Abstract：This paper presents a new light-emitting-diode (LED) driver with capacity of high step-down and multiple-output. The operation principle and theoretical analysis of the converter are analyzed in section2 and section3. The theoretical analysis shows that the converter has following characteristics. First,If load balancing,the voltage gain is 1/nof the basic Buck converter,which n is the phase of output. Second,each phase has equal output current automatically,without more control than basic Buck converter. Third,the voltage stress is lower than basic Buck converter. Finally,the validity of the proposed converter is verified through experimental results.
邾玢鑫，罗全明，汪洋，周雒维. 多路输出高降压恒流LED驱动电源[J]. 电工技术学报, 2013, 28(7): 178-183.
Zhu Binxin,Luo Quanming,Wang Yang,Zhou Luowei. High Step-Down Constant Current LED Driver with Multiple-Output. Transactions of China Electrotechnical Society, 2013, 28(7): 178-183.
[1] 姚凯, 阮新波, 王蓓蓓, 等. 第四代电光源#x02014;#x02014;发光二极管[J]. 电源世界, 2008, (3): 21-26. Yao Kai, Ruan Xinbo, Wang Beibei, et al. The 4th generation of light source LED[J]. The World of Power Supply, 2008, 3: 21-26. [2] 廖志凌, 阮新波. 半导体照明工程的现状与发展趋势[J]. 电工技术学报, 2006, 21(9): 106-111. Liao Zhiling, Ruan Xinbo. Present status and developing trend of the semiconductor lighting[J]. Transactions of China Electrotechnical Society, 2006, 21(9): 106-111. [3] Krames M R, Shchekin O B, Mueller M R. Status and future of high-power light-emitting diodes for solid-state lighting [J]. Journal of Display Technology, 2007, 3(2): 160-175. [4] Van Der Broeck Heinz, Sauerlander Georg, Wendt Matthias. Power driver topologies and control schemes for LEDs[C]. IEEE Applied Power Electronics Conference, 2007: 1319-1325. [5] Beibei Wang, Xinbo Ruan, Kai Yao. A method of reducing the peak to average ratio of LED current for electrolytic cpacitor less AC-DC drivers[J]. IEEE Transactions on Power Electronics, 2010, 25(3): 592-601. [6] Yuequan Hu, Huber L, Jovanovic M. Single stage flyback power factor correction front-end for HB LED application[C]. IEEE Industry Applications Society Annual Meeting, 2009: 1-8. [7] Chuang Yingchun, Yulung, Chuang Hung Shiang. Single-stage power factor correction circuit with flyback converter to drive LEDs for lighting applications[C]. IEEE Industry Applications Society Annual Meeting, 2010: 1-9. [8] Mineiro S E, Antunes F L M, Perin A J. Low cost self-oscillating ZVS-CV driver for power LEDs[C]. IEEE Power Electronics Specialists Conference, 2008: 4196-4201. [9] Patterson J, Zane R. Series input modular architecture for driving multiple LEDs[C]. IEEE Power Electronics Specialists Conference, 2008: 2650-2656. [10] 杨光. LED应用的连接形式及特点[J]. 灯与照明, 2007, 31(1): 34-36. [11] Hu Y, Javanovic M M. LED driver with self-adaptive drive voltage[J]. IEEE Transactions on Power Electronics, 2008, 23(6): 3116-3125. [12] Erickson R W, Maksimovic D. Fundamentals of power electronics [M]. MA: Kluwer Academic, 2001. [13] Davoudi A, Jatskevich J. Parasitics realization in state-space average-value modeling of PWM DC-DC converters using an equal area method [J]. IEEE Transactions on Circuits System I, 2007, 54(9): 1960-1967. [14] Zhao Q, Tao F, Lee F C. A front-end DC-DC converter for network server applications[C]. IEEE Power Electronics Specialists Conference, 2001: 1535-1539. [15] Watson R, Lee F C, Hua G C. Utilization of an active-clamp circuit to achieve soft switching in flyback converters[C]. IEEE Power Electronics Specialists Conference, 1994: 909-916. [16] Choi C T, Li C K, Kok S K. Modeling of an active clamp discontinuous conduction mode flyback converter under variation of operating condition[C]. IEEE Conference on Power Electronics and Drive Systems, 1999: 730-733. [17] Zhao Q, Lee F C. High-efficiency, high step-up DC-DC converters[J]. IEEE Transactions on Power Electronics, 2003, 18(1): 65-73. [18] Qingcong Hu, Zane R. LED driver circuit with series input connected converter cells operating in continuous conduction mode[J]. IEEE Transactions on Power Electronics, 2010, 25(3): 574-582.
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