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A New Low Voltage Detecting Method for Multi-string LED BLU Circuits
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| Author(s) |
EUNCHUL KANG, Duckki KWON, Jaeeul YEON , Dongsoo KIM , WONHI OH |
| Abstract |
This paper proposes a new lowest-voltage detecting circuit for multi-channel LED backlighting units (BLUs) for LCD TVs. The proposed circuit detects the lowest voltage drop among the multi-channel LED strings with reduced number of devices. After detecting such condition the circuit provides a feedback voltage to control the output voltage of the boost converter. Therefore, it can minimize the power losses in LED driving circuit. Experimental results are presented for a 15W boost converter driving 40mA, 8-channel LED strings. |
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| Filename: | 0235-epe2009-full-23370013.pdf |
| Filesize: | 388.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2010-01-27 by System |
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