A controller for a boost power factor correction (PFC) converter. The controller is configured to operate the boost PFC converter in multiple operating modes, including a continuous conduction mode (CCM), a transition mode (TM), and a hybrid mode in which the controller operates the converter in both CCM and TM within a same line cycle. An example controller includes a current control loop and a mode transition circuit. The current control loop is configured to compute an inductor current for each of first and second operation modes, based on a current sample taken, for example, during a boost synchronous rectifier conduction period of the converter. The mode transition circuit includes digital logic circuitry and is configured to generate a pulse indicating that one, two or all three of: zero-voltage switching (ZVS) has been achieved; the synchronous rectifier conduction period is active; and/or one of TM or hybrid mode is active.

Apparatus and methods for sensing resonant circuit signals to enhance control in a resonant converter are described herein. A buffer circuit coupled in parallel with or across a resonant component (e.g., a transformer) input port avails a buffered primary port signal for use in resonant conversion. The buffered primary port signal is a comprehensive signal including information relating to both input voltage and input power; and it may be used to advantageously enhance switching and power conversion in an inductor-inductor capacitor (LLC) converter. Additionally, the LLC converter uses a sense interface circuit to provide a scaled replica of the buffered primary port signal. In one example the scaled replica can advantageously be used with a secondary side controller to control output power based on the comprehensive information contained within the buffered primary port signal.

A method involves controlling, for a duration of a first modulation period, a first average off-time of a main switch of a power converter such that the first average off-time of the main switch corresponds to a first intermediate valley number of multiple intermediate valley numbers, an average of the intermediate valley numbers corresponding to a target number of valleys of a resonant waveform at a drain node of the main switch. A second intermediate valley number of the intermediate valley numbers is selected upon expiration of the first modulation period. A difference of the second intermediate valley number and the first intermediate valley number is equal to a fractional valley number offset. A second average off-time of the main switch is controlled for a duration of a second modulation period such that the second average off-time of the main switch corresponds to the second intermediate valley number.

Various disclosed embodiments include illustrative controller modules, direct current (DC) fast charging devices, and methods. In an illustrative embodiment, a controller module for a DC-DC converter includes a controller and computer-readable media configured to store computer-executable instructions configured to cause the controller to: receive an input voltage, an output voltage, and a requested power value. The computer-executable instructions are configured to cause the controller to: determine primary and secondary side inter-bridge phase shifts responsive to the requested power value, the input voltage, and the output voltage; determine an effective phase shift value responsive to the requested power value, the input voltage, the output voltage, and the primary side inter-bridge phase shift; generate control signals for switches of the DC-DC converter responsive to the primary side inter-bridge phase shift, the secondary side inter-bridge phase shift, and the effective phase shift value; and output the generated control signals.

The subject application provides a zero-voltage switching flyback converter comprising: a transformer having a primary winding and a secondary winding; a primary switch and a secondary switch for conducting the currents flowing in the primary winding and secondary winding respectively. A timing control method for operating the flyback converter are provided to accomplish zero-voltage switch by turning on the secondary switch twice within one switching power cycle.

The subject application provides a zero-voltage switching flyback converter comprising: a transformer having a primary winding and a secondary winding; a primary switch and a secondary switch for conducting the currents flowing in the primary winding and secondary winding respectively. A timing control method for operating the flyback converter are provided to accomplish zero-voltage switch by turning on the secondary switch twice within one switching power cycle.

The application discloses a converter adaptable to a wide range output voltage and a control method thereof. The converter includes a PWM half-bridge circuit. The control method includes: causing the PWM half-bridge circuit to enter into a DCM by regulating a switching frequency; in each switching period, extending conduction time or turning on a corresponding synchronous rectifier once again for a predetermined time before the first power switch and the second power switch are turned on, to realize zero voltage switching (ZVS) of the first power switch and the second power switch. The application realizes ZVS of the primary power switches, thereby reducing loss.

Aspects of direct current (DC)-DC converters with an integrated matrix transformer and multiphase current doubler rectifiers are described. In some examples, a DC-DC converter can include a matrix transformer that has multiple magnetically integrated transformer components that are magnetically integrated using transformer components that share a top plate and a bottom plate. A multiphase current doubler rectifier can include multiple synchronous rectifiers corresponding to the plurality of transformer components of the matrix transformer.

In at least one embodiment, a vehicle battery charger is provided. The charger includes at least one transformer, a first active bridge, a second active bridge, and at least one controller. The first active bridge includes a first plurality of switching devices being positioned with the primary. The second active bridge includes a second plurality of switching devices being positioned with the secondary to generate. The controller is configured to activate the first plurality of switching devices based on a primary control signal and to activate the second plurality of switching devices based on a secondary control signal. The controller is configured to generate the secondary control signal in accordance to a first control variable. The controller is further configured to generate a second control variable that corresponds to a phase shift between the primary control signal and the secondary control signal.

A power semiconductor module including at least first and second power semiconductor elements, includes a first terminal, a first gate terminal, a second terminal, a second gate terminal, a third terminal and a common terminal. The first terminal connected to a first electrode of the first power semiconductor element. The first gate terminal connected to a gate of the first power semiconductor element. The second terminal connected to a first electrode of the second power semiconductor element. The second gate terminal connected to a gate of the second power semiconductor element. The third terminal connected to a second electrode of the first power semiconductor element and a second electrode of the second power semiconductor element. The common terminal that is connected to the first gate terminal through a first resistor and is connected to the second gate terminal through a second resistor.