@article{Guo:2016:10.1109/TPEL.2015.2496247,
author = {Guo, Y and Li, S and Lee, ATL and Tan, S-C and Lee, CK and Hui, SYR},
doi = {10.1109/TPEL.2015.2496247},
journal = {IEEE Transactions on Power Electronics},
pages = {5837--5850},
title = {Single-Stage AC/DC Single-Inductor Multiple-Output LED Drivers},
url = {http://dx.doi.org/10.1109/TPEL.2015.2496247},
volume = {31},
year = {2016}
}

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TY  - JOUR
AB  - Various ac/dc LED driver topologies have been proposed to meet the challenges of achieving a compact, efficient, low-cost, and robust multistring LED lighting system. These LED drivers typically employ a two-stage topology to realize the functions of ac/dc rectification and independent current control of each LED string. The choice of having two stage conversions involves additional hardware components and a more complicated controller design process. Such two-stage topologies suffer from a higher system cost, increased power loss, and large form factor. In this paper, a single-stage ac/dc single-inductor multiple-output LED driver is proposed. It uses only one single inductor and N + 1 active power switches (N being the number of LED strings) with reduced component count and smaller form factor. The proposed driver can achieve both functions of ac/dc rectification with a high power factor and precise independent current control of each individual LED string simultaneously. A prototype of an ac/dc single-inductor triple-output LED driver is constructed for verification. Experimental results corroborate that precise and independent current regulation of each individual LED string is achievable with the proposed driver. A power factor of above 0.99 and a peak efficiency of 89% at 30-W rated output power are attainable.
AU  - Guo,Y
AU  - Li,S
AU  - Lee,ATL
AU  - Tan,S-C
AU  - Lee,CK
AU  - Hui,SYR
DO  - 10.1109/TPEL.2015.2496247
EP  - 5850
PY  - 2016///
SN  - 1941-0107
SP  - 5837
TI  - Single-Stage AC/DC Single-Inductor Multiple-Output LED Drivers
T2  - IEEE Transactions on Power Electronics
UR  - http://dx.doi.org/10.1109/TPEL.2015.2496247
UR  - http://hdl.handle.net/10044/1/38905
VL  - 31
ER  - 

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