Abstract: An n-level flying capacitor multi-level buck converter, for converting a DC input voltage into a DC output voltage provided at a load. The n-level flying capacitor multi-level buck converter is configured to: operate a first and second pairs of switching elements in a sequence to selectively apply a portion of the input voltage across the output filter; and operate the first and second pairs of switching elements such that each switching element turns on when a voltage across the switching element is zero.

Abstract: A three-level zeta asymmetrical half-bridge for converting a DC input voltage into a DC output voltage comprising an asymmetrical half-bridge, a resonant tank and a zeta converter.

Abstract: A hybrid switched-capacitor power converter for converting an input voltage into an output voltage. The power converter includes: an input voltage source configured to provide the input voltage, an output capacitor connected across a load, at least two inductors arranged in parallel branches of a circuit element between the input voltage source and the load, at least one switched capacitor connected between the parallel branches of the circuit element, and at least two switches operable to selectively charge and discharge the at least one switched capacitor and the at least two inductors. The power converter is configured to be operated in a switching cycle such that, at different stages in the switching cycle, the inductors and switched capacitor are selectively charged and discharged.

Abstract: In accordance with at least one aspect of this disclosure, a converter system for a three level boost converter. In embodiments, the system includes a voltage input configured to connect to a voltage source, a switching module operatively connected to the voltage input to output quasi-square wave, a voltage output configured to supply voltage to a load, and a logic module. In embodiments, the logic module can be configured to control the switching module to modulate voltage from the voltage source to the voltage output to maintain a zero-voltage switching condition for at least a specified interval, using a method.

Abstract: A zero voltage transition, ZVT, auxiliary circuit for a multi-level power converter. The ZVT auxiliary circuit includes first and second solid state auxiliary switches connected in series across a series connection of an input voltage and an input inductor, and an auxiliary inductor Laux connected at one end between the first and second solid state auxiliary switches, the other end being arranged to be connected between two switching stages of the multi-level power converter, in use.

Abstract: An integrated single stage ac-dc driver for powering LED loads includes a boost converter operating in a Discontinuous Conduction Mode, DCM, comprising a half-bridge, and a Zeta Asymmetrical Half Bridge, ZAHB, integrated with the boost converter such that the boost converter and the ZAHB share the half-bridge to perform power factor control, PFC, with a fixed duty cycle and control an output voltage.

Abstract: In accordance with at least one aspect of this disclosure, a converter system for a three level boost converter. In embodiments, the system includes a voltage input configured to connect to a voltage source, a switching module operatively connected to the voltage input to output quasi-square wave, a voltage output configured to supply voltage to a load, and a logic module. In embodiments, the logic module can be configured to control the switching module to modulate voltage from the voltage source to the voltage output to maintain a zero-voltage switching condition for at least a specified interval, using a method.

Abstract: An integrated single stage ac-dc driver for powering LED loads includes a boost converter operating in a Discontinuous Conduction Mode, DCM, comprising a half-bridge, and a Zeta Asymmetrical Half Bridge, ZAHB, integrated with the boost converter such that the boost converter and the ZAHB share the half-bridge to perform power factor control, PFC, with a fixed duty cycle and control an output voltage.