2011•Unpublished venueRequires access

An efficient driver for dimmable LED lighting

Wen‐Ching Yang, Yu-Jen Chen, Chin‐Sien Moo

Abstract

A high efficiency driver circuit is proposed for Light Emitting Diode (LED) lamps with dimming feature. The driver consists of a fly-back converter in series with the dc-link. By processing partial power of the power conversion circuit for current regulation, a high overall circuit efficiency is achievable. The dimming feature can be accomplished by means of linear current regulation or the double pulse-width modulation (PWM) control scheme. Test results from an exemplar design for a 45 W LED lamp demonstrate that the high circuit efficiency.

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Available abstract

Key concepts: Pulse-width modulation, LED lamp, LED circuit, Driver circuit, Light-emitting diode, Power (physics), Computer science, Modulation (music)