Abstract: System and method for regulating a power conversion system. A system controller for regulating a power conversion system includes an operation-mode-selection component and a driving component. The operation-mode-selection component is configured to receive a first signal related to an output load of the power conversion system and a second signal related to an input signal received by the power conversion system and output a mode-selection signal based on at least information associated with the first signal and the second signal. The driving component is configured to receive the mode-selection signal and generate a drive signal based on at least information associated with the mode-selection signal, the driving signal corresponding to a switching frequency.

Abstract: For the purpose of power factor correction, an inductance (21) is supplied with an input voltage (Vin), wherein a controllable switching means (24) that is coupled to the inductance (21) is actuated in order to selectively charge and discharge the inductance (21). A control device (14) for actuating the switching means (24) is designed such that it actuates the switching means (24) selectively on the basis of one of a plurality of modes of operation. In a first mode of operation, a switch-on time is stipulated for the switching means (24) on the basis of a minimum waiting time and on the basis of a voltage that drops across the switching means (24).

Abstract: According to one aspect, embodiments of the invention provide a power supply system comprising an input, an output, a neutral point, a converter configured to convert input AC power into converted DC power, the converter including a first converter switch, a positive DC bus configured to receive the converted DC power, a negative DC bus configured to receive the converted DC power, an inverter configured to convert DC power from the positive and negative DC busses into output AC power, the inverter including a first inverter switch, and a clamp circuit coupled to the positive DC bus and coupled across at least one of the first converter switch and the first inverter switch, the clamp circuit configured, during switching operation, to clamp a voltage across the first converter switch and/or the first inverter switch to a voltage level of the positive DC bus or the negative DC bus.

Abstract: One example includes a transconductor system. The system includes a first transconductance amplifier that generates a control current in response to a first input voltage. The system also includes a second transconductance amplifier that generates an output signal in response to a second input voltage. The system further includes an intermediate amplifier that generates a control voltage in response to the control current and a third input voltage. The control voltage can be provided to the first and second transconductance amplifiers to set a transconductance of each of the first and second transconductance amplifiers to be approximately equal.

Abstract: A pulse frequency modulated (PFM) voltage converter autonomously switches between buck, buck-boost, and boost modes as a function of the input and output voltages. The voltage converter may also switch autonomously between buck mode and a low drop out (LDO) mode when configured in a system in which the battery voltage is known to always be higher than the output voltage.

Abstract: Driver circuits with S-shaped gate drive voltage curves for ramp-up and ramp-down of power field effect transistors are presented. In ramp-up, the S-shaped curve rapidly ramps the gate voltage of the power FET to its threshold. This ramp-up is self-terminating. The gate voltage of the power FET is slewed through saturation with a time constant. After a predetermined time, the gate of the power FET is driven to approach the supply voltage level. In ramp-down, the S-shaped curve rapidly ramps the gate voltage of the power FET down to its threshold voltage. This ramp-down is self-terminating. The gate voltage of the power FET is slewed through saturation. The gate-source voltage of the power FET is rapidly ramped down to zero. Such S-shaped curves for the gate drive signal allow the control of the transition times of the gate drive signal to acceptable levels of voltage/current spikes and electromagnetic interference.

Abstract: A full bridge circuit is disclosed. The full bridge circuit includes first and second half bridge circuits each having a midpoint node, and a transmitter tank circuit connected across the midpoint nodes and configured to transmit power based on the transmitter tank current to a load. The full bridge circuit also includes a ZVS tank circuit connected across the midpoint nodes. The ZVS tank circuit generates first and second ZVS tank currents. The first ZVS tank current and the transmitter tank current cooperatively cause the voltage at the first midpoint node to be substantially equal to the voltage of a power or ground node, and the second ZVS tank current and the transmitter tank current cooperatively cause the voltage at the second midpoint node to be substantially equal to the voltage of the power or ground node.

Abstract: A power supply device includes an input terminal, a regulated voltage output terminal, a switch, a first transistor, and a current split circuit. The input terminal receives a first control voltage. The regulated voltage output terminal outputs an output voltage. The switch has a first terminal coupled to the input terminal, a second terminal, and a control terminal. The first transistor has a first terminal coupled to a voltage terminal, a second terminal coupled to the regulated voltage output terminal, and a control terminal coupled to the second terminal of the switch. The current split circuit is coupled to the voltage terminal and the regulated voltage output terminal. The current split circuit receives the first control voltage or a second control voltage, and includes a second transistor coupled between the voltage terminal and the regulated voltage output terminal.

Abstract: An insulation type step-up converter includes a core, first and second primary-side coils, a secondary-side coil, and a switching element. The core includes a middle leg, and first and second outer legs. The switching element is configured such that it can be controlled to be on/off so that electric currents flowing simultaneously in the first and second primary-side coils are opposite in direction to each other.

Abstract: The invention relates to an electromechanical assembly comprising: an alternator with a wound rotor; a regulator acting on the excitation of the alternator; a rectifier at the outlet of the alternator, supplying a rectified voltage to a continuous bus; and a booster circuit connected by means of a filter to the outlet of the alternator and supplying a voltage to the continuous bus.

Abstract: A modular high-power converter system includes an electronic power distribution unit configured to output an analog current (AC) voltage to a power bus, and at least one Transmit or Receive Integrated Microwave Module (T/RIMM) that includes a voltage converter unit and a transmitter and receiver (T/R) unit. The voltage converter unit includes at least one analog-to-digital converter (ADC) to convert the AC voltage into a direct current (DC) voltage having a first DC voltage level. The transmitter and receiver (T/R) unit includes a modular-based DC/DC converter to convert the DC voltage into a second DC voltage having a second voltage. The modular-based DC/DC converter includes a modular power converter unit configured to generate the second DC voltage. The modular converter unit is configured to be independently interchangeable with a different modular converter unit.

Abstract: 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.

Abstract: A control circuit for controlling a Switch-Mode Power Supply (SMPS) includes a current conduction duration determining circuit, an integrator circuit, a feedback circuit, a sawtooth generator circuit, and a gate control circuit. The current conduction duration determining circuit produces a duration signal according to a duration of a current of the SMPS. The integrator circuit produces an integrator output corresponding to an integral over time of a magnitude of the current. The feedback circuit produces a comparison voltage according to an output voltage of the SMPS. The sawtooth generator circuit produces a sawtooth signal using the comparison voltage and duration signal, such as by dividing the comparison voltage by the duration signal. The gate control circuit generates a gate signal for controlling a power switch of the SMPS according to a comparison of the sawtooth signal to the integrator output. The SMPS may be a Power Factor Correction circuit.

Abstract: A method detects current-limit events indicating a maximum current threshold of a switching converter has been reached, A compensation voltage is adjusted in response to the detected current-limit events, where the compensation voltage defines a duty cycle of the switching converter. A time for which no current-limit events have been detected is sensed, and the value of the compensation voltage adjusted in response to the detected time reaching a time step threshold.

Abstract: The disclosure relates to a controller for a power converter, the power converter comprising a first switch and a second switch, wherein the controller is configured to receive a first control signal based on a first drain-to-source voltage of the first switch; receive a second control signal based on a second drain-to-source voltage of the second switch; derive a first switch control signal based on the first control signal and control the first switch by providing the first switch control signal to the first switch; derive a second switch control signal based on the second control signal and control the second switch by providing the second switch control signal to the second switch; wherein the first switch control signal and the second switch control signal each comprises turn-on edges and turn-off edges. Furthermore, disclosure also relates to corresponding methods, a non-transitory computer readable medium.

Abstract: In an embodiment, a current sense circuit includes a copy transistor having a gate configured to be coupled to a gate of an output transistor, and a drain coupled to an input terminal. The drain of the copy transistor is configured to be coupled to a drain of the output transistor. A first transistor has a current path coupled to a current path of the copy transistor. An error amplifier has a non-inverting input coupled to a source of the copy transistor, an inverting input configured to be coupled to a source of the output transistor, an output coupled to a gate of the first transistor, a positive power supply terminal coupled to the input terminal and a negative power supply terminal coupled to a reference supply terminal. A current-to-voltage converter has an input coupled to the current path of the copy transistor.

Abstract: A method includes generating a first gain control signal and a second gain control signal in response to a gain transition signal indicating a transition of a power converter from a first gain mode to a second gain mode. The method further includes causing the power converter to enter the first gain mode in response to the first gain control signal, and causing the power converter to enter the second gain mode in response to the second gain control signal. A circuit includes a gain transition controller generating a first gain control signal and a second gain control signal in response to a gain transition signal, and a gain control circuit causing the power converter to enter the first gain mode in response to the first gain control signal and causing the power converter to enter the second gain mode in response to the second gain control signal.

Abstract: A transformer circuit includes a first transformer, a second transformer and an inductor, where a first terminal of the first transformer is coupled to a first terminal of the second transformer. The inductor is coupled between a second terminal of the first transformer and a second terminal of the second transformer.

Abstract: A system comprises an input power stage coupled to a primary side of a transformer, an output power stage coupled to a secondary side of a transformer, a first common node capacitor and a common node resistor connected in series between a midpoint of the secondary side of the transformer and ground and a detector having an input connected to a common node of the first common node capacitor and the common node resistor, and an output connected to a control circuit, wherein the control circuit is configured to dynamically adjust a switching frequency of the system based upon an output of the detector.

Abstract: A power converter suitable for power elements of different sizes including a base, a heat sink, a circuit board and a power element is provided. The base has a partition and an opening. The partition has a first step surface and a second step surface. The first step surface and the second step surface are located at different levels. The heat sink is mounted on the base and leans against one of the first step surface and the second step surface of the partition. The circuit board is assembled on the base. The power element is disposed on the circuit board and contacts the heat sink through the opening.