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Variable-input-voltage converter with delay proportional to V .sub.in / V .sub.out

  • US 5,745,359 A
  • Filed: 12/31/1996
  • Issued: 04/28/1998
  • Est. Priority Date: 05/01/1996
  • Status: Expired due to Term
First Claim
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1. A power converter circuit, comprising:

  • a transformer having primary and secondary windings;

    a controllable switch connected to vary current, from an input voltage connection, through said primary winding;

    wherein said input voltage varies substantially continuously;

    a power output connection operatively connected to draw power from said secondary winding of said transformer; and

    control logic operatively connected to control switching of said switch in a control relationship which, under at least some circumstances, includes a delay which is dependent on the ratio between the input voltage and the voltage of said power output connection, and is not dependent on direct sensing of the current across said switch nor of the current across said primary winding.

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