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System and method for driving light-emitting diodes (LEDs)

  • US 20070035538A1
  • Filed: 08/11/2005
  • Published: 02/15/2007
  • Est. Priority Date: 08/11/2005
  • Status: Active Grant
First Claim
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1. A circuit comprising:

  • a switch current regulator coupled to a current control signal input, the switch current regulator configured to control a current provided to a light-emitting diode (LED) based upon a magnitude of a voltage on the current control signal input;

    a switching voltage regulator coupled to the switch current regulator and the LED, the switching voltage regulator configured to provide current to the LED; and

    a sensor coupled to the switch current regulator, the LED, and a signal feedback circuit, the sensor configured to measure status information regarding the switch current regulator and the LED and provide the status information to a controller via the signal feedback circuit, wherein the status information can be used to adjust the voltage on the current control signal input.

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