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DC-DC FLYBACK CONVERTER HAVING A SYNCHRONOUS RECTIFICATION SELF-DRIVEN CIRCUIT

  • US 20070121351A1
  • Filed: 11/21/2006
  • Published: 05/31/2007
  • Est. Priority Date: 11/28/2005
  • Status: Active Grant
First Claim
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1. A DC-DC flyback converter, which comprises:

  • a primary power circuit;

    a secondary power circuit including a synchronous rectifier having first and second output terminals; and

    a self-driven circuit, wherein the self-driven circuit includes a negative voltage removal circuit for removing negative voltage between the output terminals of the synchronous rectifier and a synchronous rectifier trigger switch-off circuit for switching the synchronous rectifier to an off condition.

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