High efficiency switching LED driver

Details High efficiency switching LED driver High efficiency switching LED driver

2007-08-21

2007-08-21

Philogene, Haissa (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

C315S308000, C315S224000, C315S169300, C363S021010, C363S021090, C363S021130, C345S082000, C345S204000

Reexamination Certificate

active

11265290

ABSTRACT:
The present invention provides a LED driver for control the brightness of the LED. An inductor and a switch are connected in serial with the LED for control the current of the LED. A control circuit is developed to generate a control signal for switching the switch in response the LED current. A diode is parallel coupled to the inductor for freewheeling the energy of the inductor through the LED.

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U.S. Appl. No. 11/265,284 by Yang, filed Nov. 3, 2005.
U.S. Appl. No. 11/268,536 by Yang, filed Nov. 8, 2005.

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