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Power converting method and apparatus

  • US 6,982,499 B1
  • Filed: 10/17/2000
  • Issued: 01/03/2006
  • Est. Priority Date: 11/02/1999
  • Status: Expired due to Fees
First Claim
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1. A method of supplying power using a main DC power supply for generating a predetermined voltage to supply a first output voltage substantially equal to the predetermined voltage and a second output voltage lower than the predetermined voltage, comprising the steps of:

  • connecting a first DC power supply for generating the same voltage as the second output voltage in series to a second DC power supply for generating a differential voltage between the first output voltage and the voltage from the first DC power supply, thereby forming the main DC power supply, connecting a DC-DC converter to the second DC power supply; and

    stepping down the voltage output from the second DC power supply to produce the second output voltage by using the DC-DC converter.

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