Abstract: An integrated circuit for a power supply circuit that includes a state-indicating circuit, which is a first or second circuit when the power supply circuit is of a non-isolated or isolated type, as the case may be. The integrated circuit including a voltage generation circuit that generates, at a first terminal, a voltage that is (1) lower than a first level, when the first circuit is coupled to the first terminal, (2) higher than a second level, when the second circuit is coupled to the first terminal, and (3) higher than the first level and lower than the second level, when no state-indicating circuit is coupled to the first terminal, and a determination circuit that determines that the power supply circuit is of the non-isolated or isolated type, when the voltage at the first terminal is lower or higher than the second level, as the case may be.

Abstract: A GaN half bridge circuit is disclosed. The circuit includes a bootstrap power supply voltage generator is configured to supply a first power voltage and includes a switch node. The circuit also includes a bootstrap transistor, a bootstrap transistor drive circuit, and a bootstrap capacitor connected to the switch node and to the bootstrap transistor. The bootstrap capacitor is configured to supply the first power voltage while the voltage at the switch node is equal to the second switch node voltage, the bootstrap transistor is configured to electrically connect the bootstrap capacitor to a power node at a second power voltage while the voltage at the switch node is equal to the first switch node voltage, and the bootstrap power supply voltage generator does not include a separate diode in parallel with the drain and source of the bootstrap transistor.

Abstract: An apparatus includes a plurality of control modules coupled to a multi-phase power converter having a plurality of power stage circuits correspondingly coupled to the plurality of control modules, where each control module includes: a first port coupled to a second port of a previous control module; a second port coupled to a first port of a next control module, and being configured to generate a transmission signal for the next control module; and where the transmission signal represents at least two types of information, and is configured to control the corresponding power stage circuit to operate sequentially.

Abstract: A DC/DC converter includes N inductors and N power modules which correspond to N phases. The N inductors each include a plurality of inductor chips that are electrically connected in parallel to each other. The plurality of inductor chips are mounted separately on a main mounting surface and a sub-mounting surface of a printed circuit board. The sub-mounting surface is opposite to the main mounting surface.

Abstract: A power converter can include at least one first power stage circuit and a second power stage circuit, where each of the at least one first power stage circuit can include: at least one power switch, configured as a main power switch; a first magnetic element; a first energy storage element configured to be coupled to a first node of the first power stage circuit together with one adjacent power stage circuit, and to be charged or discharged through the adjacent power stage circuit; and an auxiliary module configured to ensure that a current flowing through the first magnetic element is not less than zero in a current discontinuous mode, where a first terminal of the second power stage circuit is coupled to an adjacent first power stage circuit.

Abstract: This disclosure provides a multi-mode control method for an active clamp flyback converter. In the flyback converter, the controller realizes mode switching between a trailing edge non-complementary mode, a leading edge non-complementary mode, and a leading edge non-complementary Burst mode of two driving signals after comparing a detection feedback voltage with the set mode switching threshold voltages. The disclosure adopts the trailing edge non-complementary mode to reduce a circulating current of the converter, uses the leading edge non-complementary mode to replace the ordinary flyback mode to improve light load efficiency, and uses the leading-edge non-complementary Burst mode at no-load to limit a peak current of a primary side in leading-edge non-complementary Burst mode to avoid generation of audio noise, and allowing a low no-load power consumption.

Abstract: A semiconductor switch driving apparatus is configured to drive a semiconductor switch, the semiconductor switch not having a body diode and having a threshold voltage for performing switching between off and on lower than a threshold voltage of a silicon device. The semiconductor switch driving apparatus includes: a first drive voltage switching circuit configured to switch a drive voltage of the semiconductor switch to a first adjustment voltage between an off-voltage and an on-voltage, at a predetermined time immediately before a timing at which the semiconductor switch is driven from off to on; and a second drive voltage switching circuit configured to switch, after the drive voltage of the semiconductor switch has been switched by the first drive voltage switching circuit, the drive voltage of the semiconductor switch to the on-voltage at the timing at which the semiconductor switch is driven from off to on.

Abstract: An isolated power converter can include: a primary side having a primary winding and a primary power transistor; a secondary side having a secondary winding and a secondary power transistor; a secondary control circuit configured to change a voltage across the secondary winding to change a voltage across the primary winding during a period when both the primary power transistor and the secondary power transistor are in a turn-off state; and a primary control circuit configured to control switching states of the primary power transistor, such that an output signal of the isolated power converter matches an output demand.

Abstract: This DC pulse power supply device includes: a DC power supply unit (10); and a pulsing unit (20) that generates a pulse output using a step-up chopper circuit connected to the DC power supply unit. A clamp voltage unit (30) has an output end that is connected to a connection point (s) between a switching element (22) and a DC reactor (21), and applies a clamp voltage (VC) to one end of the switching element (22). During an off period (Toff) of the step-up chopper circuit, the voltage at both ends of the switching element is clamped so as to prevent damage to the switching element, suppress output voltage fluctuations resulting from load current fluctuations, and suppress power loss caused by a load current and a discharge current flowing through a resistor.

Abstract: A power supply control device includes: a drive switch circuit formed by cascade-connecting a depletion type first transistor and an enhancement type second transistor, and configured to drive a transformer of an insulated switching power supply; a control circuit configured to control the second transistor; and a start-up circuit configured to charge a power supply voltage of the control circuit by using a source voltage of the first transistor.

Abstract: The invention discloses a control method in use of a synchronous rectifier controller, controlling a synchronous rectifier in a power supply supplying power a load. The synchronous rectifier is turned ON in response to a terminal signal of the synchronous rectifier. An ON-time of the synchronous rectifier is made not less than a minimum ON-time. A detection result in association with the load is provided, for determining the minimum ON-time. The minimum ON-time is a first period when the detection result indicates the load as a first load, and a second period, shorter than the first period, when the detection result indicates the load as a second load heavier than the first load.

Abstract: Control circuitry for controlling a current through an inductor of a power converter, the control circuitry comprising: comparison circuitry configured to compare a measurement signal, indicative of a current through the inductor during a charging phase of the power converter, to a signal indicative of a target average current through the inductor for the charging phase and to output a comparison signal based on said comparison; detection circuitry configured to detect, based on the comparison signal, a crossing time indicative of a time at which the current through the inductor during the charging phase is equal to the target average current for the charging phase; and current control circuitry configured to control a current through the inductor during a subsequent charging phase based on the crossing time.

Abstract: In an embodiment, a device includes a switching power supply configured to have a first operating mode synchronized by a first clock signal generated by a clock generator a second asynchronous operating mode. The clock generator is configured such that the first clock signal becomes equal, upon transition from the second operating mode to the first operating mode, to the signal having the closest rising edge of a second clock signal and a third clock signal complementary to the second clock signal.

Abstract: A flyback converter and an output voltage acquisition method therefor and apparatus thereof, wherein the output voltage acquisition method comprises the following steps: acquiring the reference output voltage of a flyback converter; sampling the current output voltage of the flyback converter within a reset time of each switching period among M continuous switching periods of the flyback converter, wherein M is a positive integer; and according to the reference output voltage and the current output voltage, sampling a dichotomy to successively approximate the current output voltage until the M switching periods are finished, and acquiring the output voltage of the flyback converter.

Abstract: A reference current generator circuit generating a reference current that is proportional to absolute temperature as a function of a difference between bias voltages of first and second transistors. A voltage generator generates an input voltage from the reference current by applying the reference current that is proportional to absolute temperature through a plurality of transistors coupled in series between the bias voltage of the second transistor and ground, with the input voltage being generated at a node between given adjacent ones of the plurality of transistors. The input voltage is complementary to absolute temperature. A differential amplifier is biased by a current derived from the reference current and generates a temperature insensitive output reference voltage from the input voltage and a voltage proportional to absolute temperature.

Abstract: A multiphase power converter having a daisy chain control circuit and a method for controlling the same are provided. A main control circuit outputs an initial pulse width modulation signal having a plurality of initial pulses. One of a plurality of slave control circuits is connected to an output terminal of the main control circuit, and outputs a pulse width modulation signal according to the received initial pulse width modulation signal. Each of the rest of the plurality of slave control circuits outputs the next pulse width modulation signal to the next slave control circuit or the main control circuit according to the pulse width modulation signal received from the previous slave control circuit. The main control circuit automatically counts a quantity of the control circuits according to the received pulse width modulation signal and outputted initial pulse width modulation signal.

Abstract: GaN-based half bridge power conversion circuits employ control, support and logic functions that are monolithically integrated on the same devices as the power transistors. In some embodiments a low side GaN device communicates through one or more level shift circuits with a high side GaN device. Various embodiments of level shift circuits and their inventive aspects are disclosed.

Abstract: This DC pulse power supply device comprises a voltage clamper including a capacitor that is connected in parallel to a DC reactor in a chopper circuit provided in a pulsing unit in order to suppress increases in the surge voltage resulting from the leakage inductance of the DC reactor. During the start-up of pulsing operation, which is the initial stage of the pulse mode, the frequency of the pulsing operation of the chopper circuit is controlled over the period until the capacitor voltage is charged to a sufficient voltage to reset the magnetic saturation of the DC reactor.

Abstract: The present document relates to power converters. A power converter has a first stage coupled between an input of the power converter and an intermediate node, and a second stage coupled between the intermediate node and an output of the power converter. The first stage has a capacitive voltage divider with a first flying capacitor, and the second stage has a second flying capacitor and an inductor. On the one hand, the power converter establishes, in a magnetizing state, a magnetizing current path in the second stage from the intermediate node via the inductor to the output of the power converter. On the other hand, the power converter establishes, in a capacitive state, a parallel current path in the second stage from the intermediate node via the second flying capacitor to the output of the power converter.

Abstract: A power supply unit for an aerosol inhaler includes: a power supply; a first DC/DC converter; a second DC/DC converter; and a circuit board. As viewed from a first direction perpendicular to a surface of the circuit board on which the first DC/DC converter and the second DC/DC converter are mounted, at least a portion of the circuit board includes: a connection portion; a first portion extending from the connection portion in a second direction perpendicular to the first direction; and a second portion extending from the connection portion in a third direction perpendicular to the first direction and the second direction. The first DC/DC converter is mounted on the first portion, and the second DC/DC converter is mounted on the second portion.