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Supply assembly for a led lighting module

  • US 20030085749A1
  • Filed: 12/19/2002
  • Published: 05/08/2003
  • Est. Priority Date: 01/31/2001
  • Status: Active Grant
First Claim
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1. A supply assembly for a LED lighting module comprising:

  • a direct current (DC) voltage source having a first and a second supply terminal;

    a switched-mode converter connected to said first and second supply terminals for supplying power to an LED lighting module connectable to said converter, said converter comprising a controllable switch coupled to at least one of said first and second supply terminals for switchably connecting said DC voltage source; and

    a controller for controlling the switching of the controllable switch, said controller having means for supplying a dual pulse-width modulated switching signal to said controllable switch at two frequencies including a high frequency pulse-width modulated switching signal component for controlling a magnitude of an LED current in said LED lighting module, and a low frequency pulse-width modulated switching signal component for controlling a duration of the LED current.

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