Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Feedback Circuit of Maximum LED Channel String Voltage Detection Converter for Energy Saving on Multichannel LED Module

Multi Channel LED 조명 Module 구동에서 최대 효율을 위한 최대 Channel 전압 감지회로

  • Kim, Hyun-Sik (Department of New Lighting Solution R&DB Sector, Korea Photonics Technology Institute (KOPTI)) ;
  • Kim, Ki-Woon (Department of New Lighting Solution R&DB Sector, Korea Photonics Technology Institute (KOPTI)) ;
  • Kim, Gi-Hoon (Department of New Lighting Solution R&DB Sector, Korea Photonics Technology Institute (KOPTI)) ;
  • Kim, Yu-Sin (Department of New Lighting Solution R&DB Sector, Korea Photonics Technology Institute (KOPTI)) ;
  • Song, Sang-Bin (Department of New Lighting Solution R&DB Sector, Korea Photonics Technology Institute (KOPTI))
  • 김현식 (한국광기술원 신광원조명사업단) ;
  • 김기원 (한국광기술원 신광원조명사업단) ;
  • 김기훈 (한국광기술원 신광원조명사업단) ;
  • 김유신 (한국광기술원 신광원조명사업단) ;
  • 송상빈 (한국광기술원 신광원조명사업단)
  • Received : 2012.07.30
  • Accepted : 2012.10.12
  • Published : 2012.11.01
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Abstract

LED is divided to multichannel in order not to exceed a certain voltage in aspects of electric standard. However, it's not possible to know in accordance with what channel SMPS controls the constant voltage and current. In order to solve this problem, it needs to detect the maximum LED String voltage which is applied to LED control circuit, and it is possible to minimize the voltage drop when a difference of LED string voltage occurs by each channel if LED is controlled by the maximum LED string voltage detected. In addition, it is also possible to maximize the efficiency of LED if change LED voltage by detecting the maximum voltage. Feasibility of this claim was verified through implementation of the circuit.

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References

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