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Quasi-resonant DC-DC converters with reduced body diode loss

  • US 6,989,997 B2
  • Filed: 06/25/2003
  • Issued: 01/24/2006
  • Est. Priority Date: 06/25/2003
  • Status: Expired due to Fees
First Claim
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1. A quasi-resonant buck converter comprising:

  • a) a connection point;

    b) a top switch connected to a power source and to the connection point;

    c) an auxiliary switch connected to the connection point and to a return potential;

    d) a resonant inductor connected to the connection point and to an output inductor;

    e) a resonant capacitor connected to the return potential and to the resonant inductor, whereby the resonant inductor and resonant capacitor are connected in series across the auxiliary switch;

    f) a synchronous switch operated using zero voltage switching connected in parallel with the resonant capacitor.

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