An AC/DC power converter includes input terminals, output terminals, a power factor correction circuit coupled between the input and output terminals and including at least one power switch defining a switched current path, and a current transformer including a primary winding and a secondary winding. The primary winding is coupled in series with the switched current path. The power converter also includes a first sense switch coupled with a first end of the secondary winding, a second sense switch coupled with a second end of the secondary winding, and a control circuit. The control circuit is configured to turn on the first sense switch and turn off the second sense switch during a positive polarity of the AC voltage input, and to turn off the first sense switch and turn on the second sense switch during a negative polarity of the AC voltage input.

A switched power converter (102) is arranged for supplying lighting means (108) as a load, having at least one (M40, M41) switch controlled by a control unit (106), wherein the control unit (106) comprises: a feedback controller, such as an ASIC or microcontroller, generating a switch control signal based on a feedback signal (Imeas), such as e.g. the load current (ILED), and
a separate sweep block, supplied with a signal representing a characteristic of the load (LED), such as e.g. the load voltage (VLED), and modulating the switch control signal (tout-ctrl) by a cyclic sweep, wherein the modulated switch control signal (tout-sweep) is provided directly or indirectly to the at least one switch (M40, M41).

An inverter circuit receives an AC input signal and uses at least two bidirectional switches between the input terminals and a junction node to perform the electrical inversion function. A resonant circuit is formed by a primary side inductor between the junction node and a second node and a capacitor arrangement between the second node and the input terminals.

Power converters with power factor correction circuits and controllers thereof that are configured to generate frequency-adjustable first and second pulsed signals having respective and complementary phases separated by an adjustable deadtime. For example, a power converter may be configured to receive an alternating current (AC) input signal and output a direct current (DC) output signal. The power converter may include at least one DC/DC converter and a power factor correction circuit. The power factor correction circuit may include a first switching transistor comprising a first gate; a second switching transistor in series with the first switching transistor and comprising a second gate; and a controller configured to generate first and second pulsed signals having respective and complementary phases and separated by an adjustable deadtime and apply the generated first and second pulsed signals to the first and second gates, respectively.

Power converters with power factor correction circuits and controllers thereof that are configured to generate frequency-adjustable first and second pulsed signals having respective and complementary phases separated by an adjustable deadtime. For example, a power converter may be configured to receive an alternating current (AC) input signal and output a direct current (DC) output signal. The power converter may include a transformer and a power factor correction circuit. The power factor correction circuit may include: a first switching transistor and a second switching transistor in series with the first switching transistor; and a controller configured to generate first and second pulsed signals having respective and complementary phases and separated by an adjustable deadtime and apply the generated first and second pulsed signals to the first and second transistors, respectively. A primary side of the transformer may be coupled to a node between the first and second switching transistors.

A power supply apparatus, comprising at least one circuit board having thereon at least a first single phase power factor controlled (PFC) circuit, and a second PFC corrected circuit, the first single phase PFC circuit and the second PFC corrected circuit each having at least one PFC device in communication with at least one inverter, at least one resonant (LC) circuit positioned on the at least one circuit board and in electrical communication with at least one of the first single phase PFC circuit and the second PFC corrected circuit, at least one transformer in communication with at least one of the first single phase PFC circuit and the second PFC corrected circuit via the at least one LC resonant circuit, the at least one transformer configured to generate at least one transformer output signal, and at least one capacitor in communication with the at least one transformer and configured to output at least one magnetron input signal in response to the at least one transformer output signal, and at least one power supply generating at least one three phase input voltage, the at least one circuit board in communication with the at least one power supply.

A bridgeless converter includes a boost inductor connected in series with an alternating-current power source, a first series circuit including a first switching device and a second switching device connected in series with each other, a second series circuit including a third switching device and a fourth switching device connected in series with each other, a capacitor connected in parallel with the first series circuit and the second series circuit, and a magnetization sensing circuit including at least one auxiliary winding inductively coupled to the boost inductor.

A switched power converter (102) is arranged for supplying lighting means (108) as a load, having at least one (M40, M41) switch controlled by a control unit (106), wherein the control unit (106) comprises: a feedback controller, such as an ASIC or microcontroller, generating a switch control signal based on a feedback signal (Imeas), such as e.g. the load current (ILED), and a separate sweep block, supplied with a signal representing a characteristic of the load (LED), such as e.g. the load voltage (VLED), and modulating the switch control signal (tout-ctrl) by a cyclic sweep, wherein the modulated switch control signal (tout-sweep) is provided directly or indirectly to the at least one switch (M40, M41).

A boost rectifier that operates with a single-phase input voltage includes (i) an input stage receiving the single-phase input voltage and including first and second input filter capacitors, (ii) a switching converter stage coupled to the input stage and including a rectification circuit and an inductor circuit, series-connected first and second switches providing a common terminal therebetween, and a phase output capacitor, (iii) an output stage that transfers energy stored in the phase output capacitor to an output load, (iv) a decoupling stage that provides high-impedance decoupling between the switching converter stage and the output stage, and (v) a control circuit configured to operate the first and second switches according to an output signal of a non-linear compensation circuit that combines a feedforward signal derived from both the input and output voltages of the boost rectifier with an output voltage feedback control signal.

A power conversion device configured to execute power conversion between a vehicle and an external power supply or an external load includes a DC connector, a charging port, a power supply port, a bidirectional power conversion circuit, a switching circuit configured to execute switching to choose whether to electrically connect the power conversion circuit and the charging port or electrically connect the power conversion circuit and the power supply port, and a control circuit configured to control the power conversion circuit and the switching circuit to selectively execute a charging operation or a power supply operation.