Low-current ripple LED driver by two-phase driving approach

Chi Shing Wong, Yuk Ming Lai, Ka Hong Loo, Chi Kong Tse

Research output: Journal article publicationJournal articleAcademic researchpeer-review

2 Citations (Scopus)


A two-phase driving approach for light-emitting diode (LED) power supply is proposed. The approach uses two rectangular current sources working complementarily to supply a constant current to the LED string so that the output current can contain very low ripple even without the use of any electrolytic capacitor in the driver circuit. A dual asymmetrical half-bridge converter with power factor correction is used to realise the approach. A 60 W prototype is built and tested to validate the idea.
Original languageEnglish
Pages (from-to)1804-1806
Number of pages3
JournalElectronics Letters
Issue number22
Publication statusPublished - 1 Jan 2015

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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