Energy Channeling LED Driver Technology to Achieve Flicker-Free Operation with True Single Stage Power Factor Correction

Peng Fang, Yan Fei Liu

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

A conventional single stage ac-dc LED driver usually produces significant twice-line-frequency ripple current when a high power factor is achieved. The ripple current causes a lighting flicker of the LEDs. In this paper, an energy channeling ripple cancellation LED driver is proposed. It achieves true single stage power conversion, maintains a high power factor while significantly removing the twice-line-frequency ripple current-flicker free LED driving. An 8.5 W, 50 V/0.17 A Buck-Boost experimental prototype has been built to verify the proposed method.

Original languageEnglish (US)
Article number7502125
Pages (from-to)3892-3907
Number of pages16
JournalIEEE Transactions on Power Electronics
Volume32
Issue number5
DOIs
StatePublished - May 2017
Externally publishedYes

Keywords

  • Energy channeling
  • offline LED driver
  • power factor correction
  • single-stage power conversion

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