Patent ID: 7576446

Claim:
A power converter system comprising: a first switch coupled between a first node and a second node, the first switch in a main power loop for delivering power to a first load; a second switch and a transformer coupled in series between the first node and the second node, the second switch in an auxiliary power loop for delivering power to a second load; and the transformer having a primary winding and a secondary winding, the primary winding for storing energy sufficient to provide zero voltage switching (ZVS) conditions for both the first and second switches during operation of the power converter system; wherein a magnetizing inductance of the primary winding resonates with a capacitance which is equal to the combination of a capacitance of the first switch and any additional or parasitic capacitance around the first switch; wherein the magnetizing inductance of the primary winding resonates with a capacitance which is equal to the combination of a capacitance of the second switch and any additional or parasitic capacitance around the second switch.