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Universal voltage LED power supply with regenerating power source circuitry, non-isolated load, and 0-10V dimming circuit

  • US 9,591,706 B2
  • Filed: 09/02/2015
  • Issued: 03/07/2017
  • Est. Priority Date: 05/16/2014
  • Status: Active Grant
First Claim
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1. A light-emitting diode (LED) lighting device, comprising:

  • an LED comprising a cathode of the LED connected to a voltage input terminal of the LED lighting device; and

    a power supply including,(a) an inductor including a first terminal connected to the cathode of the LED and a second terminal of the inductor connected to an anode of the LED,(b) a first transistor connected in series with the inductor between the voltage input terminal and a ground voltage terminal to enable current through the inductor,(c) a first diode including an anode electrically coupled to the second terminal of the inductor,(d) a controller including a first terminal connected to a control terminal of the first transistor and a second terminal connected to a cathode of the first diode,(e) a third transistor electrically coupled in series between the second terminal of the controller and the cathode of the first diode,(f) a second transistor connected between the voltage input terminal of the LED lighting device and the second terminal of the controller in parallel with the inductor, first diode, and third transistor, and(g) a dimming controller connected to a third terminal of the controller.

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