The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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High Efficiency LED Driving System using Y type Current Balancing Transformer

Y형 전류평형 트랜스포머를 이용한 고효율 LED 구동시스템

  • Kim, Jin-Gu (Dept. of Electrical & Electronics Eng., Kangwon National University) ;
  • Yoo, Jin-Wan (Dept. of Electrical & Electronics Eng., Kangwon National University) ;
  • Park, Chong-Yeon (Dept. of Electrical & Electronics Eng., Kangwon National University)
  • Received : 2015.02.16
  • Accepted : 2015.03.31
  • Published : 2015.06.20
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Abstract

LEDs have been widely used in lighting displays, automobiles, and airplanes owing to their excellent light output characteristics and long lifespan. Though LEDs are manufactured under the same process, variations in impurity concentrations cause electrical deviation among LEDs. The resulting electrical deviation can not only reduce the life time of the LED but also cause non-uniform luminance of LEDs connected in parallel. LED driving circuit is required to solve these problems. In this paper, we propose a LED driving system using Y-type current balancing transformer to maximize the efficiency of the system by removing output stage Schottky diodes. Experimental results are presented to verify the performance of proposed LED driving system that is applied to 80 W LED modules.

Keywords

References

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