Title :
A TRIAC-dimmable LED lamp driver with wide dimming range
Author :
Ruihong Zhang ; Chung, Henry Shu-Hung
Author_Institution :
Centre for Smart Energy Conversion & Utilization Res., City Univ. of Hong Kong, Kowloon, China
Abstract :
A TRIAC-dimmable LED lamp driver allowing wide dimming range is proposed. The concept is based on introducing reactive power flow to increase the input current higher than the holding current of the TRIAC, while the input active power is regulated. A LED prototype has been built and tested. Experimental results reveal that the true firing angle of the TRIAC can be adjusted down to 172°, and the lamp power can be dimmed from 7.2W to 0.3W linearly.
Keywords :
LED lamps; driver circuits; reactive power; semiconductor switches; LED prototype; TRIAC-dimmable LED lamp driver; firing angle; lamp power; power 7.2 W to 0.3 W; reactive power flow; wide dimming range;
Conference_Titel :
Applied Power Electronics Conference and Exposition (APEC), 2013 Twenty-Eighth Annual IEEE
Conference_Location :
Long Beach, CA
Print_ISBN :
978-1-4673-4354-1
Electronic_ISBN :
1048-2334
DOI :
10.1109/APEC.2013.6520309
