Patent ID: 7872879

Claim:
A switched mode power converter including: a transformer having a primary winding and at least one secondary winding; a primary side active switch device coupled to the primary winding for selectively applying an input voltage to the primary winding; a first secondary side rectifier circuit including a first output filter coupled to the at least one secondary winding, and first and second active switch devices each comprising a first and second Field Effect Transistor each having a source, drain and gate with the respective drains of the first and the second Field Effect Transistor being coupled together, the first and second switch devices being coupled between the at least one secondary winding and the first output filter, the first and second switch devices being arranged such that each one is operable to block current between the at least one secondary winding and the first output filter in an opposite direction to the other and switchable at different times to the other; and a second secondary side rectifier circuit including a second output filter, and a third active switch device comprising a third Field Effect Transistor having a source, drain and gate, its drain being coupled to the respective drains of the first and second switch devices, and its source being coupled to the second output filter.