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Proceedings Paper

High brightness white LED driver with adaptive current control strategy
Author(s): Xin Liu; Shuxu Guo; Lifang Bian; Dong Qiao; Zhengxuan Wang; Yuchun Chang
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Paper Abstract

A high efficiency and high brightness white LED driver with adaptive current control strategy in 0.5um CMOS process is presented in this paper. The current control mode is determined by output current level and input voltage value, switching between normal low drop-out (LDO) regulator and 2×charge-pump mode. The presented whiter LED driver is able to drive load current as large as 1.1A. The peak efficiency as high as 95% occurs at 220mA load current, with an output voltage ripple lower than 95mV at 1.1A output current can be achieved.

Paper Details

Date Published: 22 May 2009
PDF: 6 pages
Proc. SPIE 7282, 4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, 72822E (22 May 2009); doi: 10.1117/12.830912
Show Author Affiliations
Xin Liu, Jilin Univ. (China)
Shuxu Guo, Jilin Univ. (China)
Lifang Bian, Jilin Univ. (China)
Dong Qiao, Jilin Univ. (China)
Zhengxuan Wang, Jilin Univ. (China)
Yuchun Chang, Jilin Univ. (China)


Published in SPIE Proceedings Vol. 7282:
4th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies
Li Yang; John M. Schoen; Yoshiharu Namba; Shengyi Li, Editor(s)

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