Title :
An efficient driver for dimmable LED lighting
Author :
Yang, Wen-Ching ; Chen, Yu-Jen ; Moo, Chin-Sien
Author_Institution :
Electr. Eng. Dept., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
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.
Keywords :
LED lamps; PWM power convertors; driver circuits; LED lamps; dimmable LED lighting; dimming feature; double pulse-width modulation control scheme; driver circuit; fly-back converter; light emitting diode lamps; linear current regulation; power 45 W; power conversion circuit; Capacitors; Driver circuits; LED lamps; Pulse width modulation; Switches; Voltage control; Dimming; Light Emitting Diode (LED); double pulse-width modulation;
Conference_Titel :
Industrial Electronics and Applications (ICIEA), 2011 6th IEEE Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-8754-7
Electronic_ISBN :
pending
DOI :
10.1109/ICIEA.2011.5975982
