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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2012.11
- 수록면
- 869 - 877 (9page)
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초록· 키워드
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This paper presents a current-balancing circuit for security lights that uses parallel-connected LEDs. The parallel connection of LEDs causes current differences between the LED strings because of characteristic deviations. These differences can reduce the lifespan of a particular point of LEDs by thermal spotting. They can also cause non-uniform luminance of the lighting device. Among the different methods for solving these problems, the method using current-balancing transformers makes it easy to compensate for current differences and it has a simple circuitry. However, while the balancing transformer has been applied to AC light sources, LEDs operate on a DC source, so the driving circuitry and the design method have to be changed and their performances must be verified. Thus in this paper, a design method of the balancing transformer network and the driving circuitry for LEDs is proposed. The proposed design method could have a smaller size than the conventional design method. The proposed circuitry is applied to three types of 100-watt LED security lights, which use different LEDs. Experimental results are presented to verify the performance of the designed driving circuits.
목차
Abstract
Ⅰ. INTRODUCTION
Ⅱ. DRIVING CIRCUITRY AND BALANCING TRANSFORMER NETWORK
Ⅲ. EXPERIMENTAL RESULTS AND DISCUSSION
Ⅳ. CONCLUSIONS
ACKNOWLEDGMENT
REFERENCES
참고문헌 (20)
참고문헌 신청
1. [학술지(정기간행물)] - Jeff Y. Tsao / 2004 / Solid-state lighting: Lamps, chips, and materials for tomorrow / IEEE Circuit Devices Mag 20 (3) : 28 ~ 37
2. [학술지(정기간행물)] - Y. Hu / 2008 / LED driver with self-adaptive drive voltage / IEEE Trans. Power Electron 23 (6) : 3116 ~ 3125
3. [학술대회논문] - C. L. Chiu / 2008 / A high accuracy current-balanced control technique for LED backlight / in Proceeding of. IEEE Power Electronics. Spec. Conf : 4202 ~ 4206
4. [학술지(정기간행물)] - H. J. Chiu / 2010 / A high-efficiency dimmable LED driver for low-power lighting applications / IEEE Trans. Ind. Electron 57 (2) : 735 ~ 743
5. [학술지(정기간행물)] - S.N. Li / 2012 / Novel self-configurable current-mirror techniques for reducing current imbalance in parallel light-emitting diode (LED) strings / IEEE Trans. Power Electron 27 (4) : 2153 ~ 2162
2. [학술지(정기간행물)] - Y. Hu / 2008 / LED driver with self-adaptive drive voltage / IEEE Trans. Power Electron 23 (6) : 3116 ~ 3125
3. [학술대회논문] - C. L. Chiu / 2008 / A high accuracy current-balanced control technique for LED backlight / in Proceeding of. IEEE Power Electronics. Spec. Conf : 4202 ~ 4206
4. [학술지(정기간행물)] - H. J. Chiu / 2010 / A high-efficiency dimmable LED driver for low-power lighting applications / IEEE Trans. Ind. Electron 57 (2) : 735 ~ 743
5. [학술지(정기간행물)] - S.N. Li / 2012 / Novel self-configurable current-mirror techniques for reducing current imbalance in parallel light-emitting diode (LED) strings / IEEE Trans. Power Electron 27 (4) : 2153 ~ 2162
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