Design of LED Driving SMPS for Large Traffic Signal Lamp

대형 교통신호용 LED 구동 SMPS 설계

  • 신현용 (남서울대학교 전자공학과)
  • Received : 2009.04.06
  • Accepted : 2009.05.07
  • Published : 2009.06.30


In this study, SMPS to drive LED traffic signal light for the railroad and airport was designed and its electrical characteristics was measured. The output voltage, output current and its power efficiencies to the input voltage 8~12VAC and 8~16VDC were 6VDC, 1.85ADC and >70%, respectively. Also the power factors of the SMPS were above 0.75 in the AC input voltage range.


  1. J. Bullough, "Optimizing the Design and Use of LED for Visually Critical Application - Comparison of Traffic Signal Requirements", Lighting Research Center, 1998.
  2. 정만봉, 정학근, 유승원, "LED 교통신호등 국내 보급 타당성 분석", 한국에너지공학회, 추계학술대회 논문집, pp.153-158, 2001.
  3. 김민식, "고휘도 LED의 응용분야 및 시장전망", 정보통신진흥원 학술정보, pp.70-72, Feb. 2003.
  4. 홍창희, "고출력 LED의 신기술동향 및 응용", 조명.전기설비, Vol. 18, No. 3, pp.3-10, 2004.