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Switched Mode Power Converter and Method of Operation Thereof

  • US 20080278975A1
  • Filed: 03/09/2006
  • Published: 11/13/2008
  • Est. Priority Date: 03/11/2005
  • Status: Active Grant
First Claim
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1. A switched mode power converter including:

  • a transformer having a primary winding and at least one secondary winding;

    a primary side active power switch device coupled to the primary winding for selectively applying an input voltage (Vin) to the primary winding;

    a secondary side rectifier circuit including an output filter coupled to the at least one secondary winding, and a secondary side active switch device coupled between the at least one secondary winding and the output filter; and

    primary side and secondary side control means for regulating the switching of the primary side and secondary side switches, respectively, and configured so as to reduce the duty cycle of the primary side switch device during a lower power mode of operation of the converter, the reduction of the duty cycle of the primary side switch being determined with reference to the duty cycle of the secondary side switches.

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