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DIMMER DECODER WITH IMPROVED EFFICIENCY FOR USE WITH LED DRIVERS

  • US 20110115395A1
  • Filed: 10/14/2010
  • Published: 05/19/2011
  • Est. Priority Date: 10/14/2009
  • Status: Active Grant
First Claim
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1. A method comprising:

  • receiving a sense signal comprised of multiple pulses, the sense signal based on an output of a dimmer;

    for each of multiple sampling periods, sampling a subset of the pulses in the sense signal during that sampling period;

    generating a holding current for the dimmer during the sampling of the subset of pulses in at least one of the sampling periods; and

    for each of the sampling periods, generating an output value identifying a duty cycle for driving one or more light emitting diodes (LEDs);

    wherein the subset of pulses in each of the sampling periods includes multiple pulses during that sampling period but not one or more initial pulses at a beginning of that sampling period.

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