TY - GEN
T1 - Study of digital LED driving technology based on auto-identifying open strings in LEDs array
AU - Xu, Dianguo
AU - Zhang, Xiangjun
AU - Liu, Huaiyuan
PY - 2011
Y1 - 2011
N2 - A novel two-stage digital control driver for the high bright LEDs is proposed. The front stage is a PFC circuit controlled by the chip MC33262, the DC/DC stage is a half bridge circuit controlled by the micro-controller. The output current of the controller is adjusted according to the number of the strings in the open-circuit state, so the current of a single LED ring is always nearly constant even when several LED rings are in the open-circuit state. In the paper, the design process of the system is presented, an 112W prototype is presented in the laboratory, and the experimental results verify the control method proposed in the paper.
AB - A novel two-stage digital control driver for the high bright LEDs is proposed. The front stage is a PFC circuit controlled by the chip MC33262, the DC/DC stage is a half bridge circuit controlled by the micro-controller. The output current of the controller is adjusted according to the number of the strings in the open-circuit state, so the current of a single LED ring is always nearly constant even when several LED rings are in the open-circuit state. In the paper, the design process of the system is presented, an 112W prototype is presented in the laboratory, and the experimental results verify the control method proposed in the paper.
UR - https://www.scopus.com/pages/publications/84863078518
U2 - 10.1109/IECON.2011.6119781
DO - 10.1109/IECON.2011.6119781
M3 - 会议稿件
AN - SCOPUS:84863078518
SN - 9781612849720
T3 - IECON Proceedings (Industrial Electronics Conference)
SP - 2964
EP - 2968
BT - Proceedings
T2 - 37th Annual Conference of the IEEE Industrial Electronics Society, IECON 2011
Y2 - 7 November 2011 through 10 November 2011
ER -