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Title: Elimination of electrolytic capacitor through high-voltage driving of LED aided by third-order harmonic current injection
Authors: Leung, KH
Wong, CS
Loo, KH 
Lai, YM 
Chow, MHL 
Keywords: Driver circuits
Electrolytic capacitors
Light emitting diodes
Issue Date: 2013
Publisher: IEEE
Source: IECON 2013-39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013-39th Annual Conference of the IEEE, 10-13 November 2013, Vienna, p. 6058-6062 How to cite?
Abstract: In this paper, the concept of high-voltage driving of LED is proposed to reduce the output voltage ripple of LED driver circuits by decreasing the AC current flowing through the output capacitor, leading to the potential replacement of electrolytic capacitor with other capacitor types having significantly longer lifetime. It also enables a direct driving of the LED load without the need for a second stage for voltage step-down. To further reduce the output voltage ripple's amplitude or output capacitor's size, the well-known third-order harmonic current injection technique can be incorporated. A general design procedure including the effect of harmonic current injection is proposed and verified experimentally.
ISSN: 1553-572X
DOI: 10.1109/IECON.2013.6700130
Appears in Collections:Conference Paper

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