Design and optimization of a wide output voltage range LED driver based on LLC resonant topology

Author

Chen, Yue ; Wu, Xinke ; Qian, Zhaoming ; Zhang, Wenping

Author_Institution

Zhejiang Univ., Hangzhou, China

fYear

2011

fDate

May 30 2011-June 3 2011

Firstpage

2831

Lastpage

2837

Abstract

LLC resonant converter is an excellent candidate for medium power DC/DC converter. However, it is usually used in constant voltage output application. As for the DC/DC stage in high efficiency LED driver, the output voltage may vary widely while output current remains constant. This paper proposes a new design method which is suitable for wide output range application. Design process, analysis and optimization of design parameters are also discussed in detail. A 140W experimental prototype is built to verify the design and proved a high efficiency after optimization. Experimental result shows LLC is a good topology choice for LED driver for it is highly efficient throughout wide output voltage range.

Keywords

DC-DC power convertors; driver circuits; light emitting diodes; LLC resonant topology; medium power DC/DC converter; power 140 W; wide output voltage range LED driver; Driver circuits; Inductors; Light emitting diodes; Resonant frequency; Switching frequency; Switching loss; Zero voltage switching; LED driver; LLC; constant current; wide output range;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics and ECCE Asia (ICPE & ECCE), 2011 IEEE 8th International Conference on

Conference_Location

Jeju

ISSN

2150-6078

Print_ISBN

978-1-61284-958-4

Electronic_ISBN

2150-6078

Type

conf

DOI

10.1109/ICPE.2011.5944780

Filename

5944780