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Power supply with uninterruptible function

  • US 20050078494A1
  • Filed: 03/26/2004
  • Published: 04/14/2005
  • Est. Priority Date: 12/25/1998
  • Status: Active Grant
First Claim
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1. :

  • A power supply comprising;

    an AC/DC converter which converts an input AC power into DC power and outputs the DC power to an output terminal thereof, said AC/DC converter having power factor improvement function;

    a DC/DC converter whose an input terminal is connected to the output terminal of said AC/DC converter, said DC/DC converter converting a DC voltage inputted thereto into a voltage value to be applied to and used at a load;

    a DC converter whose a first terminal is connected to the output terminal of said AC/DC converter and the input terminal of said DC/DC converter; and

    DC power storage means which is connected to a second terminal of said DC converter and which supplies said DC/DC converter with a DC power through said DC converter;

    wherein usually, said load is supplied with the DC power from said AC/DC converter through said DC/DC converter, and said DC power storage means connected to said second terminal of said DC converter is supplied with the DC power to be charged from said AC/DC converter through the output terminal of said AC/DC converter, the first terminal of said DC converter and said DC converter; and

    wherein, when the input AC power is not applied to said AC/DC converter, said load is supplied with the DC power from said DC power storage means through said second terminal, said DC converter, said first terminal and said DC/DC converter in order.

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