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CAPACITIVE DROP POWER SUPPLY WITH LOW POWER CONSUMPTION

  • US 20060050540A1
  • Filed: 09/08/2004
  • Published: 03/09/2006
  • Est. Priority Date: 09/08/2004
  • Status: Active Grant
First Claim
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1. A capacitive drop power supply circuit for use in a home appliance, comprising:

  • a rectifier electrically connected to an AC power source and operable to convert an AC power signal to a DC voltage;

    a current limiting capacitance interposed between the AC power source and the rectifier;

    a low voltage output stage having an output terminal for connection to a low voltage load, the low voltage output stage receiving the DC voltage from the rectifier and operable to output the DC voltage at the output terminal;

    a higher voltage output stage having an output terminal for connection to a higher voltage load, the higher voltage output stage connected in series with the low voltage stage and operable to output the DC voltage at the output terminal; and

    a shunt circuit path connected in parallel across the higher voltage output stage and operable to reduce real power consumption when a no load condition is placed on the higher voltage output stage.

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