Elimination of electrolytic capacitor through high-voltage driving of LED aided by third-order harmonic current injection

K. H. Leung, C. S. Wong, Ka Hong Loo, Y. M. Lai, M. H L Chow

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)


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.
Original languageEnglish
Title of host publicationProceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
Number of pages5
Publication statusPublished - 1 Dec 2013
Event39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013 - Vienna, Austria
Duration: 10 Nov 201314 Nov 2013


Conference39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013

ASJC Scopus subject areas

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

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