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Switched mode power supply and controlling method thereof

  • US 6,333,862 B1
  • Filed: 08/11/1999
  • Issued: 12/25/2001
  • Est. Priority Date: 08/11/1998
  • Status: Expired due to Term
First Claim
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1. A power supply circuit, comprising:

  • a power converter converting AC power to DC power to supply the DC power to at least one load;

    a control circuit controlling operation of the power converter, the control circuit detecting if the load consumes the DC power, and placing the power supply circuit in a power-saving mode if the load does not consume power for a predetermined amount of time, the control circuit repeatedly enabling the conversion operation of the power converter for a first predetermined period of time and disabling the conversion operation for a second predetermined period of time, greater than said first predetermined period of time, in the power savings mode of operation.

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