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Title: Low-current ripple LED driver by two-phase driving approach
Authors: Wong, CS
Lai, YM 
Loo, KH 
Tse, CK 
Issue Date: 2015
Publisher: Institution of Engineering and Technology
Source: Electronics letters, 2015, v. 51, no. 22, p. 1804-1806 How to cite?
Journal: Electronics letters 
Abstract: 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.
ISSN: 0013-5194
EISSN: 1350-911X
DOI: 10.1049/el.2015.1479
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