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METHOD AND APPARATUS FOR AN INTELLIGENT LIGHT EMITTING DIODE DRIVER HAVING POWER FACTOR CORRECTION CAPABILITY

  • US 20100237786A1
  • Filed: 12/29/2009
  • Published: 09/23/2010
  • Est. Priority Date: 03/23/2009
  • Status: Active Grant
First Claim
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1. A circuit for controlling a set of light emitting diode strings, comprising:

  • a programmable controller having one or more associated detectors, the programmable controller obtains data related to one or more measureable parameters for a set of light emitting diode strings via the associated detectors, determines a drive value based at least in part on the measurable parameters, and generates a control signal based on the drive value;

    a power supply system, having power factor correction capability, obtains the control signal as a first input, and an ac waveform voltage as a second input, and generates a drive voltage based at least in part on at least one of the control signal or the ac waveform voltage; and

    a programmable variable resistor included in the power supply for setting a set of operating conditions for the input current and voltage control loop that facilitate the power supply in generating the drive voltage.

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