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Configurable load control device for light-emitting diode light sources

  • US 8,492,988 B2
  • Filed: 06/11/2010
  • Issued: 07/23/2013
  • Est. Priority Date: 10/07/2009
  • Status: Active Grant
First Claim
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1. An LED driver for controlling an LED light source, the LED driver comprising:

  • a power converter circuit operable to receive a rectified AC voltage and to generate a DC bus voltage;

    an LED drive circuit operable to receive the bus voltage and to control both the magnitude of a load current conducted through the LED light source and the magnitude of a load voltage produced across the LED light source, the LED drive circuit comprising a linear regulator including a regulation transistor adapted to be coupled in series with the led LED light source; and

    a control circuit coupled to the LED drive circuit for adjusting the magnitude of the load voltage produced across the LED light source when operating in a voltage load control mode, the control circuit operatively coupled to the linear regulator of the LED drive circuit for controlling the linear regulator to adjust the magnitude of the load current conducted through the LED light source when operating in a current load control mode.

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