Abstract: A T-type inductor-capacitor-inductor (LCL) resonant converter and its soft switching modulation method under a full power range. A full bridge inverter circuit is provided at a primary side of a T-type inductor-capacitor-inductor (LCL) resonant converter. The full bridge inverter circuit includes four metal-oxide-semiconductor (MOS) transistors. A half bridge rectifier circuit is provided at a secondary side of the T-type LCL resonant converter, and the half bridge rectifier circuit includes two MOS transistors and two equalizing capacitors. The soft switching modulation method for the T-type LCL resonant converter under a full power range is provided based on the T-type LCL resonant converter. The soft switching modulation method requires all switching transistors to operate at a duty cycle of 50% within one cycle. A high-frequency alternating voltage of the primary side has a symmetrical waveform, and a high-frequency alternating voltage of the secondary side has a square waveform.

Abstract: A multi-phase power system configured to add and remove phases according to a plurality of states can increase the efficiency of the power system, which can increase a battery life in mobile applications. After phases are shed, a load may quickly change requiring all phases to be activated before an over current protection triggers a shutdown. The response of the power system to these load transients may be improved through the use of multiple triggers, which can provide an early warning of the changing load requirements more accurately and consistently than a single trigger.

Abstract: An electrical assembly including a converter for connection to an electrical network, the converter including at least one module having at least one switching element and at least one energy storage device, the switching element and the energy storage device arranged to be combinable to provide a voltage source, the electrical assembly including a controller configured to control the switching of the switching element, wherein the electrical assembly includes a sensor configured for measuring a current of the electrical network, wherein the controller and sensor are configured to carry out a characterization of an electrical parameter so that, in use the controller controls the switching of the switching element to modify an electrical parameter of the converter so as to modify the current of the electrical network, the sensor measures a resultant modified current, and the controller processes the measured resultant modified current to characterize the electrical parameter.

Abstract: Embodiments of the disclosure include an electrical assembly. The electrical assembly can include a converter including a DC side and an AC side, the DC side configured for connection to a DC network, the AC side configured for connection to an AC network, the converter including at least one switching element; a circuit interruption device operably connected to the AC side of the converter; a DC voltage modification device operably connected to the DC side of the converter, the DC voltage modification device including a DC chopper; and a controller configured to selectively control the or each switching element, the circuit interruption device and the DC voltage modification device, wherein the controller is configured to be responsive to a converter internal fault by carrying out a fault operating mode.

Abstract: A DC/DC converter has a EFT, and converts a power supply voltage from EDLC by turning on and off the FET. A control unit outputs a first PWM signal whose duty gradually decrease from 100% to the FET when the power supply from the EDLC to the DC/DC convertor is started. Thereafter, the control unit outputs a second PWM signal having a duty controlled so that an output voltage or an output current of the DC/DC converter becomes a reference value to the FET.

Abstract: A multilink power converter with reduced winding voltage is disclosed, as well as various applications. In the disclosed embodiments, multiple primary switch modules have their inputs connected in series while using a single transformer winding connected in parallel to the modules' outputs through voltage blocking capacitors. Medium voltage solid-state transformers are presented, including three-phase power converters. Also presented are embodiments utilizing common mode inductors to equalize the currents of the high voltage modules.

Abstract: A power conversion circuit in which a switching transistor and a synchronous rectifier transistor are connected in series, and a source inductance of the switching transistor is smaller than a source inductance of the synchronous rectifier transistor.

Abstract: A failure detection circuit for a power switch transistor in a power switching converter is provided that compares a drive voltage for driving a gate of the power switch transistor to a plurality of thresholds. Based upon when the drive voltage crosses each threshold in the plurality of thresholds, a logic circuit determines whether a fault condition exists for the power switch transistor.

Abstract: A resonant DC/DC converter which has a first DC link, preferably including a first DC link capacitor; a DC/AC converter which has a first plurality of N>1 converter bridges connected in parallel to the first DC link; each converter bridge comprising a plurality of switches each of which may be switched between a conducting state and a non-conducting state. The resonant DC/DC converter also includes an AC intermediate circuit having an input connected to an output of the DC/AC converter and comprising: a transformer, preferably a medium frequency transformer, having a primary side and a secondary side; the primary side comprising at least one primary winding; a first plurality of N capacitors, wherein for each converter bridge, a different one from the first plurality of capacitors is connected between said converter bridge and the at least one primary winding.

Abstract: The present disclosure relates to a voltage source device comprising: a voltage converter for generating a supply voltage at an output node of the voltage converter based on a feedback signal provided on a feedback line; at least one switch coupled between the output node of the voltage converter and an output terminal of the voltage source device; and at least one further switch configured to selectively couple the feedback line to: the output node of the voltage converter during a first regulation mode; and to the output terminal of the voltage source device during a second regulation mode.

Abstract: In an embodiment a circuit includes a voltage-controlled oscillator (VCO) circuit having a first node configured to receive a reference voltage, a second node configured to receive a feedback signal, which is a comparison signal, indicative of a variation of a regulated output voltage of an electronic voltage regulator with respect to the reference voltage and a third node configured to provide a clock signal having a clock period based on the reference voltage and the feedback signal, and a pulse-width modulated (PWM) signal generator circuit having a first node coupled to the VCO circuit and configured to receive the clock signal, a second node configured to receive an input signal proportional to an input voltage signal at an input node of the electronic voltage regulator and a third node configured to provide at least one PWM drive signal to one or more electronic switches of a switching stage based on the clock signal.

Abstract: A control circuit for controlling a switching stage of an electronic converter includes a first terminal configured to provide a drive signal and a second terminal configured to receive a first feedback signal. A third terminal receives a second feedback signal and a driver circuit provides the drive signal as a function of a PWM signal. A PWM signal generator circuit generates the PWM signal as a function of the first feedback signal, a reference threshold and the second feedback signal or a slope compensation signal. The control circuit is configured to sense an input signal, provide a first compensation parameter, and provide a first compensating signal as a function of a power of the input sensing signal.

Abstract: In an embodiment, a switching power supply includes: an output stage; a clock generator configured to generate a first clock signal; and a control circuit configured to control the output stage based on the first clock signal, wherein the switching power supply is configured to have a first operating mode synchronized by the first clock signal, and a second operating mode that is asynchronous, wherein the clock generator is configured to maintain the first clock signal at a constant value during the second operating mode.

Abstract: An apparatus such as a power converter includes a first flying capacitor, a second flying capacitor, etc., an inductor, and a network of switches. The network of switches controls conveyance of energy from the multiple flying capacitors to the inductor. The inductor converts the received energy into an output voltage to power a load. A magnitude of the respective voltage on each of the flying capacitors is substantially the same.

Abstract: An inverter is provided. The inverter includes a DC bus having positive and negative rails and an inverter arm coupled between the positive and negative rails of the DC bus. The inverter arm includes first and second silicon carbide transistor having a current-conducting terminals connected to a central node of the inverter arm. The inverter further includes at least one silicon transistor having a third current-conducting terminal connected to the central node of the inverter arm. The inverter further includes a gate driver circuit configured to switch the first silicon carbide transistor and the second silicon carbide transistor to convert DC from said DC bus into AC, and to switch said at least one silicon transistor, when the inverter arm is subjected to a load-side short circuit current, to freewheel the load-side short circuit current.

Abstract: A system for controlling a skip mode of a switching power supply and a PWM controller are provided. The system includes a feedback signal detection circuit configured to detect an output voltage of the switching power supply and generate a feedback signal related to the output voltage; a primary winding sampling circuit coupled with a primary winding of the switching power supply and configured to sample a sampling voltage of the primary winding; a skip mode soft control circuit configured to receive the feedback signal and output an electrical signal; and a comparison circuit configured to determine a threshold for the sampling voltage, where the skip mode is activated when the feedback signal is greater than a soft activation voltage threshold, and the skip mode is pre-exited when the feedback signal is less than a predetermined voltage threshold and greater than a soft exit voltage threshold.

Abstract: A low-dropout linear regulator regulates a supply voltage and includes a voltage-to-frequency circuit producing a pulse chain with a frequency based on an error voltage. A charge pump circuit receives the pulse chain and switching one or more charge pumps based on the pulse chain. A current mirror circuit is connected to the charge pump circuit and includes a first diode-connected metal-oxide semiconductor (MOS) transistor, and a second MOS transistor having a first terminal connected to the supply voltage, a second terminal providing an output, and a gate connected to the gate of the first MOS transistor. The output is fed back to the voltage-to-frequency circuit.

Abstract: An electrical system may include an electronic control unit (ECU), a load driver connected to the ECU and configured to selectively provide a first electrical connection between a power source and a load, and/or a secondary power circuit connected to the ECU and configured to selectively provide a second electrical connection between said power source and said load. The secondary power circuit may include a wake-up circuit including a wake-up circuit switch, a trigger circuit including a trigger circuit switch, a sensing circuit including a sensing circuit switch; a switching circuit including a switching circuit switch; and/or a disable circuit connected to the ECU. The ECU may be configured to control the disable circuit to selectively open the switching circuit switch. The disable circuit may include a first disable circuit switch connected to ground and a second disable circuit switch connected to the switching circuit switch.

Abstract: A power expanding apparatus for three-phase LLC circuit is disclosed, which includes full-bridge switching networks, resonant networks, transformer networks, and rectifying networks. A primary side of a first transformer network is connected with an input voltage sequentially through a first resonant network and a first full-bridge switching network, a secondary side of the first transformer network is connected with a load through a first rectifying network; a primary side of a second transformer network is connected with the input voltage sequentially through a second resonant network and a second full-bridge switching network, and a secondary side of the second transformer network is connected with the load through a second rectifying network. Secondary sides of two transformer units in the first transformer network are in star-type connection with a secondary side of one transformer unit in the second transformer network.

Abstract: A buck-boost converter includes a voltage input terminal, a voltage output terminal, a first switch, a second switch, an inductor, a third switch, and an auxiliary capacitor. The first switch includes a first terminal coupled to the voltage input terminal, and a second terminal. The second switch includes a first terminal coupled to the voltage output terminal, and a second terminal. The inductor is coupled between the second terminal of the first switch and the second terminal of the second switch. The third switch includes a first terminal coupled to the second terminal of the second switch, and a second terminal. The auxiliary capacitor is coupled to the second terminal of the third switch.