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High efficiency power converter

  • US 7,202,653 B2
  • Filed: 03/21/2005
  • Issued: 04/10/2007
  • Est. Priority Date: 03/25/2004
  • Status: Expired due to Fees
First Claim
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1. A high efficiency power converter comprising:

  • a boost converter for converting an input voltage to a first voltage on a first output;

    a buck converter concurrently operable with the boost converter to convert the input voltage to a second voltage on a second output, the second voltage being different in value from the first voltage;

    a linear regulator coupled between the first and second outputs for converting the first voltage to a third voltage on the second output when the second voltage is lower than a first threshold; and

    a voltage detector for detecting the input voltage for preventing a reverse current flowing from the second output to the buck converter when the input voltage is lower than a second threshold.

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