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Current synchronous zero voltage switching resonant topology

DC
  • US 5,615,093 A
  • Filed: 08/05/1994
  • Issued: 03/25/1997
  • Est. Priority Date: 08/05/1994
  • Status: Expired due to Term
First Claim
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1. A power converter for converting an input power signal to an output power signal, said power converter comprising:

  • a controller having an oscillator circuit, a synchronous detector and a plurality of control signal outputs for providing transistor control signals dependent upon the oscillator frequency;

    a plurality of transistors coupled to receive said input power signal and provide a square wave voltage signal, each transistor being associated with one of said control signal outputs and having a control input coupled to receive a control signal from the associated control signal output of said controller;

    a resonant circuit controlled by said square wave voltage signal from said plurality of transistors to produce a resonant current and provide a high frequency sine wave output voltage signal;

    wherein said synchronous detector includes a circuit coupled to detect the resonant frequency of the resonant circuit and to provide an oscillator control signal to control the frequency of the oscillator circuit dependent upon the resonant frequency of the resonant circuit.

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