Abstract：While light-emitting diodes(LED) enjoy relatively long lifetime up to 10 years, the lifetime of traditional LED drivers using electrolytic capacitor as storage element is limited typically less than 5 years. In this paper, an AC-DC LED driver without electrolytic capacitor is studied. Compared with other methods to eliminate electrolytic capacitor, the proposed driver has the advantages of almost unity input power factor and constant output current for LEDs. The operation principle, detailed design procedure of the main circuit and control strategy are presented. The feasibility of the proposed converter has been successfully verified by experimental results.
陈武, 王广江. 一种高功率因数无电解电容LED恒流驱动电源[J]. 电工技术学报, 2013, 28(11): 216-222.
Chen Wu, Wang Guangjiang. An Electrolytic Capacitor-less LED Driver with High Input Power Factor and Constant Output Current. Transactions of China Electrotechnical Society, 2013, 28(11): 216-222.
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2013, Vol. 28 
