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Efficient power conversion circuit having zero voltage switching

  • US 20010036088A1
  • Filed: 05/04/2001
  • Published: 11/01/2001
  • Est. Priority Date: 05/04/2000
  • Status: Active Grant
First Claim
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1. A power converter having an input and output, comprising:

  • a full bridge circuit coupled to the input of the power converter;

    a converter controller coupled to the full bridge circuit, to provide control signals thereto;

    a transformer coupled to the full bridge circuit to receive power from the full bridge circuit into a primary winding thereof;

    the full bridge circuit comprises a plurality of switching devices that intermittently couple the primary winding to the input of the power converter; and

    an output side circuit connected to the secondary winding of the transformer and including a switching circuit coupled to provide stored magnetic energy to drive the switching transitions of the switching devices in the full bridge circuit, wherein the switching circuit closes at a predetermined time delay after the switching transitions in the full bridge circuit to accomplish zero voltage switching for the plurality of switches in the full bridge circuit.

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