Patent ID: 8520414

Claim:
A controller employable with a power converter having a transformer with a primary winding coupled to a power switch and a secondary winding coupled to a synchronous rectifier switch, comprising: a first controller on a primary side of said transformer and configured to control a conductivity of said power switch; a first delay circuit on said primary side of said transformer and configured to delay an initiation of said conductivity of said power switch in conjunction with a control signal from said first controller; a second controller on a secondary side of said transformer and configured to enable a conductivity of said synchronous rectifier switch responsive to a voltage difference between two terminals of said synchronous rectifier switch; a second delay circuit on said secondary side of said transformer and configured to delay an initiation of said conductivity of said synchronous rectifier switch after said conductivity of said power switch is disabled in conjunction with a control signal from said second controller; and a shutdown circuit configured to substantially disable conductivity of said synchronous rectifier switch before said initiation of conductivity of said power switch.