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Full digital dimming ballast for a fluorescent lamp

  • US 20050156534A1
  • Filed: 01/15/2004
  • Published: 07/21/2005
  • Est. Priority Date: 01/15/2004
  • Status: Active Grant
First Claim
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1. A lamp-control circuit, comprising:

  • a power factor corrector;

    a digitally controlled ballast, comprising power devices and coupled to the power factor corrector, the ballast operable to power a lamp;

    a current feedback loop, coupled between at least one of the power devices and the digitally controlled ballast; and

    a voltage feedback loop, coupled between the lamp and the digitally controlled ballast.

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