Transformer Coupled Recycle Snubber for High-Efficiency Offline Isolated LED Driver With On-Chip Primary-Side Power Regulation

This paper presents a high-efficiency offline isolated LED driver based on a flyback converter. In order to achieve high power conversion efficiency as well as a low-cost design, a simple passive lossless turn-off snubber is proposed to reduce the switching loss of the power switch. A primary-side power regulation scheme is also proposed to compensate for forward voltage variation and aging caused by process and temperature variations. The proposed control scheme is designed and fabricated on-chip using a 0.35-mu m BCDMOS process. Test results of the proposed LED driver show an efficiency level that exceeds 83% (up to 90%) in an output range of 5-10W with an input range of 85-265 V-AC.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2014-12
Language
ENG
Keywords

FLYBACK CONVERTER; CIRCUIT; VOLTAGE; SCHEME

Citation

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, v.61, no.12, pp.6710 - 6719

ISSN
0278-0046
DOI
10.1109/TIE.2014.2316221
URI
http://hdl.handle.net/10203/192744
Appears in Collection
EE-Journal Papers(저널논문)
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