Patent ID: 6606257
Filing Date: 2003-08-12
Classification: H02M

Abstract:
A soft-switching flyback converter having a primary and secondary side for providing output cycling sequence control comprising:a power transformer having at least a primary winding and a secondary winding; an input circuit on said primary side for coupling an input DC voltage to said power transformer primary winding, said input circuit including a primary side switch; and a plurality of output channels on said secondary side coupled to said power transformer secondary winding, each of said plurality of output channels including secondary side bi-directional switching means connected to said power transformer secondary winding; wherein each of said secondary side bi-directional switching means comprises a pair of sub-switches having corresponding body diodes, said sub-switches being arranged such that the corresponding body diodes are oppositely conductive, and wherein said secondary side bi-directional switching means associated with each of said plurality of output channels controls an output cycling sequence of said plurality of output channels irrespective of an output voltage of each of said plurality of output channels.