Title :
An integration of buck converter topology for high-efficiency used in LED driver circuit
Author :
Trung Hieu Trinh;Huu Hieu Nguyen
Author_Institution :
Departement of Electrical Engineering, Danang University of Science and Technology, Vietnam
Abstract :
This paper presents an interleaved integrated buck converter for a high efficiency LED driver circuit. This integrated circuit can drive a high-power LED (1W - 3W). Assembled in matrices, it is able to drive multiple high-power LEDs. The operation principle, the power loss levels of buck converter, the design approach, technology of chip and the choice of passive components are analyzed and discused in detail. The prototype of an integrated buck converter is designed and tested for the input voltage 3.3V, current load from 0.3A to 1A at a switching frequency of 500kHz. Experimental results of four buck converters connected in parallel to drive eight 1W Lumileds show demonstrative and satisfactory results with the highest efficiency of 97.2% at the nominal load.
Keywords :
"Light emitting diodes","Inductors","Magnetic cores","Topology","Switching frequency","CMOS integrated circuits","MOS devices"
Conference_Titel :
Future Energy Electronics Conference (IFEEC), 2015 IEEE 2nd International
Print_ISBN :
978-1-4799-7655-3
DOI :
10.1109/IFEEC.2015.7361483
