TY - GEN
T1 - Design and implementation of high frequency AC-LED driver with digital dimming
AU - Kuo, Chao Lung
AU - Liang, Tsorng-Juu
AU - Chen, Kai Hui
AU - Chen, Jiann-Fuh
PY - 2010/8/31
Y1 - 2010/8/31
N2 - In this paper a two-stage high frequency AC-LED driver is designed and studied. The front-stage is a boost power-factor correction (PFC) circuit and the rear-stage is a half-bridge series resonant inverter. The lighting characteristics of high frequency AC voltage driving LEDs, and the effect of LED to half-bridge resonant circuit are discussed. The proposed design uses the digital dimming control to reduce LED chromaticity shift, and connect the LEDs as a full-bridge rectifier to simplify the current sensing circuit. An 80-W high frequency AC-LED driver with universal voltage input (90-264 Vrms) is implemented to verify the design. Experimental results show that the variation of chromaticity coordinates (u′, v′) from brightness 100% to 20% is within 0.0023.
AB - In this paper a two-stage high frequency AC-LED driver is designed and studied. The front-stage is a boost power-factor correction (PFC) circuit and the rear-stage is a half-bridge series resonant inverter. The lighting characteristics of high frequency AC voltage driving LEDs, and the effect of LED to half-bridge resonant circuit are discussed. The proposed design uses the digital dimming control to reduce LED chromaticity shift, and connect the LEDs as a full-bridge rectifier to simplify the current sensing circuit. An 80-W high frequency AC-LED driver with universal voltage input (90-264 Vrms) is implemented to verify the design. Experimental results show that the variation of chromaticity coordinates (u′, v′) from brightness 100% to 20% is within 0.0023.
UR - http://www.scopus.com/inward/record.url?scp=77955991850&partnerID=8YFLogxK
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U2 - 10.1109/ISCAS.2010.5537751
DO - 10.1109/ISCAS.2010.5537751
M3 - Conference contribution
AN - SCOPUS:77955991850
SN - 9781424453085
T3 - ISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems
SP - 3713
EP - 3716
BT - ISCAS 2010 - 2010 IEEE International Symposium on Circuits and Systems
T2 - 2010 IEEE International Symposium on Circuits and Systems: Nano-Bio Circuit Fabrics and Systems, ISCAS 2010
Y2 - 30 May 2010 through 2 June 2010
ER -