Capacitive current balancing for parallel-connected LED strings with tight load-regulation by switch-controlled capacitor

C. S. Wong, Ka Hong Loo, Y. M. Lai, Chi Kong Tse

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

1 Citation (Scopus)

Abstract

This paper proposes a capacitive current balancing method for multistring LED lighting system driven by a LCC resonant converter. Different from conventional current balancing methods, this method replaces the capacitor in the resonant tank by a switch-controlled capacitor (SCC) with which the output voltage can be regulated by modulating the frequency of the resonant tank instead of the switching frequency of the converter. As a result, LED currents can be balanced and maintained to a desired value even for wide load and input voltage variations. A 70-W LCC resonant converter is built to validate the method.
Original languageEnglish
Title of host publication2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe
PublisherIEEE
ISBN (Electronic)9789075815245
DOIs
Publication statusPublished - 25 Oct 2016
Event18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe - Karlsruhe, Germany
Duration: 5 Sep 20169 Sep 2016

Conference

Conference18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe
Country/TerritoryGermany
CityKarlsruhe
Period5/09/169/09/16

Keywords

  • Converter control
  • Lighting
  • Power supply
  • Resonant converter

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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