Title :
A high efficiency driver for high-brightness white LED lamp
Author :
Chen, Yu-Jen ; Yang, Wen-Ching ; Moo, Chin-Sien ; Hsieh, Yao-Ching
Author_Institution :
Electr. Eng. Dept., Nat. Sun Yat-Sen Univ., Kaohsiung, Taiwan
Abstract :
A high efficiency driver is proposed for the high-brightness white LED lamp. The driver consists of a dc power source in series with a current regulator. The current regulation is accomplished by partially processing the power from the dc power source. The dimming feature of the LED lamp can be made by regulating the current. The detailed circuit operation stages and analysis are provided. A laboratory circuit is designed for an LED lamp which is composed of eight high-brightness LEDs. Experimental results demonstrate that a high efficiency can be achieved even at a dimmed lamp power.
Keywords :
LED lamps; brightness; driver circuits; current regulator; dc power source; dimmed lamp power; high efficiency driver; high-brightness white LED lamp; laboratory circuit; light emitting diode; LED driver; LED lamp; current regulation;
Conference_Titel :
TENCON 2010 - 2010 IEEE Region 10 Conference
Conference_Location :
Fukuoka
Print_ISBN :
978-1-4244-6889-8
DOI :
10.1109/TENCON.2010.5685986
