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

Author

Seungchul Jung ; Gyu-Hyeong Cho

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea

Volume

61

Issue

12

fYear

2014

fDate

Dec. 2014

Firstpage

6710

Lastpage

6719

Abstract

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- μm BCDMOS process. Test results of the proposed LED driver show an efficiency level that exceeds 83% (up to 90%) in an output range of 5-10 W with an input range of 85-265 V_AC.

Keywords

AC-DC power convertors; BIMOS integrated circuits; LED lamps; ageing; driver circuits; snubbers; transformers; BCDMOS process; flyback converter; offline isolated LED driver; on-chip primary-side power regulation; passive lossless turn-off snubber; power 5 W to 10 W; power conversion efficiency; power switch; size 0.35 mum; transformer coupled recycle snubber; AC-DC power converters; Light emitting diodes; Snubbers; Zero voltage switching; AC-to-DC converter; LED driver; flyback turn-off snubber; passive lossless snubber; primary-side power regulation;

fLanguage

English

Journal_Title

Industrial Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0278-0046

Type

jour

DOI

10.1109/TIE.2014.2316221

Filename

6785982