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Voltage conversion method and voltage converter

  • US 9,673,718 B2
  • Filed: 05/07/2015
  • Issued: 06/06/2017
  • Est. Priority Date: 05/07/2015
  • Status: Active Grant
First Claim
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1. A method in a voltage converter, wherein the method comprises in each of successive drive cycles:

  • switching on for an on-period a first electronic switch connected in series with a primary winding of a transformer;

    before switching on the first electronic switch, pre-magnetizing the transformer for a pre-magnetizing period;

    receiving an input voltage by the voltage converter; and

    adjusting the pre-magnetizing period dependent on a voltage level of the input voltage,wherein there is a first delay time between an end of the pre-magnetizing period and a beginning of the on-period.

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