Capacitive Current Balancing for Parallel-connected LED strings with Tight Load-Regulation by Switch-Controlled Capacitor

C. S. Wong*, K. H. Loo, Y. M. Lai, C. K. Tse

*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary WorksRGC 32 - Refereed conference paper (with host publication)peer-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)978-9-0758-1524-5
DOIs
Publication statusPublished - Sept 2016
Externally publishedYes
Event18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe - Karlsruhe, Germany
Duration: 5 Sept 20169 Sept 2016

Publication series

Name2016 18th European Conference on Power Electronics and Applications, EPE 2016 ECCE Europe

Conference

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

Research Keywords

  • Converter control
  • Lighting
  • Power supply
  • Resonant converter

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