无电解电容的高功率因数AC-DC LED驱动器

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Abstract High-brightness light-emitting diode is a promising new generation of green lighting source with the advantages of high efficiency, good optical performance, long lifetime, and environmentally friendly. The lifetime of the LED driver is the bottleneck of the whole system, which limits the LED luminaries’ lifetime. Combined with the requirement of the driving current, a LED driver which is driven by the proposed pulsating current is presented. This method can decrease the power ripple in the bus capacitor. Through theoretical analysis, the volume of the bus capacitor can be decreased to 52.7%, while the bus voltage ripple remains same and the input power is high. A prototype of a 50W LED driver has been built and the experimental results are presented.

Key words： LED driver long life high power factor without electrolytic capacitors

Received: 25 April 2011 Published: 20 March 2014

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TM923

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	Ni Jianjun
	Zhang Fanghua
	Yu Yijie

Cite this article:

Ni Jianjun,Zhang Fanghua,Yu Yijie. High Power Factor AC-DC LED Drivers Without Electrolytic Capcitors[J]. Transactions of China Electrotechnical Society, 2012, 27(12): 79-86.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2012/V27/I12/79

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