Journal of Power Electronics

  • 제12권6호
  • /
  • Pages.869-877
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  • 2012
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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Design and Implementation of a Current-balancing Circuit for LED Security Lights

  • Jung, Kwang-Hyun (Dept. of Electrical and Electronics Eng., Kangwon National University) ;
  • Yoo, Jin-Wan (Dept. of Electrical and Electronics Eng., Kangwon National University) ;
  • Park, Chong-Yeun (Dept. of Electrical and Electronics Eng., Kangwon National University)
  • 투고 : 2012.01.12
  • 발행 : 2012.11.20
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초록

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.

키워드

참고문헌

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피인용 문헌

  1. Dimming-Feedback Control Method for TRIAC Dimmable LED Drivers vol.62, pp.2, 2015, https://doi.org/10.1109/TIE.2014.2349871
  2. Analysis and Design of a High-Efficiency Boundary Conduction Mode Tapped-Inductor Boost LED Driver for Mobile Products vol.14, pp.4, 2014, https://doi.org/10.6113/JPE.2014.14.4.632