Abstract: The present invention relates to a DC-DC power converter which comprises a switched converter core operated in accordance with a primary control signal to supply a primary DC output current (Io) of the converter; said primary control signal exhibiting a minimum resolution, e.g. a minimum time step, leading to a corresponding minimum current step of the primary DC output current. The DC-DC power converter additionally comprises a controllable resistive path, or a controllable current source, connected between a pair of terminals selected from a group of: (the positive output terminal, the negative output terminal, the positive input terminal, the negative input terminal) and configured to add or subtract a secondary DC output current (Icon) to the primary DC output current (Io) in accordance with a secondary control signal to adjust the load current.

Abstract: Various embodiments of the present application are directed towards an integrated circuit (IC) including a first switching device, a second switching device, an inductor, and a controller. The inductor is electrically coupled to a first source/drain region of the first switching device and a first source/drain region of the second switching device at a node. The controller is configured to alternatingly change the first and second switching devices between a first state and a second state, respectively. The first switching device is in a third state before or after the second switching device transitions between the first and second states. A subthreshold voltage is applied to a first gate of the first switching device during the third state, such that the third state is between a cutoff mode and a triode mode of the first switching device.

Abstract: According to certain aspects, the present embodiments are directed to techniques for providing the ability to monitor one or more operational parameters of a voltage regulator. In embodiments, the voltage regulator is a multiphase voltage regulator having a plurality of power stages corresponding to each respective phase. In these and other embodiments, the operational parameters include one or both of a phase current and a phase temperature. According to certain additional aspects, the present embodiments provide the ability to monitor the respective phase current output and phase temperature of each phase independently. According to further aspects, this ability to monitor the operational parameters is achieved while minimizing circuit complexity.

Abstract: An apparatus includes a current emulator and a controller. The emulator receives a reference output current value representing a measured average amount of output current delivered by the voltage converter to the load for a first portion of a power delivery cycle during which high side switch circuitry and low side switch circuitry in the voltage converter are activated at different times to produce the output current. The power delivery cycle includes a second portion during which the high side switch circuitry and the low side switch circuitry of the voltage converter are deactivated. Via trial and error, the emulator derives an average output current value delivered to the load for the power delivery cycle based on the reference output current value and repeated adjustments to the estimation of the average output current. The controller controls operation of the voltage converter based on the derived average output current value.

Abstract: The present embodiments relate generally to DC-DC converters and more particularly to a scheme for providing current sharing between parallel converters in a multiphase configuration. In some embodiments, a cycle-by-cycle instant correction to the compensation signal offset is provided based on the current share error between the paralleled converters so as to achieve improved instant current share performance.

Abstract: A non-isolated buck converter generates an output voltage by stepping down an input voltage obtained by subjecting an alternating-current voltage to full-wave rectification and smoothing, by using a step-down circuit including a switching element, an inductor, and a freewheeling diode. The switching element is disposed between a first terminal and a second terminal. A semiconductor device in charge of switching control operates with a potential at the second terminal as a reference. A control circuit provided in the semiconductor device includes a protecting circuit capable of referring to an evaluation voltage corresponding to a voltage between the first terminal and the second terminal at a sampling timing at which a predetermined period of time has passed from turning off of the switching element, and performing a protecting operation that fixes the switching element to an off state on the basis of the evaluation voltage.

Abstract: An adjustable power supply suitable for a power switch driver circuit takes an input voltage and generates output voltages at three output terminals. Two of the output terminals provide gate voltage signals to a power switch control device while the third is connected to a reference voltage. The output voltages may be adjusted using a first and second external resistor enabling power requirements for a wide variety of power switch devices to be satisfied.

Abstract: A converter includes an input capacitor, a primary-side switching circuit, a magnetic element circuit, a secondary-side switching circuit, and an output capacitor. The magnetic element circuit includes a transformer and an inductor. The input capacitor is configured to receive an input voltage. The primary-side switching circuit is coupled to the input capacitor. The magnetic element circuit is coupled to the primary-side switching circuit. The secondary-side switching circuit is coupled to the magnetic element circuit. The output capacitor is coupled to the secondary-side switching circuit. The input capacitor, the inductor, and the output capacitor oscillate to generate an oscillating current. The primary-side switching circuit is switched between a peak point of the oscillating current and a valley point of the oscillating current.

Abstract: The present invention relates to the technical field of high-gain DC-DC converters, and disclosed is a high-gain quasi-resonant DC-DC converter based on a voltage doubling rectifier circuit. On the basis of a half-bridge quasi-resonant high-gain circuit topology and by combining a bidirectional positive and negative voltage doubling rectifier circuit, the present invention provides a high-gain DC-DC converter. The converter can further improve output voltage gain and reduce output voltage ripples, and can improve the system efficiency while reducing the number of turns of a high-frequency transformer; moreover, the converter can achieve soft-switching control, thereby having the advantages of low voltage and current stress, high efficiency, and the like.

Abstract: A solution is provided for adaptive slope compensation in a DC-DC switching converter. Jitter is reduced for on times less than 50% Tpd by using two or more different slopes for the compensation ramp. Additionally, any discontinuities at the 50% duty cycle point are reduced. Details of the compensation ramp are described, where the ramp rate for the first half of the switching period, for on times greater than 50% Tpd, decreases with increasing on time until, at an on time of 100% Tpd, it is approximately zero. In addition, the ramp rate for the second half of the switching period, for on times greater than 50% Tpd, decreases with decreasing on time until, at a duty of 50%, it is equal to the ramp rate used for the first half of the switching period.

Abstract: A rectifying circuit includes: a voltage-current converting circuit that converts an input voltage into a current; a first transistor and a second transistor that are connected in series and that are connected to a first node into which the current converted by the voltage-current converting circuit flows; a third transistor and a fourth transistor that are connected in series, and that respectively mirror a current flowing through the first transistor and a current flowing through the second transistor; and a first diode that is connected between a second node connected to the third transistor and the fourth transistor, and an output terminal.

Abstract: A constant-current output control circuit includes a control module, a first resistor, a capacitor, and an error amplifier; the control module is connected to an adjustable control voltage and a detection signal, and the non-inverting input end of the error amplifier is connected to the reference voltage, the inverting input end of the error amplifier is connected to the first end of the first resistor, the output end of the error amplifier is connected to the circuit to be connected, and the first end of the capacitor is connected to the first end of the first resistor, the second end of the capacitor is connected to the output end of the error amplifier, and the second end of the first resistor is connected to the control module. The design method of the circuit is also disclosed.

Abstract: An active bridge rectifying control apparatus includes a bridge rectifying unit and a rectifying control module. The rectifying control module includes a phase control unit, a low-side drive unit, and a self-drive unit. The phase control unit provides a live line signal and a ground line signal according to a positive half cycle and a negative half cycle of an AC power source. The low-side drive unit provides a low-side control signal according to the live line signal and the ground line signal. The self-drive unit establishes a drive voltage according to the positive half cycle and the negative half cycle of the AC power source, and provides a high-side control signal according to the low-side control signal. The bridge rectifying unit rectifies the AC power source into a DC power source according to the low-side control signal, the high-side control signal, and the drive voltage.

Abstract: Disclosed is an interleaved buck-boost converter. The interleaved buck-boost converter includes a master switching stage and a slave switching stage that are controlled by a pulse-width-modulation (PWM) controller.

Abstract: In some examples, a converter circuit can be configured to operate in a buck-boost mode. The converter circuit can include a ramp generator that can be configured to generate first and second ramp signals that at least partially overlap respective portions of a buck-boost region during each intermediate clock cycle between clock cycles of a clock signal. By generating the first and second ramp signals during each intermediate clock cycle, first and second drivers can be provided to toggle switches of a power stage, such that an output voltage provided by the power stage can be averaged out over clock cycles of the clock signal to allow for a gradual transition between buck and boost modes of operation of the converter circuit. In some examples, the converter circuit can be configured to operate in a test mode and can be configured to implement trimming of a ramp signal.

Abstract: A power supply circuit includes a matrix converter that converts a first to third input alternating current (AC) phases into a single primary phase, a transformer including a primary side electrically connected to the single primary phase, a rectifier electrically connected to a secondary side of the transformer, and an output voltage terminal electrically connected to the rectifier. The matrix converter includes first through sixth bi-directional switch pairs, and each of the first through sixth bi-directional switch pairs includes first and second uni-directional switches. When the third input AC phase is disconnected or short circuited, the second and the fifth bi-directional switch pairs are turned off, and, in each of the first, third, fourth, and sixth bi-directional switch pairs, one of the first and second uni-directional switches are turned on and the other of the second and first uni-directional switches are operated as a full-bridge phase-shifted converter.

Abstract: A direct power converter includes a converter that rectifies a single-phase AC voltage, converts AC power into DC power, and outputs first instantaneous power; a power buffer circuit that receives and supplies power between the converter and a DC link and that performs buffering second instantaneous power; and an inverter that converts a DC voltage at the DC link into a second AC voltage and outputs the second AC voltage. A period for which a current that flows from the converter to the power buffer circuit continuously flows in a period shorter than a half-period of the AC voltage is longer when third power input to the inverter, fourth power output by the inverter, or an average value of the first instantaneous power decreases to a value which is less than a first threshold, from a value which is greater than or equal to a second threshold that is greater than or equal to the first threshold.

Abstract: Disclosed is a rectifying device provided with a standby power reduction function. When a voltage of unsmoothed DC power, which is output from a rectifying unit that rectifies AC power, is lowered to be equal to or smaller than a discharge reference voltage at a time around a zero-crossing point of the AC power, the present invention can instantaneously discharge a capacitor, which has been charged with the unsmoothed DC power, to be synthesized with the unsmoothed DC power, and thus supply stable DC power to a load without using an electrolytic capacitor. In particular, the present invention can adjust a resistance value of a surge prevention switch connected in series with the capacitor to control a current amount flowing through the capacitor, and thus can prevent a surge voltage from being generated when charging and discharging the capacitor.

Abstract: A cascade converter and an online monitoring method are provided. The capacitor parameters of a bus capacitor of a cascade unit is acquired according to the voltage across the bus capacitor of the first target cascade unit, the cascade side current of the single-phase cascade module and a switching signal from the first target cascade unit. In such way, it is not necessary to increase the number of the current sensors. The capacitor parameters of the bus capacitor herein include the equivalent series resistance and the capacitance. Since the capacitor parameters of the bus capacitor are monitored constantly, the aging degree of the bus capacitor can be checked at any time.

Abstract: The present disclosure relates to a converter cell (4) for a power converter. The cell comprises a plurality of semiconductor devices (T) forming a half-bridge or full-bridge topology in the cell. The cell also comprises an energy storage (5) connected across the at least one switch leg (6). The cell also comprises a crowbar leg (7) connected across the at least one switch leg, comprising a plurality of series connected semiconductor crowbar switches (C) arranged to short-circuit the energy storage (5). The cell also comprises first and second AC terminals (A, B), wherein at least one of said AC terminals is connected to one of the at least one switch leg, between two of the plurality of series connected semiconductor devices of said switch leg, and connected to the crowbar leg, between two of the plurality of series connected crowbar switches of said crowbar leg.