Patent ID: 7518895

Claim:
A power converter system comprising: a first input terminal and a second input terminal operable to connect to an alternating current (AC) power source; an output terminal at which an output voltage can be provided to a load; an output capacitor coupled to the output terminal; a first inductor and a first diode connected in series between the first input terminal and the output terminal; a second inductor and a second diode connected in series between the second input terminal and the output terminal; a first switch connected at one end to the first inductor and the first diode, and connected at another end to a power supply rail; a second switch connected at one end to the second inductor and the second diode, and connected at another end to the power supply rail; wherein the first switch and the second switch alternately function as a boost switch and a synchronous rectifier for charging and discharging the first and second inductors during operation of the power converter system; and an auxiliary network operable to provide for zero voltage switching (ZVS) and zero current switching (ZCS) conditions for both the first and second switches during operation of the power converter system; wherein the auxiliary network comprises a third switch and an auxiliary capacitor, the third switch connected at one end to the power supply rail, the auxiliary capacitor operable to support ZVS conditions for the third switch during operation of the power converter system.