzeitdauer des Schalters (2) vorzunehmen.

DIRECT CURRENT/CDIRECT CURRENT CONVERTER AND PROCEDURE FOR THE ENTERPRISE A DIRECT CURRENT/CDIRECT CURRENT OF A CONVERTER

Step-up device and converter device

A step-up device (22), provided with: a shunt resistor (31) having one end connected to a low-potential-side common bus (51); and a plurality of step-up circuits (32-1 to 32-m) connected in parallel to each other, the step-up circuits (32-1 to 32-m) being connected between the other end of the shunt resistor (31) and a high-potential-side input bus (52). This step-up device (22) makes it possible to minimize cost and installation area.

Control device for direct power converter

The present invention suppresses a voltage fluctuation across the ends of a buffer capacitor of a power buffer circuit of a direct power converter in the event of a fluctuation in the electrostatic capacitance of the buffer capacitor. This control device (10) is provided with a charge control unit (103). The charge control unit (103) has an amplitude determination part (103a), a charge command generation part (103b), and charge operation control part (103c). The amplitude determination part (103a) performs at least proportional integral control with respect to the deviation (∆Vc) between an average voltage command value (Vc*), that is, a command for the average value of voltage (Vc) across the ends of the buffer capacitor, and the voltage (Vc) across the ends, and determines the amplitude (Im) of an input current to the converter. The charge command generation part (103b) multiplies the amplitude (Im) by a function (F (θ)) that is determined in accordance with a discharge duty cycle (dc ...

ELECTRICAL CIRCUIT FOR DELIVERING POWER TO CONSUMER ELECTRONIC DEVICES

ELECTRICAL CIRCUIT FOR DELIVERING POWER TO CONSUMER ELECTRONIC DEVICES An electrical circuit for providing electrical power for use in powering electronic devices is described herein. The electrical circuit includes a primary power circuit and a secondary power circuit. The primary power circuit receives an alternating current (AC) input power signal from an electrical power source and generates an intermediate direct current (DC) power signal. The intermediate DC power signal is generated at a first voltage level that is less than a voltage level of the AC input power signal. The secondary power circuit receives the intermediate DC power signal from the primary power circuit and delivers an output DC power signal to an electronic device. The output DC power signal is delivered at an output voltage level that is less than the first voltage level of the intermediate DC power signal.

METHOD IN A CASCADED TWO-LEVEL CONVERTER, CONTROL DEVICE AND COMPUTER PROGRAM PRODUCTS

The invention relates to a method (20) for providing a switching order signal to a cell (2 1..., 2n) of a cascaded two-level converter (1). The (2 1..., 2n) comprises a capacitor parallel-connected with two series-connected semiconductor devices (3a, 3b). The cascaded two-level converter comprises two or more of the cells cascade connected and arranged in a phase, divided into two phase arms (7, 8), between a first pole (4a) and a second pole (4b) of a direct voltage side. The method (20) is characterized by the steps of : measuring (21) voltages of the capacitor of the cell; calculating (22) a compensated voltage reference based on a voltage reference and the measured voltages of the capacitors, wherein the voltage reference corresponds to a desired ac current to be output on an ac-side; using the compensated voltage reference (r) to calculate a switching order signal, and providing the switching order signal to the cells (2 1..., 2n).

MODULAR STATIC CONVERTERS WITH PARALLEL OR SERIES ARCHITECTURE AND DECENTRALIZED MODULAR CONTROL

Un convertisseur statique à architecture parallèle (502) ou série comprend une pluralité de cellules de commutation (22, 24, 26, 28, 30), agencées en parallèle ou en série, et contrôlées de manière décentralisée par des modules de contrôle associés (522, 524, 526, 528, 430), chaînés suivant une boucle par un série de liaisons de communication. Chaque module de contrôle (526) comprend une unité locale unique et différente de génération de la porteuse triangulaire (156) du module qui contrôle le positionnement de sa phase d'entrelacement en fonction seulement des signaux des porteuses triangulaires des deux modules adjacents (524, 528). Chaque module de contrôle (526) comprend, dans le cas d'une architecture parallèle une unité locale (266) d'équilibrage des courants de branches et/ou une unité de régulation interne de la tension de sortie de type AVP (536), et dans le cas d'une architecture série une unité locale d'équilibrage des tensions cellule et/ou une unité de régulation interne du ...

METHOD OF CURRENT LIMITING FOR RELOADING FOR VOLTAGE CONVERTER

Control circuit of conversion circuit

The invention provides a control circuit of a conversion circuit, which is used for controlling the switching circuit to convert electric power of an input power supply into an output voltage, and a feedback signal is generated by a voltage detection circuit according to the output voltage. The control circuit of the conversion circuit comprises a reference voltage generation circuit, a reference voltage adjustment circuit, a feedback circuit and a drive circuit, wherein the reference voltage generation circuit is used for generating a reference voltage; the reference voltage adjustment circuit is used for adjusting the reference voltage so as to generate an adjusted reference voltage; the feedback circuit is used for generating a feedback control signal according to the adjusted reference voltage and the feedback signal; and the drive circuit is used for generating at least one control signal according to the feedback signal so as to control the conversion circuit.

Power conversion system and voltage detection device therefor

The present invention provides a power conversion system and a voltage detection device therefor. The voltage (Edc) of a detection subject is divided and detected by means of a voltage-dividing circuit (30) wherein multiple resistance circuits (31), each of which is formed by parallel-connecting multiple resistors, are connected in series. The output from multiple voltage detection circuits, which are formed for example from an op-amp (38) connected to any three locations in the voltage-dividing circuit (30) (with one of the locations being connected through a switch SW(35)), is input to a CPU (37) twice, that is when the switch SW(35) turns on and when the switch turns off. On the basis of these two voltage measurements, the CPU (37) determines that some kind of fault has occurred when there is a fault such as a short circuit/disconnection of the resistors in the resistance circuits (31) associated with the aforementioned three connected locations in the voltage-dividing circuit (30).

Current detection circuit and current type switch adjustor

The present invention provides a current sensing circuit consisting entirely of CMOS, and is capable of simplifying the process and depressing chip die sizes compared with the prior art.For the current sensing circuit according to the present invention, corresponding to the current sensing circuit in which the coil current generates sensing electric voltage to amend lean compensatory electric voltage, the electric current mode switch regulator is provided with a first P channel transistor with 1/N current flowing over drive coils, a second P channel transistor, a third P channel transistor, an electric voltage mirror-image circuit and an N channel transistor, wherein, the source cathode and the grids of the first P channel transistor are respectively connected with the electric source andearthy, the source cathode of the second P channel transistor is connected to the drain of the first P channel transistor, the third P channel transistor is connected with the drain of the transistorflowing ...

Power supply apparatus

DC-DC converter and power supply device

DC-DC converter

Single zero compensator

Energy saving discontinuous mode system

Controller for controlling converter, method and converting circuit

Pre-biased circuit for synchronous rectified power converters

The present invention relates to voltage converters and especially to a control circuit with an input from the voltage converter output and arranged to control the voltage level on the voltage converter output. The problem addressed relates to the situation when there is a pre-bias voltage on the converter output at the moment it is switched on. The object of the control circuit is to increase the voltage on the converter output fast and avoiding any drain of voltage or current from the output at the start up sequence. This is performed by a comparator in the control circuit that is arranged to compare the reference voltage with a division of the output voltage and if the reference voltage is lower that the divided output voltage the reference voltage is increased at the comparator output. The comparator circuit includes an OP-amplifier.

Power amplification control system of single-phase alternating-current signals

DC-DC conversion controller

Voltage converter compensation device and method

Universal power adapter/converter

A universal power adapter is provided with an input for receiving an input voltage from a power supply and an output with an output voltage selected from two or more setting voltages. A voltage converter circuit undergoes conversion among the input voltage and the two or more than two setting voltages. One of the two or more than two setting voltages is connected with the output by a coupler contact which is connected with the output.

Switching power supply device

Control circuit and method for controlling switch power supply by the control circuit

In a control circuit for powering up a switching power supply into a powered output bus, the control circuit is built such that before a turning-on of the switching power supply the controller reference is the slave that follows the bus voltage which is the master. At the moment when the converter is turned on, the master/slave relationship changes such that after the turning-on of the switching power supply the output voltage of the switching power supply is the slave that follows the controller reference. Hence, the status of the output level is memorized by the voltage loop prior to start-up of the converter such that the conflict between the soft-starting voltage loop of the converter and the pre-biased output is minimized.

Adder and current type switch adjustor

SWITCHING POWER CONVERTER WITH STATIC BIAS REDUCTION INTRODUCED BY A STABILIZATION RAMP

METHOD AND APPARATUS FOR CHARGING A MOTOR VEHICLE BATTERY AS A FUNCTION OF THE IMPEDANCE OF THE POWER SUPPLY AND MOTOR VEHICLE WITH SUCH A CHARGING APPARATUS

WAVE ENERGY CONVERTER WITH REDUCTION OF STATIC BIAS INTRODUCED BY A STABILIZATION RAMP

Ce convertisseur comporte un interrupteur commandable (M) et un dispositif de contrôle (311) de génération d'un signal de contrôle des instants d'ouverture et de fermeture de l'interrupteur commutateur, ledit dispositif de contrôle étant du type dispositif de contrôle en mode courant nécessitant la mise en œuvre d'un signal de stabilisation en courant. Le dispositif de contrôle comporte : - un composant (20) délivrant un signal de stabilisation (RC) par intermittence, en appliquant ledit signal de stabilisation (RC) à un instant prédéterminé qui précède un instant de référence ; et - un moyen de comparaison (28) de génération d'un signal de contrôle (CM) de l'interrupteur commandable (M) à partir de la comparaison d'un signal de consigne (ÎL) et d'un signal de mesure correspondant au courant (IL) circulant dans une impédance (L) du convertisseur, le signal de stabilisation intermittent (RC) étant soustrait au signal de consigne (ÎL) ou ajouté au signal de mesure avant application au moyen ...

METHOD AND APPARATUS FOR CHARGING A MOTOR VEHICLE BATTERY AS A FUNCTION OF THE IMPEDANCE OF THE POWER SUPPLY AND MOTOR VEHICLE WITH SUCH A CHARGING APPARATUS

Selon ce procédé, on filtre le courant délivré par un réseau d'alimentation électrique et l'on amène la puissance électrique du réseau à la batterie (B) via un étage abaisseur de tension (3) et un étage élévateur de tension (4) tout en pilotant les rapports cycliques de hachage desdits étages abaisseur et élévateur de tension. En outre, on compense les harmoniques en utilisant un étage d'amplification à gain variable. Par ailleurs, on détermine l'impédance du réseau d'alimentation et l'on adapte le gain variable en fonction de l'impédance du réseau.

POWER CONVERTER AND ASSOCIATED ELECTRICAL NETWORK

Convertisseur de puissance caractérisé en ce qu'il comprend une structure de puissance (11) recevant en entrée une tension alternative comprenant au moins une phase et fournissant en sortie une tension continue (Vs), ladite structure de puissance (11) étant régulée en puissance de sortie par un multiplieur (15) recevant en entrée un signal de commande en courant (l_commande) et un signal proportionnel à la tension de sortie de la structure de puissance (11), ledit signal de commande en courant (l_commande) étant généré par un module de correction de courant (14) recevant en entrée un signal proportionnel à la différence entre le courant de sortie de la structure de puissance (11) et un signal de consigne de courant (l_consigne). Réseau électrique caractérisé en ce qu'il comprend un tel circuit de conversion d'énergie.

SYSTEM MICRO-HYBRIDE DESIGNED TO FEED an ELECTRIC DISTRIBUTION NETWORK Of a MOTOR VEHICLE.

L'invention concerne un système micro-hybride (1) pour véhicule automobile comportant une machine électrique tournante (2), au moins un convertisseur de puissance (3) apte à être connecté à un réseau de distribution électrique (7) du véhicule, ce réseau (7) comportant une unité de stockage d'énergie (8), et un circuit de commande (4) apte à commander le convertisseur de puissance (3) pour fournir un courant d'alimentation au réseau de distribution électrique (7). Le système (1) comporte un moyen (5) associé au circuit de commande (4) pour commander, lors d'un changement d'état entre des états de fourniture et de non fourniture du courant d'alimentation au réseau de distribution électrique (7), une variation au moins partiellement progressive d'une tension de charge délivrée par le convertisseur de puissance (3) de manière à obtenir une variation correspondante d'une tension réseau du réseau de distribution électrique (7) d'une première valeur de tension réseau vers une seconde valeur de ...

HYSTERESIS CONTROL FOR STEP-DOWN DC/DC CONVERTER

DC/AC CONVERTING APPARATUS, CONTROLLER IC THEREOF, AND ELECTRONIC DEVICE USING THAT DC/AC CONVERTING APPARATUS

An inverter wherein a semiconductor switch circuit provided to a primary winding of a transformer having its secondary winding connected to a load is controlled by use of PWM control or the like, and wherein the current and voltage supplied to a load such as CCFL or the like are fed back to form respective current and voltage error signals, and a feedback signal is produced based on the magnitudes of those error signals. Additionally, in order to reduce the power to be supplied to the load when the DC power supply voltage abruptly increases, the feedback signal (FB) is directly changed without waiting for a change of the current and voltage to be supplied to the load. This suppresses occurrence of an unnatural display status and/or an excessive current due to an abrupt change of the power supply voltage (abrupt increase or decrease), and further prevents occurrence of shutdown of the inverter operation and the like. © KIPO & WIPO 2007 ...

POWER SUPPLY APPARATUS AND TESTING APPARATUS USING THE SAME

SWITCHING REGULATOR FOR DYNAMICALLY CHANGING OUTPUT VOLTAGE AND POWER SUPPLY CIRCUIT INCLUDING THE SAME

SYSTEM AND METHOD FOR PROVIDING VOLTAGE REGULATION IN A MULTI-VOLTAGE POWER SYSTEM

A voltage regulator system is disclosed for use in selectively regulating a voltage source at a first output voltage potential and a second output voltage potential. The voltage regulator system includes a reference unit, a filter unit and a current source unit. The reference unit is for receiving a voltage reference input signal that is representative of a request for an output reference voltage signal to change. The filter unit is for providing a change in the output voltage over a predetermined period of time. The current source unit is for providing one of a positive or negative current source to an output node at which the output reference voltage is provided.

PWM RECTIFIER HAVING TARGET VOLTAGE CORRECTOR BY ZERO SYSTEM VOLTAGE FOR REDUCING SWITCHING LOSSES AND PREVENTING NOISE GENERATION

The invention relates to a pulse-width modulated rectifier for reducing switching losses while avoiding noise generation, a target voltage system (UR.SoII.US.SoII. UT.SoII) being formed from a voltage spatial vector (IUI, arg(U)) and a zero voltage system ( Uo, Uo, Uo) being formed therefrom by means of the angle arg (U) and a control angle φ. The voltage system (UR, US,UT) resulting from the sum of the zero voltage system (Uo, Uo, Uo) and target voltage system (UR.SoII US.Soll, UT.SoII) is fed into a pulse width modulator 2 to form the control signals (SR, SS, ST) for the power semiconductor switch. First angular regions, for which a maximum zero voltage system (UO.MAX. UO.MAX. UO.MAX) is summed, and second angular regions, for which a minimum zero voltage system (UO.MIN. UO. MIN. UO.MIN) is summed, alternate over time at a frequency high enough that a first angular region in which the voltage values of a first phase of the resulting voltage system reach their maximum value is followed ...

CONTROL CIRCUIT FOR SWITCHING POWER SUPPLY DEVICE AND SWITCHING POWER SUPPLY

Provided are a control circuit for a switching power supply device and a switching power supply which enable fluctuations due to an input voltage of a switching element at a peak current to be prevented, even if an oscillator with a function for modulating a frequency in a modulation period (idle period) to an oscillation waveform is used. A control integrated circuit (IC) (8): is connected to a switching element in which an output voltage is supplied from an AC input, and a current sensing resistor that converts a current value to a voltage; and switches the switching element on and off. The control IC (8) is composed of: an OCP comparator (45) that detects an overcurrent with respect to a load by means of the current sensing resistor; an overcurrent level setting circuit (50) that compensates for fluctuations produced by peak currents in the switching element according to the output voltage from the AC input; an oscillator (34) with a frequency modulation function, which is capable of ...

HYSTERESIS CONTROL FOR STEP-DOWN DC/DC CONVERTER

A hysteretic power converter (100) constituted of: a switched mode power supply (40); a hysteretic comparator (20), a first input (FB) of the comparator arranged to receive a feedback signal providing a representation of the output voltage of the switched mode power supply and a second input (VREF) of the comparator arranged to receive a reference voltage; a ramp capacitor (180) coupled to one of the first and second input of the comparator; a current source (140), a terminal of the current source coupled to the ramp capacitor and arranged to drive current to the ramp capacitor; and a switchable current source (150), a terminal of the switchable current source coupled to the ramp capacitor, the switchable current source (150) arranged to drive current to the ramp capacitor in a direction opposite the current driven by the current source (140), wherein the switchable current source is alternately enabled and disabled responsive to the output of the hysteretic comparator (20).

METHOD FOR NEGATIVE FEEDBACK CONTROLLING ELECTRICAL POWER AND NEGATIVE FEEDBACK CONTROLLED POWER SUPPLY

Negative feedback control of a power supply is improved with respect to accuracy of control in that the controlled value is monitored by parallel analog to digital conversion. Additionally, within the negative feedback control loop adjustment of the controlled value to follow a rated value is performed by pulse-width modulation. So as not to be bound with respect to accuracy of adjustment by pulse-width modulation to a minimum pulse-width adjustment increment, fine adjustment is additionally done by superimposing to the pulse-width modulation a pulse-frequency modulated signal.

Adaptive slope compensator for current mode power converters

A circuit of an adaptive slope compensator prevents instability in the current mode converter operating under a continuous mode. A timing capacitor, charged by a programmable current source, is used to generate a slope signal. The timing capacitor is discharged by a switching signal via a switching diode connection. The programmable current source is implemented by a transistor and three bias resistors. A voltage feedback signal of the converter is taken as an input to the programmable current source to control the slew rate and magnitude of the slope signal in response to the variations of the input voltage and the output power of the converter. The slope signal is added to a sensed current loop of the converter through an output diode and a resistor in series for providing necessary slope compensation.

Level programmable power supply for communication assembly and method

A switching power supply subsystem can function as a low-power, high-efficiency communications device with performance characteristics suited to a range of applications. Properties such as maximum data rate, output swing, and drive capability are selectable to suit specific applications.

Power converter apparatus and method with output current sensing and compensation for current limit/current share operation

A power converter provides current limit/current share functionality, allowing use in a point-of-load architecture and/or in parallel with one or more other power converters. An inner current control loop may sense output current over only a portion of a duty cycle, for example at a low side active switch. The resulting signal is compensated, and may be level shifted, for example via a resistor divider network, and supplied to a current control amplifier. An outer voltage control loop may sense output voltage, and provide a voltage error signal from a voltage error amplifier to the resistor divider network. Power converters are operable as masters or slaves, and include sense input and trim input terminals.

Phase lock loop controlled current mode buck converter

A current mode buck converter has a power stage (105) and a feedback stage (110). The power stage (105) converts a higher power supply voltage level (Vdd) to a lower output voltage level (Vout). The feedback stage (110) is connected with the power stage (105) for controlling the levels of repetitive switching of an output current by phase and frequency locking a switching frequency of the output current to an external clocking signal (CLK). The feedback stage (110) controls two levels (Ihi, Ilow) of output current bounds by transforming a current error to a phase error to prevent error amplification such that an average output current remains constant at any duty cycle.

Trouble determining apparatus for DC boosting circuit

A system and method are disclosed to limit a maximum duty cycle and/or provide a volt-second clamp for a pulse-width modulated (PWM) signal. Depending on the circuit topology, this approach can limit the absolute duty cycle or operate as a volt-second clamp in which the duty cycle is limited as a function of a variable input control voltage, such as a line voltage. The duty cycle can be selectively programmed by setting one or more external reference components, such as one or more respective resistors. Additionally, through component matching, desired clamping can be achieved with a high level of accuracy.

SWITCHING POWER SUPPLY DEVICE

PROBLEM TO BE SOLVED: To provide a switching power supply device capable of improving stability of switching operation and jitter characteristics. SOLUTION: A switching power supply device of a non-linearity control system includes: a reference voltage generating section 18 that generates a reference voltage BG; a ripple injection section 17 that generates a ripple component by utilizing a switching voltage SW appeared at one end of a switching element 11 and generates a ripple reference voltage REF by injecting the ripple component into a reference voltage BG2 with an offset; a comparator 16 that compares a feedback voltage FB according to an output voltage OUT with the ripple reference voltage REF; switching control sections 13, 14, 15 that perform on/off control of the switching element 11 based on an output signal CMP of the comparator 16; and an offset adjustment section 20 that generates an offset voltage Voffset according to the switching voltage SW and provides the offset voltage ...

直列／並列の固体照明デバイス用のランプ制御されたドライバ

Chip for use in an operating device for lighting means

Die Erfindung betrifft einen Chip (1) zur Verwendung in einem Betriebsgerät für Leuchtmittel, wobei der Chip (1) dazu ausgebildet ist, einen Verarbeitungsblock (2) eines Betriebsgeräts für Leuchtmittel zu steuern, wobei der Chip (1) eine Vielzahl verschiedener sich in ihrer Funktion unterscheidende Verarbeitungsblöcke (2) steuern kann, wobei der Chip (1) dazu ausgebildet ist anhand wenigstens eines an dem Chip (1) anliegenden Signals auszuwählen welche Art von Verarbeitungsblock (2) gesteuert werden soll.

ELECTRICAL CIRCUIT FOR DELIVERING POWER TO CONSUMER ELECTRONIC DEVICES

ELECTRICAL CIRCUIT FOR DELIVERING POWER TO CONSUMER ELECTRONIC DEVICES An electrical circuit for providing electrical power for use in powering electronic devices is described herein. The electrical circuit includes a primary power circuit and a secondary power circuit. The primary power circuit receives an alternating current (AC) input power signal from an electrical power source and generates an intermediate direct current (DC) power signal. The intermediate DC power signal is generated at a first voltage level that is less than a voltage level of the AC input power signal. The secondary power circuit receives the intermediate DC power signal from the primary power circuit and delivers an output DC power signal to an electronic device. The output DC power signal is delivered at an output voltage level that is less than the first voltage level of the intermediate DC power signal. 0-10 UJSB 5 VOLT WALL CHARGER Figure 1 ...

CONTROL OF AN ELECTRICAL POWER SYSTEM RESPONSIVE TO SENSING A GROUND FAULT

In some examples, an electrical power system includes a differential bus, a power converter coupled to the differential bus, and a controller configured to control the power converter based on a first target value for the differential bus. The controller is also configured to sense that a ground fault has occurred in the electrical power system while controlling the power converter based on the first target value. The controller is further configured to, responsive to sensing that the ground fault has occurred, control the power converter based on a second target value for the differential bus, the second target value being different than the first target value.

Output regulator system

Switching power supply with a very wide dynamic range for measuring instruments

Power reset circuit

Isolation drive and isolation power supply two-in-one circuit

In the switch mode power converter dynamic voltage conversion control

With loop stabilizer of the pulse width modulation power stabilizer

Determining a dynamic adjustment of the voltage value of the circuit method and device

Method and apparatus to regulate an output voltage of a power converter at light/no load conditions

POWER CONVERSION DEVICE, TIME SIGNAL GENERATOR AND METHOD THEREOF

FAST LOAD TRANSIENT RESPONSE POWER SUPPLY SYSTEM USING DYNAMIC REFERENCE GENERATION

The disclosure is directed to a fast load transient response power supply system using dynamic reference voltage generation. A system may comprise, for example, at least power supply circuitry, voltage reference circuitry and dynamic reference generation circuitry. The power supply circuitry may be configured to generate an output voltage (e.g., for driving a load) based on a power supply input voltage. The voltage reference circuitry may be configured to generate a reference voltage for use in controlling the generation of the output voltage. The dynamic reference generation circuitry may be configured to generate a dynamic reference voltage as the input voltage for the power supply circuitry based on the reference voltage and the output voltage.

Current pulse transformer for isolating electrical signals

DC/DC CONVERTER FOR A VEHICLE

PROCEEDED Of OBLITERATION Of a MEMORY NONVOLATILE AND ELECTRICALLY ERASABLE, AND DEVICES ASSOCIATE

REGULATOR CIRCUIT AND SEMICONDUCTOR INTEGRATED CIRCUIT DEVICE

A regulator circuit includes a first transistor reducing an external supply voltage and outputting an internal active voltage to an output node; a first detector receiving a criteria level, detecting the internal active voltage based on an enable signal, controlling a gate voltage of the first transistor, and adjusting an output current thereof; a second transistor reducing the external supply voltage, and outputting an internal standby voltage corresponding to the internal active voltage to the output node; a second detector receiving a reference voltage, detecting the internal standby voltage regardless of the enable signal, controlling a gate voltage of the second transistor, and adjusting an output current thereof; a first switch controlling whether to output the reference voltage as the criteria level of the first detector; and a second switch controlling whether to output the voltage of the output node as the criteria level of the first detector. 1. A regulator circuit comprising:a first transistor of a first conductivity type configured to reduce an external supply voltage and output an internal active voltage to an output node;a first detector configured to receive a criteria level, detect the internal active voltage based on a state of an enable signal, control a gate voltage of the first transistor, and adjust an output current of the first transistor;a second transistor of the first conductivity type configured to reduce the external supply voltage, and output an internal standby voltage corresponding to the internal active voltage to the output node;a second detector configured to receive a reference voltage, detect the internal standby voltage regardless of the state of the enable signal, control a gate voltage of the second transistor, and adjust an output current of the second transistor;a first switch configured to control whether to output the reference voltage as the criteria level of the first detector; anda second switch configured to control ...

GATE DRIVER AND POWER CONVERTER

A gate driver includes: a timing determination unit configured to measure an on-time of a switching element and configured to determine, based on the on-time, a certain timing during a turn-off period of the switching element as an intermediate timing; and a driving condition changing unit configured to change a gate driving condition of the switching element at the intermediate timing determined by the timing determination unit. 1. A gate driver comprising:a timing determination unit configured to measure an on-time of a switching element and configured to determine, based on the on-time, a certain timing during a turn-off period of the switching element as an intermediate timing; anda driving condition changing unit configured to change a gate driving condition of the switching element at the intermediate timing determined by the timing determination unit.2. The gate driver according to claim 1 , wherein the driving condition changing unit is configured to decrease a current value of gate current flowing into a gate of the switching element at the intermediate timing.3. The gate driver according to claim 1 , wherein the switching element is a wide-bandgap device.4. A power converter comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the gate driver according to and'}the switching element. The present application is a continuation application of U.S. patent application Ser. No. 16/800,083 filed on Feb. 25, 2020, which is based upon and claims priority to Japanese Patent Application No. 2019-116691, filed on Jun. 24, 2019. The entire contents of the applications are incorporated herein by reference.The present invention relates to a gate driver and a power converter.Conventionally, in order to reduce surge voltage and switching losses, an active gate driving technique is known, in which switching speed is changed at an appropriate timing in accordance with drain current or collector current (which may be referred to as main current hereinafter) flowing ...

SWITCHING REGULATOR HAVING ADJUSTABLE INDUCTOR CURRENT THRESHOLD AND CONTROL METHOD THEREOF

A switching regulator having adjustable inductor current threshold employs a control method which includes: (S) determining whether an output voltage is greater than a reference voltage or determining whether a switching frequency of the power stage is smaller than a predetermined lower frequency limit, and (S) when it is determined yes in the step (S), adjusting the inductor current threshold, such that the switching regulator operates under a pseudo discontinuous conduction mode (PDCM) wherein the switching frequency is not smaller than the predetermined lower frequency limit. Consequently, when the switching regulator operates under a light load mode, an optimum balance between a total power consumption and switching noise interference will be ensured. 1. A control method of a switching regulator which has an adjustable inductor current threshold , wherein the switching regulator is configured to operably convert an input power to an output power and supply the output power to an external load , the switching regulator comprising a pulse width modulation (PWM) controller and a power stage , the power stage including: an inductor , a first power transistor and a second power transistor , which are coupled to one another , the PWM controller being configured to operably control the first power transistor and the second power transistor to convert the input power to the output power , wherein when an inductor current reaches an inductor current threshold , the PWM controller turns OFF the first power transistor and the second power transistor , the control method of the switching regulator having the adjustable inductor current threshold comprising the steps of:{'b': '1', '(S) determining whether an output voltage is greater than a reference voltage or determining whether a switching frequency of the power stage is smaller than a predetermined lower frequency limit; and'}{'b': 2', '1, '(S) when it is determined yes in the step (S), adjusting the inductor current ...

REFERENCE VOLTAGE CONTROL IN A POWER SUPPLY

A power supply includes a reference voltage generator, a power supply phase, and an adjustor. During operation, the reference voltage generator produces a reference voltage. The power supply phase produces an output voltage to power a load as a function of an output voltage feedback signal derived from the output voltage and the reference voltage. The adjustor adjusts a magnitude of the reference voltage to maintain regulation of the output voltage with respect to a desired voltage setpoint. 1. A power supply comprising:a reference voltage generator to produce a reference voltage;a phase to produce an output voltage to power a load as a function of the reference voltage and an output voltage feedback signal derived from the output voltage;an adjustor circuitry to adjust a magnitude of the reference voltage to maintain regulation of the output voltage as specified by a desired voltage setpoint; anda mode controller in communication with the adjustor circuitry, the mode controller controlling a switch disposed in a feedback path of the adjustor circuitry, the control of the switch switching the adjustor circuitry between a first mode and a second mode;wherein the adjustor circuitry is operable to set the reference voltage to a fixed voltage for each of multiple control cycles during the first mode;wherein the adjustor circuitry is operable to set the reference voltage to a varying reference voltage for each of multiple cycles during the second mode;wherein the reference voltage is a floor reference voltage; andwherein the adjustor circuitry is operable to reduce a magnitude of the floor reference voltage in response to detecting that a magnitude of the output voltage is greater than the desired voltage setpoint.2. The power supply as in further comprising:a monitor to produce an error voltage, the error voltage representing a difference between the desired voltage setpoint and the magnitude of the output voltage; andwherein the adjustor circuitry is operable to adjust ...

METHOD, SYSTEM AND APPARATUS FOR CONSTANT, HIGH SWITCHING FREQUENCY AND NARROW DUTY RATIO PWM CONTROL OF DC-DC CONVERTERS AND ACCURATE PFM CONTROL AT LIGHT LOAD

DC-DC power converter control comprises current starved delay lines for phase shifting control signals that set and reset a RS flip-flop to provide controllable PWM pulse widths from narrow to wide at a clock frequency. Precise pulse width control and a guaranteed minimum pulse width for pulse frequency modulation (PFM) control the DC-DC power converter during low power demand is also provided. PFM control maintains the same pulse width while decreasing the number of pulses per second when the output voltage exceeds an upper value and increases the number of pulses per second when the output voltage is less than a lower value. Voltage-to-current converters provide control currents to the current starved delay lines that provide the control signals to the SET and RESET inputs of the RS flip-flop. A D-flip-flop may further be used to improved circuit operation when generating high duty cycle (>50 percent) pulse widths. 1. A method for controlling a DC-DC converter with a constant frequency pulse width modulation (PWM) controller , said method comprising the steps of:delaying a clock signal by a fixed time with a first delay line, wherein the first delay line provides a first delayed clock signal;delaying the clock signal by a variable time with a second delay line having adjustable time delay, wherein the second delay line provides a second delayed clock signal, and the delay of the second delayed clock signal is greater than the delay of the first delayed clock signal;providing a power switch controller for coupling to and controlling a power switch of a DC-DC converter, wherein the power switch controller has a first input coupled to the first delayed clock signal and a second input coupled to the second delayed clock signal; andproviding an error amplifier having a first input coupled to an output voltage of the DC-DC converter, a second input couple to a reference voltage, and an output for controlling the time delay of the second delayed clock signal from the ...

MICRO-ELECTRO-MECHANICAL DEVICE HAVING A TILTABLE STRUCTURE, WITH DETECTION OF THE POSITION OF THE TILTABLE STRUCTURE

A micro-electro-mechanical device, wherein a platform is formed in a top substrate and is configured to turn through a rotation angle. The platform has a slit and faces a cavity. A plurality of integrated photodetectors is formed in a bottom substrate so as to detect the light through the slit and generate signals correlated to the light through the slit. The area of the slit varies with the rotation angle of the platform and causes diffraction, more or less marked as a function of the angle. The difference between the signals of two photodetectors arranged at different positions with respect to the slit yields the angle. 1. A micro-electro-mechanical device , comprising:a platform configured to rotate by a rotation angle (θ);a slit in the platform;a support structure supporting the platform and including a cavity facing a first side of the platform; anda plurality of integrated photodetectors facing the cavity and the first side of the platform and configured to receive light beams that pass through the slit in the platform.2. The device according to claim 1 , wherein a first photodetector of the plurality of integrated photodetectors is arranged at a first distance from the slit for generating a first light-intensity signal at a first rotation angle and for generating a second light-intensity signal at a second rotation angle claim 1 , and a second photodetector of the plurality of integrated photodetectors is arranged at a second distance from the slit for generating a third light-intensity signal at the first rotation angle and for generating a fourth light-intensity signal at the second rotation angle.3. The device according to claim 2 , wherein the slit has a center claim 2 , and the first photodetector and the second photodetector are arranged adjacent to a bottom wall of the cavity facing the platform claim 2 , the first and second photodetectors being arranged at different distances from a vertical line passing through the center of the slit and ...

MODULATING JITTER FREQUENCY AS SWITCHING FREQUENCY APPROACHES JITTER FREQUENCY

A controller for use in a power converter including a jitter generator circuit coupled to receive a drive signal from a switch controller and generate a jitter signal. The jitter signal is a modulated jitter signal when the drive signal is below a first threshold frequency. The switch controller is coupled to a power switch coupled to an energy transfer element. The switch controller is coupled to receive a current sense signal representative of a current through the power switch. The switch controller is coupled to generate the drive signal to control switching of the power switch in response to the current sense signal and the jitter signal to control a transfer of energy from an input of the power converter to an output of the power converter. 1. A controller for use in a power converter , comprising:a jitter generator circuit coupled to receive a drive signal from a switch controller and generate a jitter signal, wherein the jitter signal is a modulated jitter signal when the drive signal is below a first threshold frequency;the switch controller coupled to a power switch coupled to an energy transfer element, wherein the switch controller is coupled to receive a current sense signal representative of a current through the power switch, wherein the switch controller is coupled to generate the drive signal to control switching of the power switch in response to the current sense signal and the jitter signal to control a transfer of energy from an input of the power converter to an output of the power converter.2. The controller of claim 1 , wherein the jitter generator circuit comprises a timer circuit coupled to generate a hold signal in response to the drive signal to indicate the drive signal has been detected at a frequency below the first threshold frequency.3. The controller of claim 2 , wherein the jitter generator circuit further comprises a capacitor coupled to generate the jitter signal claim 2 , wherein the capacitor is charged by a first current ...

LOW INPUT VOLTAGE BOOST CONVERTER WITH PEAK INDUCTOR CURRENT CONTROL AND OFFSET COMPENSATED ZERO DETECTION

The low input voltage boost converter with peak inductor current control and offset compensated zero detection provide a boost converter scheme to harvest energy from sources with small output voltages. Some embodiments described herein includes a thermoelectric boost converter that combines an Icontrol scheme with offset compensation and duty cycled comparators to enable energy harvesting from TEG inputs as low as 5 mV to 10 mV, and the peak inductor current is independent to first order of the input voltage and output voltage. A control circuit can be configured to sample the input voltage (V) and then generate a pulse with a duration inversely proportional to Vso as to control the boost converter switches such that a substantially constant peak inductor current is generated. 116-. (canceled)17. An apparatus , comprising:an inductor configured to pass through an inductor current;a boost converter switch operatively coupled to the inductor, the boost converter switch configured to activate a boost conversion switching cycle; anda zero detection comparator operatively coupled to the inductor and the boost converter switch, the zero detection comparator configured to be activated for zero detection of the inductor current when the boost conversion switching cycle is activated, the zero detection comparator configured to be deactivated after completion of the zero detection,the zero detection comparator having an offset cancellation component configured to remove an offset in the zero detection comparator such that the zero detection comparator detects a current change when the inductor current decreases to zero.18. The apparatus of claim 17 , wherein the inductor is configured to be connected to an energy harvesting component to receive an input voltage.19. The apparatus of claim 17 , wherein the boost converter switch is configured to receive an input voltage and generate an output voltage based on the input voltage during the boost conversion switching cycle.20. ...

POWER SUPPLY CONTROL DEVICE

Disclosed are a power supply control device and an electronic apparatus. The power supply control device includes a power supply unit configured to generate an output voltage from an input voltage, and an output discharge unit configured to start to discharge the output voltage when an instruction to disable the power supply unit is given, and continue discharging the output voltage until the output voltage falls below a predetermined threshold voltage or until a predetermined delay time passes while the output voltage does not fall below the threshold voltage even when an instruction to enable the power supply unit is given. The electronic apparatus includes a power supply device including the power supply control device as a main constituent, and at least one load configured to operate while supplied with an output voltage from the power supply device. 1. A power supply control device comprising:a power supply unit configured to generate an output voltage from an input voltage; andan output discharge unit configured to start to discharge the output voltage when an instruction to disable the power supply unit is given, and continue discharging the output voltage until the output voltage falls below a predetermined threshold voltage or until a predetermined delay time passes while the output voltage does not fall below the threshold voltage even when an instruction to enable the power supply unit is given.2. The power supply control device according to claim 1 , wherein a discharge switch connected to a terminal to which the output voltage is applied;', 'a timer configured to generate a delayed signal by delaying an enable signal giving an instruction to enable/disable the power supply unit by the delay time;', 'a comparator configured to generate a comparison signal by comparing the output voltage and the threshold voltage with each other; and', 'a discharge controller configured to generate a driving signal for the discharge switch on a basis of both the delayed ...

Switching Converter, Circuit and Method for Controlling the Same

A switching converter, a circuit for controlling the same and a method for controlling the same. A ripple signal correlated to an input voltage and an on-off state of a power switch of the switching converter is superimposed on a feedback signal of an output voltage, so as to achieve closed-loop control of the output voltage. A dynamic response speed of the switching converter in case of a change of the input voltage is improved, while a switching frequency is kept constant. 1. A circuit for controlling a switching converter , comprising:a ripple generation circuit, configured to generate a ripple signal based on an input voltage of the switching converter and an on-off state of a power switch of the switching converter, and adjust a duty cycle of the power switch in response to a change of the input voltage.2. The circuit according to claim 1 , wherein turn-on duration of the power switch is adjusted in response to a change of the input voltage.3. The circuit according to claim 1 , the duty cycle is adjusted in accordance with a sum of the ripple signal and a feedback signal that represents an output voltage of the switching converter.4. The circuit according to claim 1 , wherein the ripple generation circuit comprises:a reference-signal generation circuit, configured to generate a triangular wave signal and a reference signal based on the input voltage and the on-off state of the power switch to adjust the turn-on duration of the power switch in a switching period.5. The circuit according to claim 4 , wherein the ripple generation circuit further comprises a ripple superimposition circuit claim 4 , configured to generate the ripple signal based on the triangular wave signal and the reference signal to adjust the switching period of the power switch.6. The circuit according to claim 4 , wherein the reference-signal generation circuit comprises:a first controlled current source, configured to generate, under control of the input voltage of the switching converter, a ...

SWITCHING REGULATOR AND POWER SWITCH CONTROLLER CIRCUIT THEREOF

A switching regulator includes a power stage circuit, an auxiliary winding, a start-up switch, and a power switch controller circuit. The power switch controller circuit includes a multifunction pin, a start-up controller circuit, and a feedback compensation circuit. The multifunction pin is coupled to a control terminal of the start-up switch, to deliver different signals with different functions under at least two different modes, respectively. The start-up controller circuit generates a start-up signal in a start-up mode, wherein the start-up signal is delivered to a control terminal of the start-up switch through the multifunction pin. An output terminal of the feedback compensation circuit is coupled to the multifunction pin, to provide a compensation signal at the multifunction pin in an operation mode. 1. A switching regulator , comprising:a power stage circuit, including an inductor and at least one power switch; wherein the least one power switch is coupled to the inductor and is configured to operate according to a switch control signal, to control a conduction status of the inductor, thereby converting an input power to an output power;an auxiliary winding, wherein the auxiliary winding and the inductor form a transformer, to generate a controller supply voltage;a start-up switch coupled between an input voltage related signal and the controller supply voltage, wherein the input voltage related signal is related to an input voltage of the input power; and a multifunction pin, which is coupled to a control terminal of the start-up switch and which is configured to operably deliver different signals with different functions under at least two different modes, respectively;', 'a start-up controller circuit, which is coupled to a control terminal of the start-up switch via the multifunction pin and which is configured to operably generate a start-up signal under a start-up mode, wherein the start-up signal is delivered to the control terminal of the start-up ...

BOOST CONVERTER WITH DOWN-MODE

A boost converter includes an input terminal, an output terminal, a switching terminal, a low-side transistor, and a down-mode detection circuit. The low-side transistor is coupled to the switching terminal. The down-mode detection circuit is coupled to the low-side transistor. The down-mode detection circuit is configured to detect a voltage at the output terminal greater than a voltage at the input terminal, and turn off the low-side transistor based on the voltage at the output terminal being greater than the voltage at the input terminal. 1. A boost converter , comprising:a switching node;a ground node;a down-mode detection circuit comprising an output;a modulation circuit comprising a first output; a first terminal coupled to the switching node;', 'a second terminal coupled to the ground node; and', 'a third terminal;, 'a low-side transistor comprising a first terminal coupled to third terminal of the low-side transistor;', 'a second terminal coupled to the first output of the modulation circuit;', 'a third terminal coupled to the ground node; and', 'a control terminal coupled to the output of the down-mode detection circuit., 'a first switch comprising2. The boost converter of claim 1 , wherein:the modulation circuit further includes a second output; and an output;', a first terminal coupled to the switching node;', 'a second terminal coupled to the output; and', 'a third terminal;, 'a high-side transistor comprising, a first terminal coupled to the third terminal of the high-side transistor;', 'a second terminal coupled to the first output of the modulator circuit;', 'a third terminal coupled to the second output of the modulator circuit; and', 'a control terminal coupled to the output of the down-mode detection circuit., 'a second switch comprising], 'the boost converter further includes3. The boost converter of claim 2 , further comprising:an input; and an output coupled to the third terminal of the high-side transistor;', 'an input coupled to the first ...

POWER SUPPLY AND WINDING SWITCH CONTROL

A power supply includes a primary winding, a secondary winding, a switch, and a controller. The secondary winding is magnetically coupled to the primary winding. The switch is coupled to the secondary winding and controls a state of current through the secondary winding. The controller controls the state of the switch based on an integrator voltage derived from monitoring a voltage from the secondary winding. For example, the controller activates the switch to an ON state in response to detecting a condition in which the magnitude of the monitored voltage of the secondary winding crosses a threshold value such as a magnitude of an output voltage produced from the secondary winding. 1. An apparatus comprising: monitor a voltage of a secondary winding magnetically coupled to a primary winding, the secondary winding operative to receive energy from the primary winding;', 'derive an integrator voltage based on the monitored voltage from the secondary winding; and', 'control an operational state of a switch coupled to the secondary winding based on the integrator voltage., 'a power supply controller operative to2. The apparatus as in claim 1 , wherein the monitored voltage from the secondary winding is received from a node associated with the secondary winding coupling the switch and the secondary winding.3. The apparatus as in claim 1 , wherein the power supply controller includes an integrator operative to produce the integrator voltage based on integrating a difference between the monitored voltage from the secondary winding and an output voltage produced by the secondary winding.4. The apparatus as in claim 1 , wherein the power supply controller includes a first comparator operative to compare the integrator voltage to a threshold value; andwherein the power supply controller is further operative to generate an enable signal enabling activation of the switch during a window of time in which the integrator voltage is detected as being greater than the threshold ...

Advanced PFC voltage controller

A power factor correction voltage controller is disclosed. In one embodiment, the controller has a linear PI compensator, a moving average filter, a non-linear error circuit, a hysteretic peak control, and an output power feedforward. The power factor correction voltage controller provides regulation of maximum and minimum voltage values but without allowing large periodic fluctuations in the input power/current. 1. A voltage controller for use with a power factor correction converter , and the power factor correction converter connected to a DC to AC converter , the voltage controller comprising:a digital controller comprising a voltage setpoint, a linear PI compensator, a non-linear gain, a peak hysteretic control, and an output power feedforward;power stages for providing voltage out feedback, and voltage in feedback;the linear PI compensator regulating voltage based upon a moving average filter (MAF) that receives the voltage out feedback from the power stages with the MAF being tuned in real time based on the output frequency of a DC to AC converter;the non-linear gain for determining a non-linear action when the voltage out feedback deviates from a setpoint by more than a pre-programmed limit and the non-linear action being utilized by the PI compensator to further accelerate voltage regulation;the peak hysteretic control detects the voltage out feedback of a DC bus and directs the power factor correction voltage controller output to zero if the DC bus voltage exceeds a maximum value, when the voltage deviation exceeds a pre-programmed limit, and the hysteretic peak control directs the power factor correction voltage controller output to a maximum when the DC bus voltage reaches a minimum value, when the voltage deviation exceeds a pre-programmed limit;the output power feedforward (FF) utilizing a MAF tuned in real time based on the output frequency of the DC to AC converter, and the applied FF term is the sum of a percentage of the output power FF term with ...

REFERENCE VOLTAGE CONTROL IN A POWER SUPPLY

A power supply includes a power converter, a reference voltage generator, and a controller. During operation, the power converter produces an output voltage to power a load. The reference voltage generator (such as a voltage mode amplifier circuit) generates a floor reference voltage, a magnitude of which varies as a function of the output voltage. The controller compares an output voltage feedback signal (derived from the output voltage) to the floor reference voltage to produce control output to control timing of activating switches in the power converter to maintain the output voltage within a desired voltage range. 1. A method comprising:producing an output voltage to power a load;generating a floor reference voltage, a magnitude of the floor reference voltage being adapted to vary as a function of the output voltage; andproducing control output as a function of the floor reference voltage and the output voltage to control generation of the output voltage.2. The method as in claim 1 , wherein producing the control output includes:receiving an output voltage feedback signal derived from the output voltage; andcomparing the output voltage feedback signal to the floor reference voltage to produce the control output.3. The method as in claim 1 , wherein generating the floor reference voltage includes implementing an integrator amplifier circuit to generate the floor reference voltage based on a magnitude of the output voltage and a fixed reference voltage.4. The method as in claim 3 , wherein the integrator amplifier circuit is configured to include a combination pole and zero set by components disposed in a feedback path between an output of the amplifier circuit to an inverting input of the amplifier circuit.5. The method as in claim 3 , wherein the integrator amplifier circuit includes a first gain path and a second gain path claim 3 , the first gain path providing DC (Direct Current) gain claim 3 , the second gain path providing AC (Alternating Current) gain.6. ...

SWITCHING CONVERTER FOR POWER DOMAIN SEPARATION

A power domain isolation system, such as without requiring a transformer, can include a reactive circuit, an input network having first and second input nodes that are coupled in parallel with the reactive circuit via respective first and second current control circuits, and an output network having first and second output nodes that are coupled in parallel with the reactive circuit via respective third and fourth current control circuits. The first and second current control circuits can be configured to couple the reactive circuit to the input nodes when the third and fourth current control circuits are configured to electrically isolate the reactive circuit from the output nodes, and the first and second current control circuits can be configured to electrically isolate the reactive circuit from the input nodes when the third and fourth current control circuits are configured to couple the reactive circuit to the output nodes. 1. A power domain isolation system without requiring a transformer , the system configured for bidirectional power signal communication between first and second power domains , the system comprising:a reactive circuit;an input network coupled to the first power domain and having first and second input nodes that are coupled in parallel with the reactive circuit via respective first and second current control circuits; andan output network coupled to the second power domain and having first and second output nodes that are coupled in parallel with the reactive circuit via respective third and fourth current control circuits;wherein the first and second current control circuits are configured to couple the reactive circuit to the input nodes when the third and fourth current control circuits are configured to electrically isolate the reactive circuit from the output nodes; andwherein the first and second current control circuits are configured to electrically isolate the reactive circuit from the input nodes when the third and fourth current ...

Disturbance quelling

A power converter that supplies a constant output voltage includes a regulator that connects to a charge pump. The charge pump is operable in plural charge-pump modes. A controller preemptively suppress evidence of occurrence of a transition between said charge-pump modes.

Primary Side Regulator

A primary side regulator according to an embodiment includes a power switch connected to a primary winding, a secondary winding configured to be insulated and coupled to the primary winding, a diode connected between the secondary winding and an output terminal, and an auxiliary winding coupled to the primary winding, and insulated and coupled to the secondary winding. The primary side regulator controls a switching operation of the power switch using a voltage obtained by filtering at least one of an estimation voltage signal corresponding to an output voltage of the output terminal and an estimation current signal corresponding to an output current flowing through the diode. 1. A primary side regulator , comprising:a power switch connected to a primary winding;a secondary winding;a diode connected between the secondary winding and an output terminal; andan auxiliary winding coupled to the primary winding, wherein the primary side regulator controls a switching operation including switching periods of the power switch using a voltage obtained by filtering at least one of an estimation voltage signal corresponding to an output voltage of the output terminal and an estimation current signal corresponding to an output current flowing through the diode.2. The primary side regulator of claim 1 , further comprising:a peak detector configured to detect a peak voltage of a first sensing voltage according to a current flowing through the power switch for each switching period of the power switch; anda current calculator configured to generate the estimation current signal by multiplying the peak voltage, the switching period of the power switch and an on signal corresponding to a turn-on period of the diode.3. The primary side regulator of claim 1 , further comprising:a sample and hold unit configured to sample and hold a second sensing voltage according to an auxiliary voltage of the auxiliary winding at a time at which a current does not flow through the diode after the ...

DEVICE AND METHOD FOR CLOSED-LOOP CONTROL OF A POWER CONVERTER

A control device for a switching power converter having an inductor element, a switch coupled to the inductor element, a storage element coupled to an output on which an output voltage is provided, and a diode element coupled to the storage element. The control device generates a command signal to control the switch and determine storage of energy in the inductor element in a first interval, and transfer of energy onto the storage element through the diode element in a second interval. A voltage shifter module generates a feedback voltage shifted relative to the output voltage. An amplification module has a first input receiving the feedback voltage, a second input receiving the reference voltage, and an output that supplies, as a function of the difference between the feedback and reference voltages, a control signal. A control unit receives the control signal and generates the command signal to control the switch. 1. A control device for controlling a switching converter , comprising:a voltage shifter module configured to be coupled to an output of the converter and coupled to receive a shifting reference voltage, the voltage shifter module configured to generate on a feedback node a feedback voltage having a value based on an output voltage on said output and said shifting reference voltage;an amplification module having a first input coupled to the voltage shifter module to receive the feedback voltage and a second input coupled to receive a reference voltage, the amplification module configured to generate on an output a control signal as a function of a difference between the feedback voltage and the reference voltage; anda control unit coupled to the amplification module to receive said control signal and configured to generate a command signal to be applied to control switching of a switch element of said converter as a function of said control signal.2. The control device according to claim 1 , wherein said voltage shifter module comprises:a current ...

POWER CONVERTER CONTROL AND PARAMETER SAMPLING

An apparatus includes a controller. The controller receives feedback associated with a device powered by a power source. Sampling of the feedback associated with the device is susceptible to noise caused by a power converter in a vicinity of the controller. To achieve more accurate sampling of the feedback, the controller adjusts operation of the power converter during a window of time in which the power source powers the device. The adjusted operation reduces noise caused by the power converter such that, during the window of time in which the operation of the power converter is adjusted, the controller derives one or more accurate sample values from the received feedback. 1. An apparatus comprising:{'claim-text': ['receive feedback associated with a device, the device being a load powered by a power source;', 'adjust switching operation of a power converter during a window of time to produce an accurate sample of the feedback, the adjusted switching operation of the power converter during the window of time operative to reduce noise caused by switching of the power converter; and', 'during the window of time in which the switching operation of the power converter is adjusted, derive a sample value from the feedback.'], '#text': 'a controller operative to:'}2. The apparatus as in claim 1 , wherein the feedback indicates a magnitude of current supplied by the power source to the device.3. The apparatus as in claim 1 , wherein the power converter is a switching power supply; andwherein the controller is further operative to: generate a control signal to control the power converter, the control signal indicating to temporarily discontinue switching of switches in the power converter during the window of time.4. The apparatus as in claim 2 , wherein the feedback indicates an amount of current supplied by the power source to the device; andwherein the power converter supplies power to a switch driver that controls delivery of the current from the power source to the ...

REFERENCE VOLTAGE GENERATOR WITH ADAPTIVE VOLTAGE AND INTEGRATED CIRCUIT CHIP

There is provided a reference voltage generator for providing an adaptive voltage. The reference voltage generator includes a steady current source and a PMOS transistor and an NMOS transistor cascaded to each other. A reference voltage provided by the reference voltage generator is determined by gate-source voltages of the PMOS transistor and the NMOS transistor. As said gate-source voltages vary with the temperature and manufacturing process, the reference voltage forms a self-adaptive voltage. 1. A reference voltage generator , comprising:a steady current source configured to provide a steady current;a PMOS transistor, a source electrode of the PMOS transistor being configured to receive the steady current, and the PMOS transistor having a first gate-source voltage; andan NMOS transistor, a drain electrode of the NMOS transistor being electrically coupled to a drain electrode of the PMOS transistor, and the NMOS transistor having a second gate-source voltage,wherein a reference voltage provided by the reference voltage generator is determined by the first gate-source voltage and the second gate-source voltage,the drain electrode of the NMOS transistor is directly connected to the drain electrode of the PMOS transistor at a node, andgate electrodes of the PMOS transistor and the NMOS transistor are connected to the node such that the drain and gate electrodes of the PMOS transistor and the drain and gate electrodes of the NMOS transistor are connected together.2. (canceled)3. The reference voltage generator as claimed in claim 1 , wherein an additional NMOS transistor is further coupled between the drain electrodes of the NMOS transistor and the PMOS transistor.4. The reference voltage generator as claimed in claim 1 , wherein an additional PMOS transistor is further coupled between the drain electrodes of the NMOS transistor and the PMOS transistor.5. The reference voltage generator as claimed in claim 1 , wherein an additional PMOS transistor and at least one ...

SOFT-START CIRCUIT FOR CONVERTERS, CORRESPONDING CONVERTER DEVICE AND METHOD

A circuit is operated by receiving an input reference signal at an input node, determining a scaling ratio based on the input reference signal, generating a digital input signal as a function of the determined scaling ratio, converting the digital input signal into an analog signal that is a scaled replica of the input reference signal, and providing the analog signal at an output node of the circuit and then, after a duration of time, coupling the input reference signal to the output node. 1. A method of operating a circuit , the method comprising:receiving an input reference signal at an input node;determining a scaling ratio based on the input reference signal;generating a digital input signal as a function of the determined scaling ratio;converting the digital input signal into an analog signal that is a scaled replica of the input reference signal; andproviding the analog signal at an output node of the circuit and then, after a duration of time, coupling the input reference signal to the output node.2. The method of claim 1 , further comprising buffering the input reference signal claim 1 , wherein coupling the input reference signal to the output node comprises coupling the buffered input reference signal to the output node.3. The method of claim 2 , wherein buffering the input reference signal comprises buffering the input reference signal with a non-unity gain.4. The method of claim 2 , further comprising performing a second buffering of the input reference signal claim 2 , wherein the analog signal that is a scaled replica of the second buffered input reference signal.5. The method of claim 4 , wherein buffering the input reference signal comprises buffering the input reference signal with a first gain and wherein performing the second buffering of the input reference signal comprises buffering with a second gain that is different than the first gain.6. The method of claim 1 , wherein the circuit includes a plurality of output nodes claim 1 , the method ...

Switching power supply circuit and led illumination device

A flyback-type switching power supply circuit provided with a transformer including a primary coil and a secondary coil, and a switching element connected to the primary coil, comprising: a multiplying circuit for multiplying a first value obtained by multiplying the on-duty ratio of a secondary current flowing to the secondary coil by a predetermined first constant, and a second value obtained by multiplying the peak value of a primary current flowing to the primary coil by a predetermined second constant; and a switching control circuit for controlling switching of the switching element so that the result of multiplication by the multiplying circuit and a third value obtained by multiplying a reference voltage by a predetermined third constant match; and the flyback-type switching power supply circuit is configured so that at least one of the first constant, the second constant, and the third constant is variable by an external signal.

Transistor driver and gate controller

The driver further includes a depletion P-type transistor including a gate connected to the first line, a drain connected to the second line, and a source connected to the third line.

NEGATIVE CHARGE PUMP AND AUDIO ASIC WITH SUCH NEGATIVE CHARGE PUMP

A negative charge pump without the need for a negative supply potential. The negative charge pump can be manufactured utilizing standard CMOS processes. The charge pump includes a first inverter, a second inverter, a charge storage and a coupling element. 1. A negative charge pump , comprisinga supply terminal, a ground (GND) terminal, an output terminal, and a first clock terminal;a first inverter, a second inverter, and a first charge storage;wherethe first inverter is connected between the supply terminal, the first clock terminal, and the first charge storage;the second inverter is connected between the first charge storage, the GND terminal, and the output terminal; and coupled to the first clock terminal;the first charge storage is connected between the first inverter and the second inverter;during operation and with respect to the electric potential of the GND terminal the electric potential of the supply terminal is positive while the electric potential of the output terminal is negative.2. The negative charge pump of claim 1 , further comprising a second charge storage connected between the first clock terminal and the second inverter.3. The negative charge pump of claim 1 , further comprisinga second clock terminal;a third inverter, a fourth inverter, and a third charge storage;wherethe third inverter is connected between the supply terminal, the second clock terminal, and the third charge storage;the fourth inverter is connected between the third charge storage, the GND terminal, and the output terminal; and coupled to the second clock terminal;the third charge storage is connected between the first inverter and the second inverter.4. The negative charge pump of claim 3 , further comprising a fourth charge storage connected between the second clock terminal and the second inverter.5. The negative charge pump of claim 1 , further comprising a first and a second cross coupling switch claim 1 , each being connected between the GND terminal claim 1 , the ...

DAC Servo

A servo block in a Buck, Boost, or switching converter allows a positive offset to be applied to the DAC voltage. In a typical switching converter application, the load will have a positive current, sourced from the switching converter to ground through the load. This will cause the output voltage of the switching converter to fall with the output impedance. The servo block corrects the output voltage by adjusting the DAC voltage upwards. In the case where current is forced back into the switching converter, causing the output voltage to rise, the servo block will have affect. The behavior of the servo block is desirable as it reduces the negative affect the servo block may have on load transients occurring when the switching converter is in over voltage. In particular, the idea of shifting the DAC voltage for several different loops with a single servo block is disclosed. This scheme is particularly effective for a switching converter design, allowing the slow loop integrator and fast existing switching converter control loops to be considered almost independently. 1. A servo block , for a switching converter , comprising a first GM stage , with a non-inverting input configured to a feedback voltage and an inverting input configured to a DAC voltage , wherein said first GM stage has an output connected to a capacitor , and to the gate of a second GM stage , said second GM stage comprising a transistor.2. The servo block of claim 1 , wherein said capacitor is connected to a supply voltage and a 50K resistor.3. The servo block of claim 1 , wherein said second GM stage has its source configured to said 50K resistor and its drain connected to a 5K resistor.4. The servo block of claim 1 , where the voltage across said 5K resistor is added to said DAC voltage to give a controlled offset to said servo block output voltage.5. The servo block of claim 1 , wherein a successive approximation scheme claim 1 , for an analog-to-digital converter claim 1 , employs said servo ...

Configurable-speed multi-phase dc/dc switching converter with hysteresis-less phase shedding and inductor bypass

Some embodiments provide a multi-phase DC/DC switching converter in which each of the phases are controlled using a common comparator for comparing an output voltage of the switching converter and a reference voltage, with in some embodiments each of the phases including a bypass switch for coupling ends of an output inductor of the switching converter. Some embodiments provide a multi-phase DC/DC switching converter in which some of the phases are operated with clock signals having frequencies different than clock signals used for operating others of the phases. Some embodiments provide a multi-phase DC/DC switching converter in which some of the phases include inductors having inductances different than inductances for inductors of others of the phases.

NVERTER APPARATUS INCLUDING CONTROL CIRCUIT EMPLOYING TWO-PHASE MODULATION CONTROL, AND INTERCONNECTION INVERTER SYSTEM INCLUDING THE INVERTER APPARATUS

A control circuit reduces switching loss by periodically stopping switching elements, and reduces the difference between the time for which positive switching elements are in on state and the time for which negative switching elements are in on state. The control circuit includes a command value signal generator generating command value signals Xu, Xv, and Xw from line voltage command value signals Xuv, Xvw, and Xwu, and includes a PWM signal generator generating PWM signals by the command value signals Xu, Xv, and Xw. The command value signals Xu, Xv, and Xw are continuously at “0” for a predetermined period, and are continuously at “2” for another period. This enables reducing the difference between the period for which the PWM signals are low and the period for which they are highl. 130-. (canceled)31. A control circuit for controlling driving of a plurality of switches in a power conversion circuit related to three-phase alternating current power with use of PWM signals ,the PWM signals being generated and output such that a waveform of an alternating current phase voltage output from or input to the power conversion circuit is a waveform that is continuously at a predetermined lower limit voltage value for each of two predetermined periods corresponding to 1/12 of one cycle and is continuously at a predetermined upper limit voltage value for each of two other predetermined periods corresponding to 1/12 of the one cycle,the control circuit comprising a command value signal generator and a PWM signal generator, whereinthe command value signal generator generates a first command value signal, a second command value signal and a third command value signal, each of the three command value signals having a one-cycle waveform that is at a predetermined upper limit value for each of two first periods and is at a predetermined lower limit value for each of two second periods, andthe PWM signal generator generates the PWM signals by comparing each command value signal ...

CONTROL CIRCUITS AND CONTROL METHODS FOR POWER CONVERTERS

In a general aspect, a control circuit for a power converter can include an option selector circuit that is coupled with a detection pin. The option selector can, based on a voltage applied to the detection pin being greater than or less than a threshold voltage, respectively generate a first enable signal or generate a second enable signal. The control circuit can also include a first mode controller coupled with the option selector and the detection pin. The first mode controller can be configured to, in response to receiving the first enable signal, operate the power converter in a first mode of operation. The control circuit can further include a second mode controller coupled with the option selector and the detection pin. The second mode controller can being configured to, in response to receiving the second enable signal, operate the power converter in a second mode of operation. 1. A control circuit for a power converter , the control circuit comprising:a detection pin; generate a first enable signal when the voltage applied to the detection pin is greater than a threshold voltage; and', 'generate a second enable signal when the voltage applied to the detection pin is less than the threshold voltage;, 'an option selector circuit coupled with the detection pin, the option selector circuit being configured, based on a voltage applied to the detection pin, toa first mode controller coupled with the option selector circuit and the detection pin, the first mode controller being configured to, in response to receiving the first enable signal from the option selector circuit, operate the power converter in a first mode of operation; anda second mode controller coupled with the option selector circuit and the detection pin, the second mode controller being configured to, in response to receiving the second enable signal from the option selector circuit, operate the power converter in a second mode of operation.2. The control circuit of claim 1 , wherein the first ...

SWITCH MODE POWER SUPPLIES, CONTROL ARRANGMENTS THEREFOR AND METHODS OF OPERATING THEREOF

A control arrangement is disclosed for a switch mode power supply (SMPS), the SMPS comprising an opto-coupler configured to transfer, from a secondary side to a primary side of the switch mode power supply by means of an LED current, a control signal indicative of an error between an amplifier-reference-signal and an amplifier-sensed-signal indicative of an actual value of an output parameter, the control arrangement comprising: an error amplifier configured to integrate the error to determine the LED current; and a feedback loop configured to adjust the magnitude of the LED current by modifying the amplifier-reference-signal or the amplifier-sensed-signal in order to reduce the error. A SMPS comprising such a control arrangement, and a corresponding method is also disclosed. 1. A control arrangement for a switch mode power supply , the switch mode power supply comprising an opto-coupler configured to transfer , from a secondary side to a primary side of the switch mode power supply by means of an LED current , a control signal indicative of an error between an amplifier-reference-signal and an amplifier-sensed-signal indicative of an actual value of an output parameter , an error amplifier configured to integrate the error to determine the LED current; and', 'a feedback loop configured to modify the amplifier-reference-signal or the amplifier-sensed-signal in order to reduce the error., 'the control arrangement comprising2. The control arrangement of claim 1 , wherein the feedback loop is configured to modify the amplifier-reference-signal or the amplifier-sensed-signalbased on the magnitude of the LED current.3. The control arrangement of claim 1 , wherein the error amplifier is configured to provide an LED control signal for the LED claim 1 , and wherein the feedback loop is configured to modify the amplifier-reference-signal or the amplifier-sensed-signal based on the LED control signal.4. The control arrangement of claim 1 , wherein the feedback loop is ...

MULTILEVEL SWITCHED-CAPACITOR AC-DC RECTIFIER FOR WIRELESS CHARGING WITH POWER REGULATION

Described herein is a wireless charging system including switched capacitor (SC) rectifiers with output regulation. The load for the receiver on mobile devices using wireless charging is a battery. Regulation is needed for battery charging applications, e.g. constant voltage charging, constant current charging, and pulsed charging. For this purpose, the wireless power transfer (WPT) receiver can possess some “intelligence” to monitor the output voltage/current, adjust the behavior of the electronic circuitries and achieve a closed-loop control. Because a multilevel switched-capacitor (MSC) rectifier has output control ability, this can allow the MSC rectifier to directly charge the battery without an additional DC/DC charger on-board the device. 1. An apparatus for regulating a multilevel switched-capacitor (MSC) rectifier circuit , comprising:a compensator configured to receive a comparison of an output of the MSC rectifier circuit with a reference level and generate a modulation index from the comparison; anda modulator configured to receive the modulation index and generate timings for a plurality of controls signals of switches in the MSC rectifier corresponding to the modulation index.2. The apparatus of claim 1 , wherein the modulator is further configured to:generate the timing for control signal of MSC rectifier circuit corresponding to a modulation index from one or more reference voltage levels and a reference waveform;generate a plurality of modulated direct current (DC) voltage levels from the modulation index and the one or more reference voltages; andgenerate a corresponding plurality of control signals by a comparison of the modulated DC voltage levels and the reference waveform.3. The apparatus of claim 2 , further comprising:a gain sensor configured to receive the output of the MSC rectifier circuit and generate therefrom an indication of an output level; anda comparator configured to receive the indication of the output level and the reference ...

IN-LINE BYPASS MODULE AND LINE DROP COMPENSATING POWER CONVERTER

A system for compensating a voltage line drop includes a shelving unit comprising at least one receiving port, wherein the at least one receiving port includes a connector. The system also includes a power converter operable to generate a line drop compensated output voltage, and a bypass module physically coupled between the connector and the power converter, wherein the bypass module is operable to selectively switch between providing the line drop compensated output voltage from the power converter to a load and bypassing the power converter to provide an uncompensated output voltage to the load. 1. A system for compensating a voltage line drop , the system comprising:a shelving unit comprising at least one receiving port, said at least one receiving port comprising a unit connector;a power converter operable to generate a line drop compensated output voltage; anda bypass module including a pair of bypass module connectors disposed on opposing sides of said bypass module, said bypass module configured to selectively slidably engage, via said bypass module connectors, said unit connector and said power converter to establish a physical and electrical coupling between said shelving unit and said power converter, said bypass module operable to selectively switch between providing the line drop compensated output voltage from said power converter to a load and bypassing said power converter to provide an uncompensated output voltage to the load;wherein said power converter is operable to selectively slidably engage said shelving unit via said unit connector to provide the line drop compensated output voltage directly thereto when said bypass module is removed.2. (canceled)3. The system of claim 1 , wherein said bypass module comprises:an input terminal configured to receive an input voltage; andan output terminal configured to provide the line drop compensated output voltage and the uncompensated output voltage to the load.4. The system of claim 1 , wherein said ...

AVP Combined with DAC Servo

An object of this disclosure is to implement a Buck, Boost, or other switching converter, with a circuit to supply a reference voltage and Adaptive Voltage Positioning (AVP), by means of a servo and programmable load regulation. The reference voltage is modified, achieving a high DC gain, using a servo to remove any DC offset at the output of the switching converter. The correction implemented by the servo is measured, and a programmable fraction of the correction is injected back on either the reference voltage or the output feedback voltage. To accomplish at least one of these objects, a Buck, Boost, or other switching converter is implemented, consisting of an output stage driven by switching logic, with a servo configured between the reference voltage and the control loops of the Buck converter. The AVP function is implemented on either the reference voltage or output feedback voltage. 1. A switching converter , comprising:a circuit to supply a reference voltage to said switching converter;a servo block, having as inputs an output feedback voltage and said reference voltage;an Adaptive Voltage Positioning (AVP) block connected at either of said inputs of said servo block, and receiving feedback from said servo block, wherein when said AVP block is configured on said reference voltage, and said servo block comprises a first transconductance (GM) stage, with non-inverting input connected to said output feedback voltage, and inverting input connected to an output of an op-amp, wherein said first GM stage has an output connected to a capacitor, and a second GM stage, said second GM stage comprising a first transistor;control loops connected to an output of said servo block, and said output feedback voltage;switching logic outputs of said control loops; andan output stage, driven by said switching logic, configured to supply the output voltage of said switching converter.2. The switching converter of claim 1 , wherein said AVP block is configured to measure the ...

HYSTERETIC PULSE MODULATION FOR CHARGE BALANCE OF MULTI-LEVEL POWER CONVERTERS

In described examples of methods and control circuitry to control a multi-level power conversion system, the control circuitry generates PWM signals having a duty cycle to control an output signal. The duty cycle is adjustable in different switching cycles. States of the system's switches are adjustable in one or more intervals within the switching cycles. In response to a voltage across a capacitor of the system being outside a non-zero voltage range, the control circuitry adjusts states of the switches in two intervals to discharge or charge the capacitor in a given switching cycle. 1. A power conversion system to convert an input signal at an input node into an output signal at an output node , the power conversion system comprising: a switching circuit connected to a switching node, the switching circuit including switches coupled between the input node and a first internal node, switches coupled between the first internal node and the switching node, switches coupled between the switching node and a second internal node, and switches coupled between the second internal node and a reference voltage node, the switches being coupled to generate a voltage signal at the switching node according to switching control signals; and', 'a capacitor connected between the first and second internal nodes of the switching circuit;, 'a converter circuit, includingan inductor coupled between the switching node and the output node; and generate the switching control signals as pulse width modulated signals having a duty cycle to control the output signal, the duty cycle being adjustable in different switching cycles, and states of the switches being adjustable in one or more intervals within the switching cycles; and', 'in response to a voltage across the capacitor being outside a non-zero voltage range, adjust states of the switches in two intervals to discharge or charge the capacitor in a given switching cycle., 'control circuitry to2. The power conversion system of claim 1 , ...

POWER SUPPLY SYSTEM AND SHORT CIRCUIT AND/OR BAD CONNECTION DETECTION METHOD THEREOF, AND POWER CONVERTER THEREOF

The present invention discloses a short circuit and/or bad connection detection method for use in a power supply system. The power supply system includes a power converter which converts an input voltage to an output voltage and supplies an output current to an electronic device. In the short circuit detection method, the conversion from the input voltage to the output voltage is disabled in a disable time period, and whether a short circuit occurs is determined according to the decreasing speed of the output voltage. In the bad connection detection method, an actual voltage and an actual current received by the electronic device are compared with the output voltage and the output current, to determine whether a bad connection occurs. 16-. (canceled)7. A abnormal condition detection method of a power supply system , wherein the power supply system includes a power converter for converting an input voltage to an output voltage to be supplied to an electronic device through a cable; the abnormal condition detection method of the power supply system comprising the steps of:stopping converting the input voltage to the output voltage for a disable time period in which a switch control unit of the power converter has been disabled;after the switch control unit has been disabled, subsequently determining whether the output voltage drops abnormally according to a decreasing speed of the output voltage, so as to subsequently determine whether or not a an abnormal condition occurs.8. The abnormal condition detection method of the power supply system of claim 7 , wherein the step of determining whether or not the abnormal condition occurs according to the decreasing speed of the output voltage includes:comparing the output voltage with a reference voltage.9. The abnormal condition detection method of the power supply system of claim 8 , wherein the reference voltage is adjustable.10. The abnormal condition detection method of the power supply system of claim 9 , wherein:when ...

POWER SUPPLY SYSTEM AND SHORT CIRCUIT AND/OR BAD CONNECTION DETECTION METHOD THEREOF, AND POWER CONVERTER THEREOF

The present invention discloses a short circuit and/or bad connection detection method for use in a power supply system. The power supply system includes a power converter which converts an input voltage to an output voltage and supplies an output current to an electronic device. In the short circuit detection method, the conversion from the input voltage to the output voltage is disabled in a disable time period, and whether a short circuit occurs is determined according to the decreasing speed of the output voltage. In the bad connection detection method, an actual voltage and an actual current received by the electronic device are compared with the output voltage and the output current, to determine whether a bad connection occurs. 16-. (canceled)7. A power supply system , comprising:a power converter for converting an input voltage to an output voltage and supplying an output current, wherein the output voltage and the output current are supplied to an electronic device through a cable; and a voltage sensing circuit for sensing an actual voltage received by the electronic device;', 'a current sensing circuit for sensing an actual current received by the electronic device;', 'a first analog-to-digital converter for converting the actual voltage to a first digital signal;', 'a second analog-to-digital converter for converting the actual current to a second digital signal; and', 'a calculation circuit for determining whether or not a bad connection occurs according to the first digital signal, the second digital signal, the output voltage and the output current., 'a bad connection detection unit, including8. The power supply system of claim 7 , wherein the calculation circuit compares the first digital signal with a desired level of the output voltage and compares the second digital signal with a desired level of the output current claim 7 , to determine whether or not the bad connection occurs.9. The power supply system of claim 7 , wherein the calculation circuit ...

Adaptive controller based on transient normalization

A controller is provided for controlling a power stage of a power converter according to a control law, the control law implementing a specific type of compensator and being pre-designed to generate an objective response of a default power converter for a default parameter value of a component of the power stage. The controller is further configured to determine an actual response for an actual parameter value of the component of the power stage and to alter the control law for the actual parameter value of the component of the power stage such that the actual response matches the objective response. The controller determines a degree of matching between the actual response and the objective response by filtering the actual response to generate a filtered actual response and integrating a product of the filtered actual response and a delayed actual response.

INSULATION TYPE SWITCHING POWER SOURCE APPARATUS

A power source apparatus comprises: a transformer that insulates a primary system and a secondary system and uses primary/secondary windings to transform an input voltage into an output voltage; a switching control device that is disposed in the primary system to drive the primary winding, and an output monitor device that is disposed in the secondary system to monitor the output voltage. The transformer includes a first auxiliary winding disposed in the primary system and a second auxiliary winding disposed in the secondary system. The output monitor device drives the second auxiliary winding to generate an induced voltage in the first auxiliary winding when the output voltage becomes smaller than a predetermined threshold voltage. The switching control device temporarily stops driving of the first winding upon detecting a light load state and resumes the driving of the first winding upon detecting the induced voltage in the first auxiliary winding. 112.-. (canceled)13. An insulation type switching power source apparatus comprising:a sample/hold circuit that samples/holds a feedback voltage, which is generated by using an auxiliary winding or a primary winding of a transformer, to generate a holding voltage, anda primary current control circuit that controls, in accordance with the holding voltage, a primary current that flows in the primary winding,wherein the sample/hold circuit counts a feedback voltage keeping duration from a time when the primary current is interrupted to a time when the feedback voltage becomes smaller than a threshold voltage, and based on a result of the counting, samples/holds the feedback voltage near an end of the feedback voltage keeping duration.14. The insulation type switching power source apparatus according to claim 13 , whereinthe sample/hold circuit repeats the sample/hold of the feedback voltage by a plurality of times to compare respective hold values with one another, and based on a result of the comparison, selects one of the ...

INTEGRATED CIRCUIT AND POWER SUPPLY CIRCUIT

A power supply circuit that generates an output voltage from an AC voltage. The power supply circuit includes a rectifier circuit that rectifies the AC voltage, an inductor receives a rectified voltage from the rectifier circuit, a transistor that controls an inductor current flowing through the inductor, and an integrated circuit that performs switching of the transistor. The integrated circuit includes an error output circuit that outputs an error between a feedback voltage and a reference voltage, a target value generating circuit that generates a target value of the inductor current based on the error, an adjustment circuit that adjusts the target value, first and second comparison circuits that compare the inductor current with a predetermined value and with the target value, respectively, and a drive circuit that turns on the transistor when the inductor current reaches the predetermined value, and turns off the transistor when the inductor current reaches the target value. 2. The integrated circuit according to claim 1 , whereinthe adjustment circuit supplies a current to the target value generating circuit, or receives a current from the target value generating circuit.3. The integrated circuit according to claim 1 , whereinthe adjustment circuit adjusts the target value when at least one of the AC voltage and the feedback voltage satisfies a predetermined condition.4. The integrated circuit according to claim 1 , whereinthe adjustment circuit reduces the target value when the AC voltage is not being input to the rectifier circuit.5. The integrated circuit according to claim 4 , wherein a voltage generating circuit to which the error is input, the voltage generating circuit being configured to generate a voltage corresponding to the error, and', 'a voltage divider circuit that divides the voltage generated by the voltage generating circuit, and outputs a result of the division as the target value, the voltage divider circuit including a resistor; and, 'the ...

DC-DC CONVERTER DRIVING DEVICE AND METHOD FOR DRIVING DC-DC CONVERTER USING THE SAME

Provided are a DC-DC converter driving device and a driving method thereof, the DC-DC converter driving device including an error detector configured to compare a first feedback voltage corresponding to a first output terminal with a first compensation reference voltage to generate a first error voltage, and configured to compare a second feedback voltage corresponding to a second output terminal with a second compensation reference voltage to generate a second error voltage, an interference detector configured to determine interference between the first and second output terminals on the basis of the first and second error voltages to generate an interference error voltage, and a reference voltage compensator configured to assign a weight to the interference error voltage to generate the first and second compensation reference voltages, and thus priorities are determined for outputs of the DC-DC converter and weights according thereto are assigned to reduce occurrence of cross-regulation. 1. A Direct Current-Direct Current (DC-DC) converter driving device , which drives a single-inductor multi-output (SIMO) DC-DC converter , comprising:an error detector configured to compare a first feedback voltage corresponding to a first output terminal with a first compensation reference voltage to generate a first error voltage, and configured to compare a second feedback voltage corresponding to a second output terminal with a second compensation reference voltage to generate a second error voltage;an interference detector configured to determine interference between the first output terminal and the second output terminal on a basis of the first and second error voltages to generate an interference error voltage on a basis of the determination; anda reference voltage compensator configured to assign a weight to the interference error voltage to generate the first and second compensation reference voltages.2. The DC-DC converter driving device of claim 1 , wherein the error ...

Switching regulator

A switching regulator includes a clamp circuit which clamps the output voltage of the error amplifier to the clamp voltage when an output voltage of an error amplifier is higher than a clamp voltage, a constant voltage generation circuit having one end connected to an output terminal of the error amplifier, and a phase compensation capacitor having one end connected to the other end of the constant voltage generation circuit, and the other end connected to a ground terminal. When the clamp circuit clamps the output voltage of the error amplifier, the constant voltage generation circuit lowers the voltage at one end of the phase compensation capacitor by a prescribed voltage. When the clamped state of the output voltage of the error amplifier is released, the constant voltage generation circuit lowers the voltage of the output terminal of the error amplifier from the clamp voltage by the prescribed voltage.

METHOD FOR OPTIMIZING THE OPERATION OF A DIGITAL CONTROLLER PROVIDED IN A CONTROL LOOP FOR A STEP-UP CONVERTER, A CONTROL LOOP, AND A COMPUTER PROGRAM PRODUCT

A method for optimizing the operation of a digital controller provided in a control loop for a step-up converter. The method includes: evaluating at least one output variable of the digital controller during operation of the step-up converter; estimating the instantaneous load resistance value in the path of the control loop based on the at least one evaluated output variable; setting at least one controller coefficient of the digital controller based on the estimated instantaneous load resistance value during operation of the step-up converter. A change in the setting of the at least one controller coefficient results in a change in the transition frequency in the control loop. Furthermore, a control loop for a step-up converter that includes a digital controller is provided, which is configured to carry out the steps of the method. A computer program product that includes computer-executable program code for carrying out the method. 110-. (canceled)11. A method for optimizing operation of a digital controller provided in a control loop for a step-up converter , comprising:evaluating at least one output variable of the digital controller during operation of the step-up converter;estimating an instantaneous load resistance value in a path of the control loop based on the at least one evaluated output variable;setting at least one controller coefficient of the digital controller based on the estimated instantaneous load resistance value during operation of the step-up converter;wherein a change in the setting of the at least one controller coefficient results in a change in a transition frequency in the control loop.12. The method as recited in claim 11 , wherein setting the at least one controller coefficient results in an increase in the transition frequency when the load resistance value claim 11 , estimated in the step of estimating claim 11 , is greater than a load resistance value previously estimated or initially taken into account.13. The method as recited in ...

REGULATION CIRCUIT ASSOCIATED WITH SYNCHRONOUS RECTIFIER PROVIDING CABLE COMPENSATION FOR THE POWER CONVERTER AND METHOD THEREOF

A regulation circuit of a power converter for cable compensation according to the present invention comprises a signal generator generating a compensation signal in accordance with a synchronous rectifying signal. An error amplifier has a reference signal for generating a feedback signal in accordance with an output voltage of the power converter. The compensation signal is coupled to program the reference signal. The feedback signal is coupled to generate a switching signal for regulating an output of the power converter. The regulation circuit of the present invention compensates the output voltage without a shunt resistor to sense the output current of the power converter for reducing power loss. 1. A regulation circuit of a power converter , comprising:an error amplifier having a reference signal for generating a feedback signal in accordance with an output voltage of the power converter; anda synchronous rectifying controller generating a synchronous rectifying signal;wherein the feedback signal is coupled to generate a switching signal for regulating the output voltage of the power converter and a voltage drop on the output voltage is compensated in response to the synchronous rectifying signal.2. The regulation circuit as claimed in claim 1 , wherein the reference signal is programmed in accordance with the synchronous rectifying signal.3. The regulation circuit as claimed in claim 1 , wherein the reference signal is programmed in accordance with a demagnetization time of a transformer of the power converter; the transformer comprising a primary winding and a secondary winding.4. The regulation circuit as claimed in claim 1 , wherein the synchronous rectifying signal is utilized to control a power transistor coupled to the power converter; the power transistor being used for a synchronous rectifier.5. The regulation circuit as claimed in claim 1 , wherein the synchronous rectifying signal is correlated to an output current of the power converter.6. A ...

DROOP COMPENSATION USING CURRENT FEEDBACK

A system includes a boost converter configured to amplify input voltage received from one or more power sources into output voltage. The system also includes a current sensor configured to sense a current of the input voltage for example, by induction. The system further includes a controller configured to adjust an amplification of the boost converter in response to the current sensed by the current sensor. When utilized in each of a plurality of power source modules coupled to a common load, the power source modules adjust the amplifications of their boost converters towards equalization of their output voltages and their currents in response to sensed currents of the input voltages changing through demand of the common load. Associated systems and methods are also disclosed. 1. A system comprising:a plurality of boost converters each coupled to a respective one or more electrochemical cells for receiving an input signal therefrom, each of the boost converters being configured to amplify voltage of the input signal received from its respective one or more electrochemical cells into an output signal, the output signals being supplied simultaneously to a common load;a current sensor associated with each of the plurality of boost converters, each current sensor being configured to sense a current of the input signal for its associated boost converter prior to amplification of the input signal by the boost converter; anda controller associated with each of the plurality of boost converters, each controller being configured to adjust the voltage amplification of the associated boost converter in response to the current sensed by the associated current sensor, wherein the adjustment decreases the amplification as the current sensed increases based on demand from the load;wherein the boost converters and their controllers are independent of one another such that the boost converters operate independently of one another to cause the respective currents of the input ...

Multiphase Converter System and Control Method

A multiphase operation control method comprises configuring a plurality of power phases of a power converter to operate in an interleaved manner by passing a token sequentially among the plurality of power phases, turning on a first power phase after the first power phase possesses the token and receives a trigger signal from a control circuit of the first power phase, passing the token to a second power phase after the first power phase finishes, passing the token sequentially until a last power phase of the plurality of power phases possesses the token and forwarding the token to the first power phase after the last power phase finishes.

POWER SUPPLY CIRCUIT

According to one embodiment, a power supply circuit includes a smoothing capacitor that is charged with a charge current from an output transistor and outputs a voltage as an output voltage; a control loop that controls a conduction state of the output transistor depending on a difference value between the output voltage and a reference voltage; and a gain adjustment circuit that adjusts a gain of the control loop depending on magnitude of the charge current after the charge starts. 1. A power supply circuit comprising:a smoothing capacitor that is charged with a charge current from an output transistor and outputs a voltage generated by the charge as an output voltage;a control loop that controls a conduction state of the output transistor depending on a difference value between the output voltage and a reference voltage; anda gain adjustment circuit that adjusts a gain of the control loop depending on magnitude of the charge current after the charge of the smoothing capacitor with the charge current starts.2. The power supply circuit according to claim 1 , whereinthe gain adjustment circuit adjusts the gain of the control loop depending on a value of the charge current of a point that is after predetermined time from a point of time of start of the charge.3. The power supply circuit according to claim 2 , whereinthe gain adjustment circuit adjusts the gain of the control loop depending on a comparison result of comparing a value of the charge current of a point that is after predetermined time from a point of time of start of the charge with a predetermined threshold value.4. The power supply circuit according to claim 1 , whereinthe gain adjustment circuit adjusts the gain of the control loop depending on time taken from start of the charge until the charge current reaches a predetermined set value.5. The power supply circuit according to claim 4 , whereinthe gain adjustment circuit adjusts the gain of the control loop depending on a comparison result of ...

DIFFERENTIAL TO SINGLE-ENDED HIGH BANDWIDTH COMPENSATOR

A compensator is described with higher bandwidth than a traditional differential compensator, lower area than traditional differential compensator (e.g., 40% lower area), and lower power than traditional differential compensator. The compensator includes a differential to single-ended circuitry that reduces the number of passive devices used to compensate an input signal. The high bandwidth compensator allows for faster power state and/or voltage transitions. For example, a pre-charge technique is applied to handle faster power state transitions that enables aggressive dynamic voltage and frequency scaling (DVFS) and voltage transitions. The compensator is configurable in that it can operate in voltage mode or current mode. 1. An apparatus comprising:one or more bridges where an individual bridge includes a high-side switch and a low-side switch;one or more inductors coupled to the one or more bridges;a capacitor coupled to the one or more inductors and to a load; anda circuitry to receive a voltage of the capacitor, or a divided version of the voltage of the capacitor, and a reference, wherein the circuitry is to generate an output which is to modify a characteristic of a modulation signal, wherein the circuitry comprises a differential to single-ended circuitry and a compensation circuitry coupled to a first output of the differential to single-ended circuitry, and wherein a second output of the compensation circuitry is the output of the circuitry, wherein the differential to single-ended circuitry comprises an amplifier having an input coupled to a resistor divider, wherein the resistor divider is to receive the voltage of the capacitor or the divided version of the voltage of the capacitor, wherein the differential to single-ended circuitry has a first input to receive the voltage of the capacitor or the divided version of the voltage of the capacitor, and a second input to receive a round voltage sensed at the load.2. The apparatus of claim 1 , wherein the ...

INTEGRATED CIRCUIT WITH CONFIGURABLE CONTROL AND POWER SWITCHES

Disclosed examples include integrated circuits configurable according to sensed circuit conditions to provide configurable power converter topologies with externally connected circuitry to implement buck, boost, buck-boost, low dropout and/or hot-swap power converters. The ICs include one or more sets of series connected high and low side transistors connected with corresponding IC pads to allow connection to external circuitry to form a particular power converter configuration. The IC includes a control circuit and a configuration circuit to sense a circuit condition of the IC and to configure the control circuit to provide switching control signals to the transistors to implement one of a plurality of power converter topologies. 1. An integrated circuit (IC) , comprising: a first transistor with a first terminal connected to a first pad of the IC, a second terminal connected to a second pad of the IC, and a control terminal to receive a first switch control signal, and', 'a second transistor with a first terminal connected to the second pad, a second terminal connected to a third pad of the IC, and a control terminal to receive a second switch control signal;, 'a switch circuit, includinga control circuit configurable according to a mode control signal to operate in one of a plurality of modes to provide the first and second switch control signals to implement a power converter using an external circuit connected to at least one of the first, second, and third pads;a configuration circuit to sense a circuit condition of the IC, and to provide the mode control signal to configure the control circuit according to the sensed circuit condition; a third transistor with a first terminal connected to a fourth pad of the IC, a second terminal connected to a fifth pad of the IC, and a control terminal to receive a third switch control signal, and', 'a fourth transistor with a first terminal connected to the fifth pad, a second terminal connected to a sixth pad of the IC, ...

FLYBACK CONVERTER AND CONTROLLING METHOD THEREOF

A flyback converter includes a primary side circuit, a secondary side circuit and a controller. The primary side circuit includes a primary winding and a main switch electrically connected to the primary winding. The secondary side circuit includes a secondary winding and an output diode electrically connected to the secondary winding and having a parasitic electrical parameter. The controller generates a correcting parameter for counteracting an effect on an output voltage of the flyback converter from the parasitic electrical parameter, wherein the parasitic electrical parameter is an equivalent series-connection resistance Rof the output diode and the secondary side circuit, and the correcting parameter is calculated based on the formula 1. A flyback converter having an output current and an output voltage , comprising:a transformer including a primary winding, a secondary winding and an auxiliary winding;a main switch electrically connected to the primary winding;an output diode electrically connected to the secondary winding; and a current-adjusting parameter generating module receiving an initial current value at a time when the main switch is turned on, a peak current value at a time when the main switch is turned off, a conducting duration of the output diode and a first turns number ratio of the secondary winding to the primary winding to generate a current-adjusting parameter;', 'a voltage-adjusting parameter generating module receiving the initial current value, the first turns number ratio, a second turns number ratio of the auxiliary winding to the secondary winding, an output voltage value of the flyback converter, a conducted voltage drop value of the output diode and an equivalent resistance of the output diode to generate a voltage-adjusting parameter;', 'a current adjuster adjusting the output current of the flyback converter according to the current-adjusting parameter; and', 'a voltage adjuster adjusting the output voltage of the flyback ...

MULTl-LEVEL POWER CONVERTER AND RELATED METHODS

A variable-level flyback power converter is configured to provide an accurate output voltage at various regulation levels. The variable-level flyback power converter may include a switch coupled to a secondary winding of a transformer, a diode coupled to a primary winding of the transformer, and a controller coupled to the switch. The controller may scale an initial reference voltage based on a desired output voltage and a forward voltage drop across the diode, compare the scaled reference voltage with a feedback voltage sensed at an auxiliary winding of the transformer to generate an error signal, and modulate a pulse signal provided to the switch based on the error voltage. 1. A switching power converter configured to provide at least a first desired output voltage and a second desired output voltage different from the first desired output voltage , comprising:a switch coupled to a primary winding of a transformer;a diode coupled to a secondary winding of the transformer; and scale a first reference voltage by a scale factor to generate a second reference voltage, wherein the scale factor is based on the second desired output voltage and a forward voltage drop of the diode, wherein the first reference voltage corresponds to the first desired output voltage and the second reference voltage corresponds to the second desired output voltage;', 'compare the second reference voltage and a feedback voltage to generate an error signal; and', 'modulate a pulse signal provided to the switch based on the error signal., 'a controller coupled to the switch and configured to2. The switching power converter of claim 1 , wherein the controller is configured to sense the feedback voltage at a primary-side auxiliary winding of the transformer.3. The switching power converter of claim 2 , wherein the controller is configured to sense the feedback voltage at a transformer reset time of the switching power converter.4. The switching power converter of claim 1 , wherein the scaling the ...

POWER CONVERTERS WITH ADAPTIVE OUTPUT VOLTAGES

A switching power converter is provided that transitions between output voltage modes over a delay period using at least one of an adaptive resistor and an adaptive reference voltage circuit. 1. A switching power converter , comprising:a voltage divider configured to produce a feedback voltage from an output voltage, the voltage divider including an adaptive resistor configured to produce an adaptive resistance for changing the feedback voltage, and aa control circuit configured to control the adaptive resistor so that the adaptive resistance has a first value during a first output voltage mode for the switching power converter and so that the adaptive resistance has a second value during a second output voltage mode for the switching power converter, the second value being greater than the first value, and wherein the adaptive resistor is configured to continually increase its adaptive resistance over a delay period in a transition between the first value and the second value.2. The switching power converter of claim 1 , wherein the adaptive resistor is further configured to continually decrease its adaptive resistance over the delay period in a transition between the second value and the first value.3120. The switching power converter of claim 1 , wherein the adaptive resistor is further configured so that the delay period has a duration between millisecond and milliseconds.4. The switching power converter of claim 1 , further comprising:a reference circuit configured to provide a reference voltage; andan error amplifier having a first input terminal for receiving the feedback voltage and a second input terminal for receiving the reference voltage, the error amplifier being configured to compare the feedback voltage to the reference voltage to produce an error voltage, wherein the adaptive resistor couples between the first input terminal and ground.5. The switching power converter of claim 4 , wherein the adaptive resistor comprises a transistor having a first ...

Controller and converter including for the same

The object of the present invention is to provide a controller capable of controlling the brightness and preventing an erroneous operation from being generated and a converter including for the same. The present invention provides a controller including a gate driving unit for outputting a gate signal which is controlled by a feedback signal and a control block for modulating the feedback signal corresponding to a size of a sensing signal, wherein the feedback signal is generated by receiving the sensing signal, and a converter including the same.

Switched-Capacitor Regulators With Output Transient Compensation

A power converter circuit included in a computer system includes a switched-capacitor circuit as well as one or more bypass devices, and generates a particular voltage on a regulated power supply node. In response to situations that can result in a rapid transient of the voltage level on the regulated power supply node (e.g., upscaling or downscaling), the power converter circuit may activate the bypass devices to source or sink current from the regulated power supply node. By employing both the switched-capacitor circuit and the bypass devices, the power converter may be able to more rapidly adjust the voltage level of the regulated output supply node, as well as maintain voltage across the devices and capacitors included in the switched-capacitor circuit within specified tolerances. 1. An apparatus , comprising: in response to an activation of a pre-charge mode, couple the plurality of capacitors between the regulated power supply node and a ground supply node; and', 'generate a particular voltage level on the regulated power supply node using a reference voltage;, 'a switched-capacitor circuit coupled to a regulated power supply node, wherein the switched-capacitor circuit includes a plurality of capacitors and a plurality of switches, and wherein the switched-capacitor circuit is configured toa first bypass device coupled between an input power supply node and the regulated power supply node, wherein the first bypass device is configured to source a bypass current to the regulated power supply node; and transition the reference voltage between a first value and a second value according to a programmable ramp control signal; and', 'activate the first bypass device., 'in response to receiving a change request, 'a control circuit configured to2. The apparatus of claim 1 , wherein the control circuit is further configured to:in response to receiving the change request, change an operation mode of the switched-capacitor circuit based on a new value of the reference ...

SWITCHING POWER CONVERTER WITH MAGNETIZING CURRENT SHAPING

A switching power converter is provided that uses at least two peak current thresholds. In particular, the switching power converter clamps a desired peak current to not fall below a low peak current threshold value while a rectified input voltage is decreasing and to not fall below a high peak current threshold value subsequent to zero crossing times for an AC input voltage. 1. A method , comprisingrectifying an AC input voltage to produce a rectified input voltage;determining a desired peak current through a power factor control (PFC) feedback loopsetting a peak current threshold to equal a first threshold value prior to a zero crossing time for the AC input voltage and to equal a second threshold value after the zero crossing time, wherein the first threshold value is less than the second threshold value; andcycling a power switch so that power switch conducts a magnetizing current equaling the desired peak current when the desired peak current exceeds the peak current threshold and so that the power switch conducts a magnetizing current equaling the peak current threshold when the desired peak current is less than the peak current threshold.2. The method of claim 1 , wherein the rectified input voltage is decreasing from a maximum value prior to the zero crossing time and is increasing following the each zero crossing time.3. The method of claim 1 , wherein cycling the power switch conducts the magnetizing current through a primary winding in a flyback converter.4. The method of claim 1 , wherein cycling the power switch conducts the magnetizing currents through an inductor in a DC-DC switching power converter.5. The method of claim 4 , wherein the cycling the power switch conducts the magnetizing currents through an inductor in a buck-boost converter.6. The method of claim 1 , wherein determining the desired peak current comprises comparing a feedback voltage to a reference voltage to determine an error signal.7. The method of claim 6 , wherein determining the ...

SHUNT REGULATOR INCLUDING RAMP CONTROL CIRCUIT

In some examples, a shunt regulator includes a plurality of selection pins configured to receive a digital signal. The shunt regulator also includes an internal reference voltage selection circuit coupled to the plurality of selection pins, the internal reference voltage selection circuit configured to select a first internal reference voltage of the shunt regulator based on the digital signal. The shunt regulator further includes a soft ramp control circuit coupled to the internal reference voltage selection circuit and to a soft ramp control pin that is configured to carry a second internal reference voltage, the soft ramp control circuit configured to compare the first and the second internal reference voltages to generate a soft ramp control output signal. 16.-. (canceled)7. A shunt regulator , comprising:a plurality of selection pins configured to receive a digital signal;an internal reference voltage selection circuit coupled to the plurality of the selection pins, the internal reference voltage selection circuit configured to select a first internal reference voltage of the shunt regulator based on the digital signal received by the plurality of selection pins; and a comparison circuit configured to receive and compare the first internal reference voltage and the second internal reference voltage; and', 'a current limited buffer coupled to the comparison circuit and configured to change the second internal reference voltage to a third internal reference voltage at the soft ramp control pin in response to the comparison., 'a soft ramp control circuit coupled to a soft ramp control pin that is configured to receive a second internal reference voltage and generate a soft ramp control output signal, the soft ramp control circuit comprising8. The shunt regulator of claim 7 , wherein the current limited buffer comprises:a first constant current source;a second constant current source;a switch coupled to the first and the second constant current sources; andan ...

INSULATION TYPE SWITCHING POWER SOURCE APPARATUS

A power source apparatus comprises: a transformer that insulates a primary system and a secondary system and uses primary/secondary windings to transform an input voltage into an output voltage; a switching control device that is disposed in the primary system to drive the primary winding, and an output monitor device that is disposed in the secondary system to monitor the output voltage. The transformer includes a first auxiliary winding disposed in the primary system and a second auxiliary winding disposed in the secondary system. The output monitor device drives the second auxiliary winding to generate an induced voltage in the first auxiliary winding when the output voltage becomes smaller than a predetermined threshold voltage. The switching control device temporarily stops driving of the first winding upon detecting a light load state and resumes the driving of the first winding upon detecting the induced voltage in the first auxiliary winding. 1. An insulation type switching power source apparatus comprising:a transformer that insulates a primary circuit system and a secondary circuit system from each other and uses a primary winding and a secondary winding to transform an input voltage into an output voltage,a switching control device that is disposed in the primary circuit system to drive the primary winding, andan output monitor device that is disposed in the secondary circuit system to monitor the output voltage,wherein the transformer includes a first auxiliary winding disposed in the primary circuit system and a second auxiliary winding disposed in the secondary circuit system besides the primary winding and the secondary winding,the output monitor device drives the second auxiliary winding to generate an induced voltage in the first auxiliary winding when the output voltage becomes smaller than a predetermined threshold value voltage, andthe switching control device temporarily stops driving of the first winding upon detecting a light load state and ...

CONTROLLER FOR ADJUSTING AN OUTPUT VOLTAGE OF A POWER CONVERTER AND RELATED METHOD THEREOF

A controller for adjusting an output voltage of a power converter includes a gate control signal generation circuit, a feedback signal detection module, and a reference voltage generation module. The gate control signal generation circuit generates a gate control signal to a power switch of a primary side of the power converter according to a reference voltage and a plurality of signals corresponding to the primary side and a secondary side of the power converter. The feedback signal detection module generates a logic signal according to a combination corresponding to the plurality of signals. The reference voltage generation module generates the reference voltage to the gate control signal generation circuit according to the logic signal. The power switch adjusts the output voltage of the secondary side of the power converter according to the gate control signal. 1. A controller for adjusting an output voltage of a power converter , the controller comprising:a gate control signal generation circuit for generating a gate control signal to a power switch of a primary side of the power converter according to a reference voltage and a plurality of signals corresponding to the primary side and a second side of the power converter;a feedback signal detection module coupled to the primary side of the power converter for generating a logic signal according to a combination corresponding to the plurality of signals; anda reference voltage generation module coupled to the feedback signal detection module for generating the reference voltage to the gate control signal generation circuit according to the logic signal;wherein the power switch adjusts the output voltage of the second side of the power converter according to the gate control signal.2. The controller of claim 1 , wherein the plurality of signals comprise a voltage peak corresponding to a current flowing through the power switch of the primary side claim 1 , a discharge time of the second side of the power ...

Control of Four-Switch, Single Inductor, Non-Inverting Buck-Boost Converters

A power converter includes a buck leg circuit connected between a voltage input of the power converter and ground, a boost leg circuit connected between a voltage output of the power converter and ground, an inductor connected between the buck leg circuit and the boost leg circuit, an error amplifier configured to compare the voltage output of the power converter against a reference voltage to yield a feedback signal, and a control circuit. The control circuit is configured to generate a reference buck ramp configured to be compared against the feedback signal to determine whether to operate the buck leg circuit in buck mode, and to generate a reference boost ramp by superposing a variable boost ramp portion on to the reference buck ramp, the reference boost ramp configured to be compared against the feedback signal to determine whether to operate the boost leg circuit in boost mode. 1. A power converter , comprising:a buck leg circuit connected between a voltage input of the power converter and ground;a boost leg circuit connected between a voltage output of the power converter and ground;an inductor connected between the buck leg circuit and the boost leg circuit;an error amplifier configured to compare the voltage output of the power converter against a reference voltage to yield a feedback signal; and generate a reference buck ramp configured to be compared against the feedback signal to determine whether to operate the buck leg circuit in buck mode; and', 'generate a reference boost ramp by superposing a variable boost ramp portion on to the reference buck ramp, the reference boost ramp configured to be compared against the feedback signal to determine whether to operate the boost leg circuit in boost mode., 'a control circuit configured to2. The power converter of claim 1 , further comprising a burst mode circuit configured to send a signal to the control circuit to operate the buck leg circuit or the boost leg circuit in a burst mode based upon a ...

SYSTEM AND METHOD FOR CONTROLLING VOLTAGE CONTROL LOOP IN POWER CONVERTER

A method for controlling a power converter includes determining whether a value of a feedback signal is in a first range, detecting a plurality of points of the feedback signal, and decreasing one or both of a proportional coefficient and an integral coefficient of a first control loop of the power converter at a first plurality of times corresponding to the detected plurality of points of the feedback signal when the value of the feedback signal is in the first range. The feedback signal indicates an output signal of the power converter. A circuit for controlling a power converter includes a transient detector that generates a transient detection signal in response to a feedback signal indicating an output signal of the power converter and a gain selector that generates a gain selection signal in response to the transient detection signal. 1. A method for controlling a power converter , the method comprising:determining whether a value of a feedback signal is in a first range, the feedback signal indicating an output signal of the power converter;detecting a plurality of points of the feedback signal; anddecreasing one or both of a proportional coefficient and an integral coefficient of a first control loop of the power converter at a first plurality of times corresponding to the detected plurality of points of the feedback signal when the value of the feedback signal is in the first range.2. The method of claim 1 , wherein the first plurality of times are respectively associated with a second plurality of times claim 1 , a slope of the feedback signal becoming substantially equal to zero at the second plurality of times.3. The method of claim 1 , further comprising:causing a transient detection signal to transition from a first logic value to a second logic value at the first plurality of times; andchanging a value of a gain selection signal in response to the transient detection signal.4. The method of claim 3 , wherein the value of the gain selection signal is ...

PEAK CURRENT LIMIT IN A SLOPE-COMPENSATED CURRENT MODE DC-DC CONVERTER

Slope-compensated current mode DC-DC converters. Example embodiments are methods of operating a slope-compensated current mode DC-DC converter including asserting a pulse width modulation (PWM) signal in a switching period to couple an input voltage to the inductor; sensing an inductor current through an inductor to generate a sensed current signal; generating a slope compensation signal having a peak amplitude during the switching period; generating a slope offset signal based on a sum of a predefined threshold with a product of a duty cycle of the PWM signal and the peak amplitude; and de-asserting the PWM signal during the switching period based on the sensed current signal and the slope offset signal. 1. A method of operating a DC-DC converter , comprising:asserting a pulse width modulation (PWM) signal in a switching period to couple an input voltage to an inductor;sensing an inductor current through the inductor to generate a sensed current signal;generating a slope compensation signal having a peak amplitude during the switching period;generating a slope offset signal based on a sum of a predefined threshold with a product of a duty cycle of the PWM signal and the peak amplitude; andde-asserting the PWM signal during the switching period based on the sensed current signal and the slope offset signal.2. The method of further comprising:generating a feedback signal using an output voltage of the DC-DC converter;generating an error signal as a difference between the feedback signal and a voltage reference signal; andclamping the error signal to not to exceed the slope offset signal to define a clamped error signal.3. The method of wherein de-asserting the PWM signal further comprises de-asserting the PWM signal in response to the sensed current signal exceeding the clamped error signal.4. The method of claim 1 , wherein de-asserting the PWM signal further comprises de-asserting the PWM signal in response to the sensed current signal exceeding a difference of the ...

VOLTAGE-REGULATING CIRCUIT AND REGULATED POWER-SUPPLY MODULE

A voltage-regulating circuit comprising: 2. The voltage-regulating circuit according to claim 1 , wherein the control circuit commands:the switch to open when the amplitude deviation between the input voltage and the output voltage is greater than or equal to the first threshold,the switch to close when the amplitude deviation between the input voltage and the output voltage is less than the first threshold, andthe switch to close when the amplitude deviation between the input voltage and the output voltage is greater than or equal to the first threshold and the output voltage is less than the second threshold.3. The voltage-regulating circuit according to claim 1 , wherein the first assembly comprising the switch connected in series with the voltage regulator is formed by:a first transistor, the collector of which is connected to the input terminal, and the emitter of which is connected to the output terminal,a first resistor, a first end of said first resistor being connected to the base of the first transistor, a second end of the first resistor being connected to the collector of the first transistor, anda first voltage reference, the anode of which is connected to the reference terminal and the cathode of which is connected to the base of the first transistor.4. The voltage-regulating circuit according to claim 3 , wherein the amplitude of the output voltage is set by the reference voltage delivered by the first voltage reference.5. The voltage-regulating circuit according to claim 3 , wherein the first comparing circuit is formed from an NPN bipolar second transistor claim 3 , the collector of which is connected to the base of the first transistor and the base of which is connected to a first end of a second assembly formed by a second resistor connected in series with a second voltage reference claim 3 , a second end of the second assembly being connected to the input terminal claim 3 , the anode of the second voltage reference being oriented toward the base ...

LOW INPUT VOLTAGE BOOST CONVERTER WITH PEAK INDUCTOR CURRENT CONTROL AND OFFSET COMPENSATED ZERO DETECTION

The low input voltage boost converter with peak inductor current control and offset compensated zero detection provide a boost converter scheme to harvest energy from sources with small output voltages. Some embodiments described herein includes a thermoelectric boost converter that combines an Icontrol scheme with offset compensation and duty cycled comparators to enable energy harvesting from TEG inputs as low as 5 mV to 10 mV, and the peak inductor current is independent to first order of the input voltage and output voltage. A control circuit can be configured to sample the input voltage (V) and then generate a pulse with a duration inversely proportional to Vso as to control the boost converter switches such that a substantially constant peak inductor current is generated. 123-. (canceled)24. A method to control inductor current during boost conversion , comprising:receiving and sampling an input voltage;generating a control signal having an amplitude proportional to the square of a magnitude of the input voltage and having a pulse duration proportional to an inverse of the magnitude of the input voltage; andsending the control signal to a boost converter switch to activate a boost converter such that the boost converter generates an inductor current proportional to the square of the input voltage, a peak inductor current being substantially first-order independent of the input voltage.25. The method of claim 24 , further comprising:generating an output voltage when the boost converter switch is activated.26. The method of claim 24 , wherein the peak inductor current is substantially first-order independent of an output voltage generated by the boost converter claim 24 , the peak inductor current remains substantially constant when the boost converter switch is activated.27. The method of claim 24 , wherein the control signal is a first control signal claim 24 , the method further comprising:generating a second control signal that is configured to deactivate a ...

Constant On-time Buck Converter with Improved Transient Response

A COT (constant on-time) buck converter includes a first transistor, a second transistor, a driver circuit, an inductor, a first resistor, a second resistor, a capacitor, a load, and a feedback loop circuit. The feedback loop circuit includes a first switch, a second switch, an error amplifier, a comparator, a frequency locked loop circuit, an inverter and a COT logic circuit. The COT buck converter is able to improve DC (direct-current) regulation efficiency and transient response time. 1. A COT (constant on-time) buck converter comprising: a first terminal for receiving an input voltage;', 'a second terminal coupled to a switch node; and', 'a control terminal;, 'a first transistor comprising a first terminal coupled to the switch node;', 'a second terminal couple to a voltage ground; and', 'a control terminal;, 'a second transistor comprisinga driver circuit coupled to the control terminal of the first transistor and the control terminal of the second transistor, and configured to control the first transistor and the second transistor; a first end coupled to the switch node; and', 'a second end coupled to an output node;, 'an inductor comprising a first end coupled to the output node; and', 'a second end coupled to a feedback node;, 'a first resistor comprising a first end coupled to the feedback node; and', 'a second end coupled to the voltage ground;, 'a second resistor comprising a first end coupled to the output node; and', 'a second end coupled to the voltage ground;, 'a capacitor comprising a first end coupled to the output node; and', 'a second end coupled to the voltage ground; and, 'a load comprising [ a first terminal coupled to the feedback node;', 'a second terminal; and', 'a control terminal;, 'a first switch comprising, a first terminal coupled to the second terminal of the first switch;', 'a second terminal; and', 'a control terminal;, 'a second switch comprising, a negative input terminal coupled to the second terminal of the first switch;', 'a ...

Slope Compensation with Adaptive Slope

The disclosure provides for a slope voltage compensation circuit with an adaptive slope compensation method, in a DC-DC switching converter operating in current control mode, at duty cycles greater than 50%. The proposed solution allows for the dynamic range of useful operation to be extended, lowering the slope voltage compensation at the beginning of the cycle, and then increasing the compensation as 50% duty cycle is achieved. This method is based on voltage control instead of time, and a second phase of a clock is not required.

POWER FACTOR CORRECTION CIRCUIT, CONTROL METHOD AND CONTROLLER

A power factor correction circuit can include: a power meter configured to measure THD at an input port; a switching-type regulator that is controllable by a switching control signal in order to adjust a power factor of an input signal thereof; and a controller configured to generate the switching control signal to control the switching-type regulator to perform power factor correction, where the controller minimizes the THD by adjusting a current reference signal according to a measured THD, and the current reference signal represents an expected inductor current of the switching-type regulator. 1. A power factor correction circuit , comprising:a) a power meter configured to measure total harmonic distortion (THD) at an input port;b) a switching-type regulator that is controllable by a switching control signal in order to adjust an inductor current of said switching-type regulator to perform power factor correction; andc) a controller configured to generate said switching control signal to control said switching-type regulator, wherein said controller reduces said THD by adjusting a current reference signal according to a measured THD, and said current reference signal represents an expected inductor current of said switching-type regulator.2. The power factor correction circuit of claim 1 , wherein said controller is configured to inversely superimpose at least one predetermined harmonic component on said current reference signal to adjust said current reference signal.3. The power factor correction circuit of claim 2 , wherein said controller is configured to reduce said THD by adjusting the amplitude ratio of each harmonic component according to said measured THD.4. The power factor correction circuit of claim 3 , wherein said controller is configured to increment said amplitude ratio of each harmonic component in a predetermined sequential order from zero until said measured THD no longer decreases claim 3 , in order to minimize said THD.5. The power factor ...

Voltage Conversion Circuit and Method, and Multiphase Parallel Power System

A voltage conversion circuit and method, and a multiphase parallel power system, where in the voltage conversion circuit, a feedback circuit provides a frequency-controllable feedback ripple signal. Therefore, the voltage conversion circuit has a controllable operating frequency, and a frequency requirement of a load may be met. Compensation does not need to be performed in a hysteresis mode, and therefore the hysteresis mode has a fast-speed response. The operating frequency is fixed. Therefore, the voltage conversion circuit in the embodiments may be applied to the multiphase parallel power system such that the multiphase parallel power system is applicable to an application scenario with a large load current. 1. A voltage conversion circuit comprising: a power transistor;', 'a first energy storage element coupled to the power transistor; and', 'a second energy storage element coupled to the power transistor; and, 'a voltage conversion subcircuit comprising [ sample a direct current voltage at a coupling end of the first energy storage element and the second energy storage element; and', 'output a first signal;, 'a sampling and amplification circuit configured to, sample the direct current voltage at the coupling end;', 'obtain a sample signal;', 'combine the sample signal with a triangular wave signal; and', 'output a second signal; and, 'a feedback circuit configured to, compare the first signal with the second signal; and', 'generate a pulse width modulated (PWM) signal, the PWM signal controlling conduction or cutoff of the power transistor., 'a comparator circuit configured to], 'a feedback loop coupled to the voltage conversion subcircuit and comprising2. The voltage conversion circuit of claim 1 , wherein the triangular wave signal and the PWM signal are both frequency-controllable claim 1 , and the second signal is a frequency-controllable feedback ripple signal.3. The voltage conversion circuit of claim 2 , wherein the feedback circuit comprises:a ...

CONTROL CIRCUIT, CONTROL METHOD AND SWITCHING POWER SUPPLY THEREOF

A control circuit for generating a switching control signal to control switching operations of a power switch in a power stage circuit, can include: a first control loop configured to receive a first voltage feedback signal, and to generate a first compensation signal; a voltage regulating circuit configured to receive an output voltage signal of the power stage circuit, and to generate a second compensation signal according to a difference between an output voltage signal of the power stage circuit during different time periods; and control and driving circuit configured to receive the first and second compensation signals and a sense voltage signal that represents a current through an inductor of the power stage circuit, and to generate an OFF signal, and a switching control signal according to the OFF signal and an ON signal. 1. A control circuit for generating a switching control signal to control switching operations of a power switch in a power stage circuit , the control circuit comprising:a) a first control loop configured to receive a first voltage feedback signal, and to generate a first compensation signal;b) a voltage regulating circuit configured to receive an output voltage signal of said power stage circuit, and to generate a second compensation signal according to a difference in said output voltage signal between first and second operating time periods of said power stage circuit, wherein no current is provided to a load of said power stage circuit during said second operating time period; andc) a control and driving circuit configured to receive said first and second compensation signals and a first sense voltage signal that represents a current through an inductor of said power stage circuit, and to generate a switching control signal in accordance with said first compensation signal when in said first operating time period, and in accordance with said second compensation signal when in said second operating time period.2. The control circuit of ...

VOLTAGE CONVERSION DEVICE AND APPARATUS

A voltage conversion device can selectively switch between and perform voltage control and current control of a voltage conversion unit in a suitable manner in which output characteristics of a power source are reflected. A control unit () of the voltage conversion device () selectively switches the control mode of the voltage conversion unit () to a current control mode or a voltage control mode on the basis of current-voltage characteristics of the power source () and performs a control process of each control mode. The power source () has current-voltage characteristics such that the output voltage changes according to the output current and such that a rate of change of the output voltage with respect to a change of the output current changes according to the output current. 1. A voltage conversion device comprising:a voltage conversion unit connected to a power source having current-voltage characteristics such that an output voltage of the power source changes according to an output current thereof and such that a rate of change of the output voltage with respect to a change of the output current changes according to the output current, the voltage conversion unit being configured to be able to output power obtained by converting a voltage of power input from the power source; anda control unit configured to be able to selectively perform a control process of a current control mode in which the voltage conversion unit is operated to control an input current or an output current of the voltage conversion unit, and a control process of a voltage control mode in which the voltage conversion unit is operated to control an input voltage or an output voltage of the voltage conversion unit,wherein the control unit is configured to selectively switch between the current control mode and the voltage control mode in a preset manner on the basis of the current-voltage characteristics and to perform a control process of each of the control modes.2. The voltage conversion ...

Power Adapter, Cable, and Charger

A power adapter, a cable, and a charger. The power adapter includes an output port, a comparator circuit, and a voltage control and shaping circuit. The output port includes a voltage output terminal, a signal feedback terminal, a first ground terminal, and a second ground terminal. The comparator circuit is electrically connected to the signal feedback terminal, and is configured to compare a reference voltage with a charging input voltage of a to-be-charged device that is fed back by the signal feedback terminal to obtain a comparison voltage and output the comparison voltage to the voltage control and shaping circuit 1. A power adapter comprising:an output port comprising a first voltage output terminal, a first signal feedback terminal, first ground terminal, and a second ground terminal;a comparator circuit electrically coupled to the first signal feedback terminal; anda voltage control and shaping circuit electrically coupled to both the first voltage output terminal and the comparator circuit; compare a reference voltage with a charging input voltage of a to-be-charged device that is fed back by the first signal feedback terminal; to obtain a comparison voltage; and', 'output the comparison voltage to the voltage control and shaping circuit;, 'wherein the comparator circuit is configured to process an input alternating current signal to generate a charging output voltage,', 'determine a compensation for the charging output voltage by using the comparison voltage input by the comparator circuit; and', 'output, by using the first voltage output terminal, a charging output voltage obtained after compensation so as to charge the to-be-charged device, and wherein the reference voltage is a rated charging voltage of the to-be-charged device., 'wherein the voltage control and shaping circuit is configured to2. The power adapter according to claim 1 , wherein the first signal feedback terminal is disposed at one end of the first voltage output terminal claim 1 , and ...

REFERENCE VOLTAGE GENERATOR WITH ADAPTIVE VOLTAGE AND POWER CIRCUIT

There is provided a reference voltage generator for providing an adaptive voltage. The reference voltage generator includes a steady current source and a PMOS transistor and an NMOS transistor cascaded to each other. A reference voltage provided by the reference voltage generator is determined by gate-source voltages of the PMOS transistor and the NMOS transistor. As said gate-source voltages vary with the temperature and manufacturing process, the reference voltage forms a self-adaptive voltage. 1. A reference voltage generator , comprising:a steady current source configured to provide a steady current;a PMOS transistor, a source electrode of the PMOS transistor being configured to receive the steady current; andan NMOS transistor, a drain electrode of the NMOS transistor being electrically connected to a drain electrode of the PMOS transistor at a node,wherein a reference voltage provided by the reference voltage generator is outputted at the source electrode of the PMOS transistor,gate electrodes of the PMOS transistor and the NMOS transistor are connected to the node such that the drain and gate electrodes of the PMOS transistor and the drain and gate electrodes of the NMOS transistor are connected together, andat least one additional PMOS transistor or at least one additional NMOS transistor is further coupled between the drain electrodes of the NMOS transistor and the PMOS transistor.2. The reference voltage generator as claimed in claim 1 , wherein the steady current provided by the steady current source is adjustable.3. The reference voltage generator as claimed in claim 1 , wherein the steady current source is provided by a bandgap reference voltage source.4. The reference voltage generator as claimed in claim 1 , wherein a source electrode of the NMOS transistor is coupled to a ground voltage or a constant voltage.5. The reference voltage generator as claimed in claim 1 , wherein a plurality of other PMOS transistors or a plurality of other NMOS ...

CONTROL CIRCUIT FOR INTERLEAVED SWITCHING POWER SUPPLY

In one embodiment, a control circuit configured for an interleaved switching power supply, can include: (i) a feedback compensation signal generation circuit configured to sample an output voltage of the interleaved switching power supply, and to generate a feedback compensation signal; (ii) a first switch control circuit configured to compare a voltage signal indicative of an inductor current in the first voltage regulation circuit against the feedback compensation signal, and to control a first main power switch in the first voltage regulation circuit; and (iii) a second switch control circuit configured to turn on a second main power switch in the second voltage regulation circuit after half of a switching cycle after the first main power switch is turned on, and to regulate an on time of the second main power switch. 1. A control circuit configured for an interleaved switching power supply having first and second voltage regulation circuits coupled in parallel , the control circuit comprising:a) a feedback compensation signal generation circuit configured to sample an output voltage of said interleaved switching power supply, and to generate a feedback compensation signal;b) a first switch control circuit configured to compare a voltage signal indicative of an inductor current in said first voltage regulation circuit against said feedback compensation signal, and to turn on a first main power switch in said first voltage regulation circuit, and then to turn off said first main power switch after a predetermined time, in response to said voltage signal being equal to said feedback compensation signal; andc) a second switch control circuit configured to turn on a second main power switch in said second voltage regulation circuit after half of a switching cycle after said first main power switch is turned on, and to regulate an on time of said second main power switch in response to a comparison of inductor current average values of inductor currents of said two ...

Hysteresis control of a dc-dc converter

Method and apparatus for controlling the hysteresis of an output current from a DC-DC converter ( 3 ) to a default value ( 19 ) for an average output current and within a hysteresis range ( 11 ), wherein the output current ( 6 ) is measured and is compared with a first reference value and a second reference value, wherein a switch ( 7 ) of the DC-DC converter ( 3 ) is changed over at the limits of the hysteresis range ( 11 ) on the basis of a first reference time ( 20 ), at which the output current ( 6 ) reaches the first reference value, and a second reference time ( 24 ), at which the output current reaches the second reference value, wherein the switch ( 7 ) is changed over with a time delay after the second reference time ( 24 ), and wherein the time delay is selected on the basis of a time difference between the first reference time ( 20 ) and the second reference time ( 24 ) in such a manner that a period of time, during which the output current ( 6 ) is higher than the default value ( 19 ), and a period of time, during which the output current ( 6 ) is lower than the default value ( 19 ), are compensated for.

MONITORING OF A DC VOLTAGE VALUE WITH RESPECT TO SEVERAL VOLTAGE LEVELS

A method includes selecting at least one first voltage that defines subsets of DC voltages from among an ordered set of DC voltages, comparing the first voltage with a DC reference voltage, selecting one of the subsets based on a result of the comparing, and comparing each voltage of the selected subset with the reference voltage. 1. A method comprising:selecting at least one first voltage from among an ordered set of DC voltages, the at least one first voltage defining subsets of DC voltages;comparing the first voltage with a DC reference voltage;selecting one of the subsets based on a result of the comparing; andcomparing each voltage of the selected subset with the reference voltage.2. The method of claim 1 , wherein the steps of selecting the at least one first voltage claim 1 , comparing the first voltage with the DC reference voltage and selecting one of the subsets are repeated before comparing each voltage of the selected subset.3. The method of claim 2 , where the steps are repeated recursively.4. The method of claim 2 , wherein comparing each voltage of the selected subset comprises comparing each voltage of the subset selected at the last iteration of repeated steps.5. The method of claim 2 , wherein the steps are repeated until the at least one first voltage comprise at most one voltage.6. The method of claim 1 , further comprising determining two of the DC voltages surrounding the reference voltage claim 1 , based on results of comparing the first voltage with the DC reference voltage and comparing each voltage of the selected subset with the reference voltage.7. The method of claim 6 , further comprising estimating a level of each of the DC voltages based on the reference voltage and on the two DC voltages surrounding the reference voltage.8. The method of claim 6 , wherein the DC voltages are obtained from a main DC voltage claim 6 , the method further comprising estimating the value of the main DC voltage with respect to voltage levels that are each ...

METHODS AND APPARATUS TO START CONVERTERS INTO A PRE-BIASED VOLTAGE

Methods, apparatus, systems and articles of manufacture are disclosed to start converter into a pre-biased voltage. The disclosed methods, apparatus, systems and articles of manufacture provide an apparatus comprising: an error amplifier including a feedback network and a differential difference amplifier (DDA), the DDA coupled to a power converter, a voltage generator, and the feedback network coupled to the third input of the DDA, the fourth input of the DDA, and the output of the DDA; a multiplexer coupled to the voltage generator, the second input of the DDA, and the first input of the DDA; a first switch coupled in parallel to the feedback network; a second switch coupled to a delay cell and an oscillator; and a trigger including an output, the trigger coupled to the voltage generator, the power converter, and the output of the trigger coupled to the multiplexer, first switch, and the second switch. 1. An apparatus comprising:a differential difference amplifier to control a duration of a delay cell based on a first voltage level at a first output of a voltage generator;a first switch coupled to the differential difference amplifier;a multiplexer coupled to the differential difference amplifier, the first switch and the multiplexer to configure the differential difference amplifier;a second switch coupled to the delay cell to be enable the delay cell; anda trigger coupled to a second voltage node, an output of a power converter, the differential difference amplifier, the first switch, and the second switch, the trigger to, in response to a second voltage level at a second output of the voltage generator being within a threshold difference of an output voltage level at the output of the power converter, configure the first switch, the multiplexer, and the second switch to enable the differential difference amplifier to control the power converter based on the output voltage level and the second voltage level.2. The apparatus of claim 1 , including a delay-based ...

CIRCUIT DEVICE, POWER SUPPLY DEVICE, AND ELECTRONIC APPARATUS

A circuit device includes a pulse signal output circuit and a driving circuit. The pulse signal output circuit, when a detection voltage has decreased below a reference voltage, changes a pulse signal to an active level at which a switching element is turned on. The pulse signal output circuit, after the detection voltage has decreased below the reference voltage, performs monitoring as to whether or not the detection voltage has exceeded the reference voltage, and upon detecting that the detection voltage has exceeded the reference voltage, changes the pulse signal to an inactive level at which the switching element is turned off. The driving circuit outputs a driving signal based on the pulse signal to the switching element. 1. A circuit device comprising:a pulse signal output circuit configured to perform comparison between a detection voltage and a reference voltage, the detection voltage being based on an output voltage or an output current of a power supply circuit that supplies power to a load through a switching element to which an input voltage is input, and output a pulse signal based on a result of the comparison; anda driving circuit configured to output a driving signal based on the pulse signal to the switching element,wherein the pulse signal output circuit,when the detection voltage has decreased below the reference voltage, changes the pulse signal to an active level at which the switching element is turned on, andafter the detection voltage has decreased below the reference voltage, performs monitoring as to whether or not the detection voltage has exceeded the reference voltage, and upon detecting that the detection voltage has exceeded the reference voltage, changes the pulse signal to an inactive level at which the switching element is turned off.2. The circuit device according to claim 1 ,wherein the pulse signal output circuit,when the detection voltage has decreased below the reference voltage, after setting a non-monitoring period in which ...

Switched Mode Power Supply Circuit

A switched mode power supply circuit includes a switching converter receiving an input voltage and generating an output voltage from the input voltage in accordance with a switching signal. A switching controller unit is configured to generate the switching signal in accordance with a control parameter set such that the output voltage matches a set-point. 1. A switched mode power supply circuit comprising:a switching converter receiving an input voltage and generating an output voltage from the input voltage in accordance with a switching signal;a switching controller unit configured to generate the switching signal in accordance with a control parameter set such that the output voltage approximately matches a set-point that is set in accordance with a selection signal; anda detection circuit configured to detect a change of the set-point and to signal the changed set-point to the switching controller unit,wherein the switching controller unit is further configured to update the control parameter set in response to a detected change of a set-point value.2. The switched mode power supply circuit of claim 1 , further comprising a voltage controller that receives the set-point and a signal representing the output voltage claim 1 , the voltage controller being configured to generate a feedback signal based on the set-point and the signal representing the output voltage.3. The switched mode power supply circuit of claim 2 , wherein the feedback signal is supplied to the switching controller unit via a galvanically isolating signal path.4. The switched mode power supply circuit of claim 1 ,wherein the detection circuit is configured to receive the selection signal and to forward it to the switching controller unit via a first galvanically isolating signal path; andthe switching controller unit being configured to update the control parameter set in accordance with the selection signal received via the first galvanically isolating signal path.5. The switched mode power ...

CONTROL CIRCUIT OF SWITCHING POWER-SUPPLY DEVICE AND SWITCHING POWER-SUPPLY DEVICE

A control circuit of a switching power-supply device that converts a first DC voltage supplied from an input power source to a second DC voltage, includes: a first A/D converter that converts the second DC voltage into a first digital value, in response to a sampling clock depending on a first sampling clock and a second sampling clock; a control signal generation unit that generates a control signal for controlling on-and-off of the switching element based on of a difference between the first digital value and a target value; a regeneration completion sensing unit that senses completion of regeneration of the inductor and outputs a regeneration completion signal; and a sampling clock generation unit that: generates the first sampling clock, in response to the control signal to turn on the switching element, and generates the second sampling clock, in response to the regeneration completion signal. 1. A control circuit of a switching power-supply device that turns on-and-off a switching element connected to an inductor , converts a first DC voltage supplied from an input power source to a second DC voltage , and outputs the second DC voltage , comprising:a first A/D converter that converts the second DC voltage into a first digital value, in response to a first sampling clock or second sampling clock;a control signal generation circuit that generates a control signal for controlling on-and-off of the switching element based on difference between the first digital value and a target value;a regeneration completion sensing circuit that senses completion of regeneration of the inductor and outputs a regeneration completion signal; and generates the first sampling clock, in response to the control signal to turn on the switching element, and', 'generates the second sampling clock, in response to the regeneration completion signal., 'a sampling clock generation circuit that2. The control circuit of the switching power-supply device according to claim 1 , wherein the ...

POWER SUPPLY APPARATUS SUPPRESSING TRANSIENT VOLTAGE

A power supply apparatus () suppressing a transient voltage is applied to an input voltage (). The power supply apparatus () includes a power supply circuit (), a feedback signal generation circuit () and a feedback signal control circuit (). If the power supply circuit () stops receiving the input voltage (), the feedback signal control circuit () controls the feedback signal generation circuit () to discharge so that the feedback signal generation circuit () controls the power supply circuit () to decrease an output voltage (), so that when the power supply circuit () receives the input voltage () again, the power supply circuit () avoids generating an output overvoltage condition for the output voltage (). 1105010. A power supply apparatus () suppressing a transient voltage and applied to an input voltage () , the power supply apparatus () comprising:{'b': '20', 'a power supply circuit ();'}{'b': 30', '20, 'a feedback signal generation circuit () electrically connected to the power supply circuit (); and'}{'b': 40', '20', '30, 'a feedback signal control circuit () electrically connected to the power supply circuit () and the feedback signal generation circuit (),'}{'b': 20', '50', '40', '30', '30', '20', '60', '20', '50', '20', '60, 'wherein if the power supply circuit () stops receiving the input voltage (), the feedback signal control circuit () is configured to control the feedback signal generation circuit () to discharge so that the feedback signal generation circuit () is configured to control the power supply circuit () to decrease an output voltage (), so that when the power supply circuit () receives the input voltage () again, the power supply circuit () is configured to avoid generating an output overvoltage condition for the output voltage ().'}2102021040. The power supply apparatus () in claim 1 , wherein the power supply circuit () comprises an auxiliary voltage generation sub-circuit () electrically connected to the feedback signal control circuit ...

CONTROL CIRCUIT FOR AN INTERLEAVED SWITCHING POWER SUPPLY

In one embodiment, a control circuit configured for an interleaved switching power supply having first and second voltage conversion circuits, can include: a feedback compensation signal generation circuit that generates a feedback compensation signal; a first power switch control circuit that activates a first on signal when a first voltage signal that represents an inductor current of the first voltage conversion circuit is less than the feedback compensation signal, a first power switch of the first voltage conversion circuit being turned on based on the first on signal, and turned off after a predetermined time; and a second power switch control circuit that activates a second on signal after half of a switching period from a rising edge of the first on signal, and a second power switch control signal to turn on a second power switch of the second voltage conversion circuit based on the second on signal. 1. A control circuit configured for an interleaved switching power supply having first and second voltage conversion circuits , the control circuit comprising:a) a feedback compensation signal generation circuit configured to calculate and compensate an error of an output voltage of said interleaved switching power supply, and to generate a feedback compensation signal;b) a first power switch control circuit configured to activate a first on signal in accordance with said feedback compensation signal and a first voltage signal that represents an inductor current of said first voltage conversion circuit to turn on a first power switch of said first voltage conversion circuit; andc) a second power switch control circuit configured to activate a second on signal after half of a switching period from said first on signal being activated to turn on a second power switch of said second voltage conversion circuit, wherein said switching period is determined in accordance with said first on signal of previous and current switching periods.2. The control circuit of claim ...

POWER CONVERSION DEVICE, TIME SIGNAL GENERATOR AND METHOD THEREOF

A time signal generator includes a time signal circuit and a timing circuit. The time signal circuit includes a current source and a current source circuit, and has a first mode and a second mode. The time signal generator provides a first on-time signal according to the current source in the first mode. The timing circuit is connected to the time signal circuit, and includes a first timing circuit. When the timing circuit counts to a first predetermined time, the first timing circuit provides a first control signal to the current source circuit, such that the time signal generator provides a second on-time signal according to the current source and the current source circuit in the second mode. A width of the second on-time signal is less than a width of the first on-time signal. 1. A time signal generator , comprising:a time signal circuit, comprising a current source and a current source circuit, and having a first mode and a second mode, wherein the time signal generator provides a first on-time signal according to the current source in the first mode; anda timing circuit, connected to the time signal circuit, and comprising a first timing circuit, wherein when the timing circuit counts to a first predetermined time, the first timing circuit provides a first control signal to the current source circuit, such that the time signal generator provides a second on-time signal and a third on-time signal in sequence according to the current source and the current source circuit in the second mode, wherein a width of the second on-time signal is smaller than a width of the first on-time signal, and a width of the third on-time signal is reversely proportional to an interval time between the second on-time signal and the third on-time signal,wherein the timing circuit further comprises a second timing circuit, and when the timing circuit counts to a second predetermined time, the second timing circuit generates a cut-off signal such that the time signal generator ...

VARIABLE FREQUENCY DRIVE WITH INTEGRAL MACHINE CONDITION MONITORING AND PROTECTION SYSTEM

The present invention provides a variable frequency drive (VFD) which has an integral machine monitoring and protection system to allow continual adjustment of VFD parameters for the optimized operation of a machine. The invention also includes a mentoring and control system provided with self-learning software module. This software module will collect real-time data and stores in the local data-base. When sufficient data is collected the system can be put into the fully or semi-automatic mode. In automatic mode, the system will automatically make decision and adjust operating parameters to operate safely. In semi-automatic mode the system will send new adjustment values/set points for operator to make a decision. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. A method of using a variable frequency drive apparatus for controlling , monitoring , and adjusting the operation of a variable frequency drive as it drives the motor of a machine , comprising the steps of:pressing a start button positioned on said variable frequency drive apparatus;setting operation values to be adhered to by said motor of said machine;comparing said operational values with real-time machine reaching values; in the event said motor is not operating within said operational values, adjusting the operation of said variable frequency drive; or', 'alternatively, shutting down said motor of said machine for maintenance., 'determining whether said motor is operating within the parameter of said set operational values; and'}8. The method of using a variable frequency drive apparatus for controlling claim 7 , monitoring claim 7 , monitoring claim 7 , and adjusting the operation of a variable frequency drive of claim 7 , wherein setting said operation values is performed automatically using benchmark values stored on an existing database.9. The method of using a variable frequency drive apparatus for controlling claim 7 , monitoring claim 7 , monitoring claim 7 , and ...

POWER CONVERSION DEVICE

A power conversion device includes a switched-mode power supply (SMPS), a photocoupler and a controller. The SMPS receives a pulse width modulation (PWM) signal from the controller to generate a DC output voltage related to a DC input voltage. The photocoupler generates a reference voltage signal based on the DC output voltage. The controller adjusts at least one of a duty cycle or a frequency of the PWM signal based on the reference voltage signal. 1. A power conversion device , comprising:a switched-mode power supply disposed to receive a direct current (DC) input voltage and a pulse width modulation (PWM) signal, and having a first output terminal and a second output terminal, said switched-mode power supply configured to generate a DC output voltage between said first and second output terminals based on the DC input voltage and the PWM signal; a first resistor and a light emitting diode coupled in series between said first and second output terminals of said switched-mode power supply;', 'a second resistor having a first terminal that provides the reference voltage signal, and a second terminal; and', 'a phototransistor disposed to receive light emitted by said light emitting diode, and having a first terminal, and a second terminal that is coupled to said first terminal of said second resistor; and, 'a photocoupler coupled to said first and second output terminals of said switched-mode power supply for receiving the DC output voltage therefrom, and configured to generate a reference voltage signal based on the DC output voltage, said photocoupler includinga controller coupled to said first terminal of said second resistor for receiving the reference voltage signal therefrom, and coupled to said switched-mode power supply, said controller configured to generate the PWM signal, and to adjust at least one of a frequency or a duty cycle of the PWM signal based on a relationship between the reference voltage and a predetermined voltage value.2. The power conversion ...

Voltage Regulation System and Method for Providing Power to a Load

A voltage regulation system for providing power to a load is provided. The voltage regulation system includes a voltage regulator operable to: set an operating voltage of the load at a first voltage level which corresponds to a first voltage requirement of the load; receive a second voltage requirement of the load which is different than the first voltage requirement; produce a voltage ramp signal which transitions from the first voltage level to a second voltage level which corresponds to the second voltage requirement at a defined ramp rate; and ramp the operating voltage from the first voltage level to the second voltage level based on the voltage ramp signal and at the same ramp rate as the voltage ramp signal, but with a lag between the voltage ramp signal and the ramp in the operating voltage. 1. A voltage regulation system for providing power to a load , the voltage regulation system comprising a voltage regulator operable to:set an operating voltage of the load at a first voltage level which corresponds to a first voltage requirement of the load;receive a second voltage requirement of the load which is different than the first voltage requirement;produce a voltage ramp signal which transitions from the first voltage level to a second voltage level which corresponds to the second voltage requirement at a defined ramp rate; andramp the operating voltage from the first voltage level to the second voltage level based on the voltage ramp signal and at the same ramp rate as the voltage ramp signal, but with a lag between the voltage ramp signal and the ramp in the operating voltage.2. The voltage regulation system of claim 1 , wherein the ramp rate is based on at least one of decoupling capacitance claim 1 , peak current capability and operating frequency of the voltage regulator.3. The voltage regulation system of claim 1 , wherein the ramp rate is different for down-ramps in the operating voltage than for up-ramps in the operating voltage.4. The voltage ...

SWITCHING REGULATOR AND CONTROLLER THEREOF

A switching regulator includes an inductor connected to an output terminal of the switching regulator, a switching circuit configured to supply a current from an input terminal of the switching regulator to the inductor in response to an activated control signal, and an RC circuit including a sense resistor and a sense capacitor and connected to the inductor in parallel, the sense resistor and the sense capacitor being connected to each other in series at a feedback node. 1. A controller of a switching regulator , wherein the switching regulator includes an inductor connected to at least one output terminal of the switching regulator , a switching circuit configured to supply a current from at least one input terminal of the switching regulator to the inductor based on a control signal , and an RC circuit comprising at least one sense resistor connected in series to at least one sense capacitor and a feedback node , the RC circuit connected in parallel to the inductor; and the controller comprising:a first comparator configured to generate a first comparison signal based on a voltage of the feedback node and a first reference voltage;a first counter configured to count active pulses of the first comparison signal; anda control signal generator configured to generate the control signal based on a value of an output signal of the first counter and a first reference value;a reset signal generator confirmed to generate a reset signal based on the first comparison signal; anda reset switch configured to reset the sense capacitor by interconnecting both ends of the sense capacitor based on the reset signal,wherein the sense capacitor is reset more frequently than the first counter.2. The controller of claim 1 , wherein the first reference value is inversely proportional to a capacitance of the sense capacitor.3. The controller of claim 1 , further comprising:a second comparator configured to generate a second comparison signal based on the voltage of the feedback node and ...

Switching control circuit and control method

A switching control circuit for controlling a multi-channel switching circuit can include: a logic control circuit that receives an external operation signal, and generates an enable signal, a trigger signal, and an order signal; a reference voltage regulation circuit that receives the enable signal, the trigger signal, the order signal, and a plurality of input voltage signals, and generates an adjustable reference voltage signal, where the reference voltage regulation circuit is also configured to select one of the plurality of input voltage signals based on the order signal; a feedback control circuit that receives the reference voltage signal, the plurality of input voltage signals, and the output voltage signal, and generates a feedback control signal; and a channel selection circuit that receives the order signal and the feedback control signal, and generates switching control signals to control switching operations of the multi-channel switching circuit.

REGULATOR LIGHT LOAD CONTROL TECHNIQUES

Techniques for operating a power supply under light load conditions are provided. In an example, a frequency of an oscillator can be adjusted based on a feedback signal indicative of a voltage error of the power supply when the feedback signal falls below a first threshold. In certain examples, a peak inductor current command can be kept constant and a slope compensation ramp can be based on the frequency of the oscillator when the feedback signal falls below the first threshold. In some examples, various circuits of the power supply can be disabled when the feedback signal further falls below a second threshold. The feedback signal can be indicative of a load on the power supply. 1. A switched-mode power delivery method of supplying current at a regulated voltage to a load , the method comprising:in response to a representation including an integrated voltage error of the regulated voltage exceeds a first threshold, switching an inductive switching circuit at a first switching frequency in a first continuous switching mode, to supply the current to the load;in response to the representation including the integrated voltage error being less than the first threshold indicating a relatively light load condition, operating the inductive switching circuit in a second continuous switching mode to supply the current to the load, the second switching mode switching at a second switching frequency to supply the current to the load;varying a ramp rate of a slope compensation ramp signal, responsive to varying of the second switching frequency during the second continuous switching mode; andcontrolling an inductor peak current based at least on the slope compensation ramp signal; andcontrolling the inductor peak current to switch the inductor switching circuit at a constant target peak current during the second continuous switching mode without a discontinuity in the target peak current in switching between the first continuous switching mode and the second continuous ...

AVERAGE CURRENT AND FREQUENCY CONTROL

Apparatuses, systems and methods for regulating the output currents of a power supply at a target output current include a buck converter module operably connected to a power source and a load. A first switch couples the power source to the buck converter module during a first period of a given operating cycle, while the buck converter module stores and provides electrical power to the load. During a second period, the buck converter may discharge the electrical power stored during the first period. A current sensor senses the currents during at least one of the first period and the second period and, over the operating cycle, the switching is adjusted so the average output current equals the target output current. Adjustments to the first and second period durations result in maximum and a minimum currents symmetrically disposed about the average current provided to the load during the operating cycle. 1. A power regulating device comprising:{'sub': 'OFF', 'a buck converter module configured, during an OFF period (t) of a current operating cycle (n), to provide a decreasing output current to a load until a minimum current threshold is reached.'}2. The power regulating device of claim 1 , further comprising: sense an output voltage of the buck converter module;', 'determine the output current based on the output voltage; and', {'sub': 'OFF', 'end the OFF period (t) when the output current reaches the minimum current threshold.'}], 'a driver module, coupled to the buck converter module, configured to3. The power regulating device of claim 2 ,{'sub': 'OFF', 'wherein the output voltage during the OFF period (t) corresponds to a decreasing ramp function.'}4. The power regulating device of claim 2 ,{'sub': OFF', 'D, 'wherein the OFF period (t) includes a recover period (t) followed by a second period during which the output current corresponds to a decreasing ramp function.'}5. The power regulating device of claim 2 ,{'sub': 'ON', 'wherein, during an ON period (t) of the ...

Power converter and associated electrical grid

A power converter comprises a power structure receiving, as input, an AC voltage comprising at least one phase and delivering, as output, a DC voltage, the output power of the power structure being regulated by a multiplier receiving, as input, a current control signal and a signal proportional to the output voltage of the power structure, the current control signal being generated by a current correction module receiving, as input, a signal proportional to the difference between the output current of the power structure and a current setpoint signal. Electrical network comprising such a power conversion circuit is also provided.

VOLTAGE REGULATOR WITH AN ADAPTIVE OFF-TIME GENERATOR

A voltage regulator circuit includes a first transistor, an inductor, and a diode. The inductor connects to the diode at a switch node. The voltage converter produces an output voltage that is larger than an input voltage. The first transistor has on and off states and electrically couples a node to ground when in the on state. An error amplifier circuit generates an error signal based on a difference between a reference voltage and a voltage indicative of the output voltage. The error signal causes the first transistor to transition from the on to the off state. An adaptive off-time generator circuit couples to the input voltage node, and generates a signal to cause the first transistor to transition from the off to the on state. The time the first transistor is in the off state is inversely proportional to the time the first transistor is in the on state. 1. A voltage regulator circuit , comprising:a voltage converter including a first transistor, an inductor, a diode, an input voltage node and an output voltage node, the inductor connected to the diode at a switch node, the voltage converter to produce an output voltage on the output voltage node that is larger than an input voltage on the input voltage node, the first transistor having an on state and an off state and the first transistor to electrically couple the switch node to ground when in the on state;an error amplifier circuit to generate an error signal based on a difference a reference voltage and a voltage indicative of the output voltage, the error signal to cause the first transistor to transition from the on state to the off state; andan adaptive off-time generator circuit coupled to the input voltage node, the adaptive off-time generator circuit generate a signal to cause the first transistor to transition from the off state to the on state, wherein a length of time the first transistor is in the off state (“off time”) is inversely proportional to a length of time the first transistor is in the on ...

APPARATUS AND METHODS FOR CONTROLLING A SWITCH MODE POWER CONVERTER USING A DUTY CYCLE STATE MACHINE

A power conversion system includes a switch mode power converter including a switch coupled to regulate an output voltage to a regulation value in response to a feedback signal. A controller is coupled to deliver a gate drive signal to the switch during an enabled control condition. The controller is further coupled to inhibit the gate drive signal to the switch during an inhibited control condition. A duty cycle state machine included in controller is coupled to adjust a duty cycle of the gate drive signal according to a plurality of discrete duty cycle states. 1. A system controller comprising: a first state during which the duty cycle is adjusted to a first value; and', 'a second state during which the duty cycle is adjusted to a second value;, 'a duty cycle state machine configured to adjust a duty cycle of a gate drive signal according to a plurality of discrete duty cycle states, the plurality of discrete duty cycle states comprisingwherein the system controller is configured to deliver the gate drive signal during an enabled control condition and to inhibit the gate drive signal during an inhibited control condition, andwherein the duty cycle state machine is configured to transition from the first state to the second state after the gate drive signal completes an enabled consecutive cycle count during the enabled control condition.2. The system controller of claim 1 ,wherein the system controller is configured to deliver the gate drive signal during the enabled control condition in response to a feedback signal indicating an output voltage is less than a regulation value, andwherein the system controller is configured to inhibit the gate drive signal during the inhibited control condition in response to the feedback signal indicating the output voltage is greater than the regulation value.3. The system controller of claim 1 , wherein the second value is greater than the first value.4. The system controller of claim 1 , wherein the enabled consecutive cycle ...

POWER CONVERSION CONTROLLER FOR ELECTRIC TRAIN

A power conversion controller for electric train in one aspect of the present disclosure includes an active current command value generator, an overhead line voltage detector, an initial value calculator, an adjustment value calculator, an upper limit value setter, and an output limiter. The output limiter outputs a reactive current command adjustment value calculated by the adjustment value calculator as a reactive current command value when the reactive current command adjustment value is equal to or lower than an upper limit value set by the upper limit value setter, and outputs the upper limit value as the reactive current command value when the reactive current command adjustment value exceeds the upper limit value. 1. A power conversion controller for electric train that is to be mounted on an electric train , the electric train being configured to receive AC power from an overhead line through which the AC power is supplied , the power conversion controller for electric train being configured to control a power converter that converts the AC power inputted from the overhead line , the power converter being configured to receive an active current command value and a reactive current command value from the power conversion controller for electric train , and to consume an active current corresponding to the active current command value and a leading reactive current corresponding to the reactive current command value , an active current command value generator configured to generate the active current command value corresponding to active power to be supplied to a load from the power converter;', 'an overhead line voltage detector configured to detect an overhead line voltage which is a voltage received from the overhead line;', 'an initial value calculator configured to calculate a reactive current command initial value which is an initial value of the reactive current command value for causing an overhead line voltage detection value to follow a voltage ...

SECONDARY SIDE CURRENT MODE CONTROL FOR A CONVERTER

A method and apparatus for secondary side current mode control of a converter are provided. In the method and apparatus, an output voltage of the converter is detected, where the converter has primary and secondary windings that are galvanically isolated in respective primary and secondary sides. A secondary control signal is generated in the secondary side based at least in part on the output voltage and a reference voltage. The secondary control signal is converted to a primary control signal provided in the primary side. The converter is driven in the primary side based at least in part on the primary control signal and a current sense signal indicative of a current flowing through the primary winding. 1. A converter , comprising:a transformer including a primary winding in a primary power domain of a primary side of the transformer and a secondary winding in a secondary power domain of a secondary side of the transformer galvanically isolated from the primary power domain;a controller, in the secondary power domain, configured to generate a secondary control signal having a switching timing from a first state to a second state that dictates when current flow through the primary winding of the converter is switched on;an isolation stage configured to convert the secondary control signal into a primary control signal in the primary power domain; anda driving stage, in the primary side, configured to generate a driving signal for switching on the current flow through the primary winding of the converter based on the primary control signal.2. The converter of claim 1 , wherein the controller is configured to keep the secondary control signal in the first state or the second state for a duration commensurate with a desired current level of the primary winding of the converter.3. The converter of claim 1 , wherein the driving stage is configured to:determine a desired current level of the primary winding based at least in part on the primary control signal;determine ...

CONVERTER

A converter includes a transformer, a main switch, an active clamping circuit, a synchronous rectifying switch and a processing circuit. The transformer includes a primary winding and a secondary winding. The main switch is coupled to the primary winding. The active clamping circuit clamps the voltage across the main switch when it is OFF. The active clamping circuit includes an auxiliary switch. The synchronous rectifying switch is coupled to the secondary winding. The processing circuit determines whether the rectifying switch is in a main conducting period or a sub conducting period according to a first voltage signal across the rectifying switch and at least one detecting signal from the converter, and generates a driving signal to control the synchronous rectifying switch accordingly. 1. A converter comprising:a transformer comprising a primary winding, a secondary winding and a primary auxiliary winding;a passive clamping circuit, electrically couple to the primary winding in parallel;a main switch, electrically coupled to the primary winding in series;a soft switching circuit comprising an auxiliary switch and an auxiliary capacitor, wherein the auxiliary switch and the auxiliary capacitor are coupled in series to form a series branch, and the series branch is electrically coupled to the primary auxiliary winding;a synchronous rectifying switch, electrically coupled to the secondary winding in series; anda processing circuit, configured to determine whether the synchronous rectifying switch is in a main conducting period or a sub conducting period according to a first voltage signal across the synchronous rectifying switch and at least one detecting signal from the converter, and generate a driving signal to control the synchronous rectifying switch accordingly.2. The converter of claim 1 , wherein the processing circuit comprises:a delaying unit, configured to receive and delay the at least one detecting signal to output at least one sensing signal;a logic ...

DC-DC CONVERTER HAVING A SWITCH ON-TIME CONTROL LOOP WITH A SWITCHED-CAPACITOR CIRCUIT FOR ERROR-BASED ADJUSTMENT

An apparatus includes a direct-current to direct-current (DC-DC) converter having an output node and at least one electronic switch. The DC-DC converter also includes: 1) a first feedback loop configured to control a voltage at the output node by adjusting a first switching parameter of the at least one electronic switch; and 2) a second feedback loop configured to adjust a second switching parameter of the at least one electronic switch. The second feedback loop includes a switched-capacitor circuit configured to determine a threshold signal based on an error between a reference signal and a control signal for the at least one electronic switch. The second feedback loop is configured to adjust the second switching parameter based on a comparison of an on-time signal with the threshold signal. 1. A system that comprises: an output node;', 'at least one electronic switch;', 'a first feedback loop configured to control a voltage at the output node by adjusting a first switching parameter of the at least one electronic switch; and', 'a second feedback loop configured to adjust a second switching parameter of the at least one electronic switch, wherein the second feedback loop includes a switched-capacitor circuit configured to provide a threshold signal based on an error between a reference signal and a control signal for the at least one electronic switch, and wherein the second feedback loop is configured to adjust the second switching parameter based on a comparison of an on-time signal with the threshold signal., 'a direct-current to direct-current (DC-DC) converter having2. The system of claim 1 , wherein first switching parameter is a duty cycle and the second switching parameter is a switching frequency.3. The system of claim 1 , wherein the switched-capacitor circuit comprises a differential integrator and a summer circuit configured to adjust the threshold signal based on the error.4. The system of claim 3 , further comprising an RC filter at the output of the ...

TECHNOLOGIES FOR CONTROLLING AC-TO-DC CONVERTERS

Technologies for controlling AC-to-DC converters are disclosed. In one illustrative embodiment, a controller of an AC-to-DC converter measures two voltage levels of a split voltage bus of a power factor correction (PFC) circuit. The controller controls current drawn from the positive and negative terminals of the PFC circuit by a DC-to-DC converter. By controlling the current drawn from the two terminals, the controller can control the voltages on the terminals to be equal (but opposite). 1. An alternating current (AC) to direct current (DC) converter comprising:a power factor correction (PFC) circuit comprising a positive DC voltage terminal, a center DC voltage terminal, and a negative DC voltage terminal;a DC-to-DC converter; and determine an indication of a voltage difference between (i) a voltage of the positive DC voltage terminal relative to the center DC voltage terminal and (ii) a voltage of the center DC voltage terminal relative to the negative DC voltage terminal;', 'determine, based on the indication of the voltage difference, a control signal to control a current draw from the positive DC voltage terminal or the negative DC voltage terminal by the DC-to-DC converter; and', 'provide the control signal to the DC-to-DC converter to control the current draw from the positive DC voltage terminal or the negative DC voltage terminal by the DC-to-DC converter., 'a controller configured to2. The AC-to-DC converter of claim 1 , wherein to determine the control signal comprises to (i) determine claim 1 , based on the indication of the voltage difference claim 1 , a first control signal to control a current draw from the positive DC voltage terminal and (ii) determine claim 1 , based on the indication of the voltage difference claim 1 , a second control signal to control a current draw from the negative DC voltage terminal claim 1 , and wherein to provide the control signal comprises to (i) provide the first control signal to the DC-to-DC converter to control the ...

Asynchronous Clock Pulse Generation in DC-to-DC Converters

Generally speaking, a pulse generation unit can aid load transient response for a DC-to-DC converter. In some examples, a pulse generation unit is coupled to an output voltage of the DC-to-DC converter. The pulse generation unit includes a transient sensing unit and a clock augmentation unit. The transient sensing unit monitors the output of the DC-to-DC converter. When the transient sensing unit detects a load transient, the transient sensing unit generates an additional clock pulse. The clock augmentation unit augments an existing clock signal to include the additional clock pulse. 1. A circuit comprising:a converter circuit configured to generate an output voltage;a fixed frequency clock circuit configured to generate fixed frequency clock pulses, wherein an existing clock signal includes the fixed frequency clock pulses;a driver circuit configured to operate at least one switch, wherein the driver circuit operates the at least one switch in response to pulse width modulation (PWM) pulses, wherein the PWM pulses are triggered by the fixed frequency clock pulses generated by the fixed frequency clock; and a transient sensing circuit configured to monitor the output voltage of the converter circuit, and configured to generate a signal indicating that an additional clock pulse is needed, wherein the additional clock pulse is in addition to the fixed frequency clock pulses generated by the fixed frequency clock circuit; and', 'a clock augmentation circuit configured to generate an augmented clock signal, wherein the augmented clock signal includes the existing clock signal and the additional clock pulse., 'a pulse generation circuit coupled to the converter circuit, the pulse generation circuit including2. The circuit of claim 1 , wherein the additional clock pulse is triggers an additional PWM pulse.3. The circuit of claim 1 , further comprising a filter circuit.4. A circuit comprising:a converter circuit configured to produce an output voltage;a fixed frequency ...

DC-DC CONVERTER AND ORGANIC LIGHT EMITTING DISPLAY INCLUDING THE SAME

A DC-DC converter includes a first power source generator, the first power source generator including an input port and a first output port, the first power source generator being configured to receive an input power source to the input port, and being configured to generate a first power source, the first power source being output to the first output port, and a selecting unit, the selecting unit being configured to selectively transmit, to the first power source generator, one of: a feedback voltage, the feedback voltage being input from an external feedback wiring line via a feedback terminal, and a voltage of the first output port. 1. A DC-DC converter , comprising:a first power source generator, the first power source generator including an input port and a first output port, the first power source generator being configured to receive an input power source to the input port, and being configured to generate a first power source, the first power source being output to the first output port; anda selecting unit, the selecting unit being configured to selectively transmit, to the first power source generator, one of:a feedback voltage, the feedback voltage being input from an external feedback wiring line via a feedback terminal, and a voltage of the first output port.2. The DC-DC converter as claimed in claim 1 , wherein:the selecting unit is configured to calculate a voltage difference between the feedback voltage and the voltage of the first output port,the selecting unit is configured to select one of the feedback voltage and the voltage of the first output port to correspond to the calculated voltage difference, andthe selecting unit is configured to transmit the selected voltage to the first power source generator.3. The DC-DC converter as claimed in claim 2 , wherein the selecting unit includes:a calculating unit, the calculating unit being configured to calculate the voltage difference between the feedback voltage and the voltage of the first output port; ...

ADAPTIVE DUAL STAGE IDENTIFICATION CONTROL METHOD FOR A POWER STAGE OF A POWER CONVERTER

A control method is provided for a power converter configured to generate an output voltage according to a control law controlling a power stage. The method comprises a dual stage identification process for identifying parameters of the power stage. The method includes, in a first stage, identifying at least one parameter of the power stage during ramp up of the power converter and adapting the control law to the identified at least one parameter of said power stage for operating the power converter. The method further includes, in a second stage, determining a response of the power stage; identifying at least one other parameter of the power stage by characterizing the response; and further adapting the control law according to a characteristic of the response. 1. A control method for a power converter configured to generate an output voltage according to a control law controlling a power stage , the method comprising:identifying at least one parameter of a component of the power stage during ramp up of the power converter;adapting the control law to the identified at least one parameter of the component of said power stage for operating said power converter;determining a response of the power stage;identifying at least one other parameter of the power stage by characterizing the response; andfurther adapting the control law according to a characteristic of the response.2. The control method according to claim 1 , further comprising:continuously characterizing the response and continuously adapting the control law in response when operating the power converter.3. The method according to claim 1 , wherein characterizing the response comprises determining a degree of matching between the response and an objective response by filtering the response to generate a filtered response and integrating a product of the filtered response and a delayed response.4. The method according to claim 1 , wherein further adapting the control law comprises adapting the control law such ...

FEEDBACK CIRCUIT FOR REGULATION LOOPS

In some examples, a device includes an amplifier circuit configured to receive a reference voltage signal at a first input, receive a feedback signal at a second input, and generate an output signal based on the reference voltage signal and the feedback signal. In some examples, the device also includes a feedback circuit including a soft-shaper circuit that is electrically connected to the second input of the amplifier circuit. In some examples, the feedback circuit is configured to sense a voltage step in the reference voltage signal, generate a voltage step across the soft-shaper circuit approximately equal to the voltage step in the reference voltage signal in response to sensing the voltage step in the reference voltage signal, and ramp a voltage level across the soft-shaper circuit to zero after generating the voltage step across the soft-shaper circuit. 1. A device comprising: receive a reference voltage signal at the first input of the amplifier circuit;', 'receive a feedback signal at the second input of the amplifier circuit; and', 'generate an output signal based on the reference voltage signal and the feedback signal; and, 'an amplifier circuit including a first input and a second input, wherein the amplifier circuit is configured to sense a voltage step in the reference voltage signal;', 'generate a voltage step across the soft-shaper circuit approximately equal to the voltage step in the reference voltage signal in response to sensing the voltage step in the reference voltage signal; and', 'ramp a voltage level across the soft-shaper circuit to zero after generating the voltage step across the soft-shaper circuit., 'a feedback circuit including a soft-shaper circuit that is electrically connected to the second input of the amplifier circuit, wherein the feedback circuit is configured to2. The device of claim 1 , wherein the feedback circuit is configured to ramp the voltage level across the soft-shaper circuit by at least causing the voltage level ...

MULTI-PHASE POWER REGULATOR

A circuit for a multi-phase power regulator including a power stage with a first phase and a second phase, the circuit including phase management circuitry coupled to the first phase and the second phase to control the first phase and the second phase, a first comparator coupled to an output of the multi-phase power regulator to compare a value of the output of the multi-phase power regulator to a first threshold value to produce a first comparison result, and phase shedding circuitry coupled to the first comparator and the phase management circuitry to control the phase management circuitry to activate or deactivate the second phase based at least partially on the first comparison result. 1. A circuit for use in system with a multi-phase power regulator to supply power to an electrical load , the multi-phase power regulator including a power stage including a first phase and a second phase , the circuit comprising:phase management circuitry to couple to the first phase and the second phase to control the first phase and the second phase;a first comparator to couple to an output of the multi-phase power regulator to compare a value of the output of the multi-phase power regulator to a first threshold value to produce a first comparison result; andphase shedding circuitry coupled to the first comparator and the phase management circuitry to control the phase management circuitry to activate or deactivate the second phase based at least partially on the first comparison result.2. The circuit of claim 1 , further comprising a second comparator to couple to the output of the multi-phase power regulator and coupled to the phase shedding circuitry to compare the value of the output of the multi-phase power regulator to a second threshold value to produce a second comparison result claim 1 , wherein the second threshold value is less than the first threshold value.3. The circuit of claim 2 , wherein the power stage includes three or more phases claim 2 , the phase shedding ...