Title :
A novel LED driver with adaptive drive voltage
Author :
Yuequan Hu;Milan M. Jovanovic
Author_Institution :
Delta Power Electronics Laboratory, Delta Products Corporation P.O. Box 12173, 5101 Davis Drive Research Triangle Park, NC 27709, USA
Abstract :
This paper presents an LED driver circuit consisting of a voltage pre-regulator and multiple linear current regulators with an adaptively-controlled supply voltage. The proposed driver circuit powers all LEDs in a string with a constant current and provides consistent illumination and optimal operating efficiency at low cost. The performance of the proposed driver was verified experimentally.
Keywords :
"Light emitting diodes","Voltage","Regulators","Driver circuits","Temperature dependence","Power electronics","Laboratories","Lighting","Cost function","Automobiles"
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2008. APEC 2008. Twenty-Third Annual IEEE
Print_ISBN :
978-1-4244-1873-2
DOI :
10.1109/APEC.2008.4522777
