Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the improvement of Current Control Accuracy of High Power LED Driver

고전력 LED 구동장치의 전류제어 정밀도 향상에 관한 연구

  • 박정훈 (청주대학교 전자정보공학부) ;
  • 서강면 (청주대학교 전자정보공학부) ;
  • 김진근 (청주대학교 전자공학과) ;
  • 홍성훈 (청주대학교 전자공학과) ;
  • 강문성 (청주대학교 전자정보공학부)
  • Published : 2005.10.28
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Abstract

In this paper, we have studied for the current control method with high accuracy for the high power LED driver that is necessary to the lighting system using LEDs. The control performance of LED driver can be improved with the adjustment of current control boundary by introducing D/A converters for setting high-offset and low-offset. And microprocessor (ATmega128) and D/A converter with 8 bits resolution are used in the proposed driver so that LED's illumination can be remotely controlled by serial communication on the spot or by key input. In the results of performance tests, we confirmed that the proposed control method is superior to the conventional control method using op-amps.

Keywords