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Interleaved DC to DC flyback converters with reduced current and voltage stresses

  • US 5,508,903 A
  • Filed: 04/21/1995
  • Issued: 04/16/1996
  • Est. Priority Date: 04/21/1995
  • Status: Expired due to Fees
First Claim
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1. An interleaved DC to DC flyback converter comprising:

  • DC input supply lines;

    an input capacitor connected to the DC input supply lines;

    a first and a second flyback transformer means each having a primary winding and at least one secondary winding, each of said first and said secondary windings having a first and a second terminals;

    a first and a second switching means controlled with 180°

    phase shift relative to each other for providing a regulated energy flow from the DC input supply lines, each of the first and the second switching means being coupled in a series circuit with the primary winding of the corresponding transformer means, each of said two series circuits being connected in parallel with the input capacitor;

    a first catch rectifying means connected between the first and the second terminals of the secondary windings aiding each other;

    an output filter capacitor having two terminals coupled with opposite terminals of said secondary windings;

    a second catch rectifying means connected between the first terminals of the secondary windings;

    a third catch rectifying means connected between the second terminals of the secondary windings; and

    a control circuit for driving alternately the first and the second switching means with a predetermined duty ratio.

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