Abstract：The bulky electrolytic capacitor used to compensate the difference of pulsating power needs to restrict the driver lifetime. The full bridge rectification structure causes the conduction loss to increase, and the existing drivers adopting Pulse Frequency Modulation (PFM) is bound to arouse heavy electromagnetic interference (EMI). Therefore, the Series Resonant Converter (SRC) based LED driver is proposed for attenuating the low frequency ripple delivered from the Power Factor Correction (PFC) to LEDs, thereby reducing the capacitance for energy storage of off-line LED drivers. The Switching Controlled Capacitor (SCC) is used to replace the fixed capacitor, and the constant frequency operation (CFO) is realized by changing the equivalent capacitance. In addition, the sharing of SCC and half-bridge switching unit not only increases the circuit power density, but also eliminates the full-bridge rectifier diode. Finally, the superior performance of the proposed LED driver is verified by PSIM simulation and a 2-channel LED prototype with an output power of 80W.
梁国壮, 田涵雷, 王子园, 任晓宁. 一种单级无桥式高功率因数无电解电容AC-DC LED驱动器[J]. 电工技术学报, 2019, 34(16): 3396-3407.
Liang Guozhuang, Tian Hanlei, Wang Ziyuan, Ren Xiaoning. A Single-Stage Bridgeless, Electrolytic Capacitor-Free AC-DC LED Driver with High Power Factor. Transactions of China Electrotechnical Society, 2019, 34(16): 3396-3407.
[1] Wu Xinke, Hu Chen, Zhang Junming, et al.Analysis and design considerations of LLCC resonant multi- output DC/DC LED driver with charge balancing and exchanging of secondary series resonant capacitors[J]. IEEE Transactions on Power Electronics, 2014, 30(2): 780-789. [2] 邢海英, 高铁成. LED路灯光学设计与分析[J]. 电工技术学报, 2015, 30(2): 242-247. Xing Haiying, Gao Tiecheng.LED road lighting optics illumination and analysis[J]. Transactions of China Electrotechnical Society, 2015, 30(2): 242-247. [3] Dhia S B, Sicard E, Ramdani M.Electromagnetic compatibility of integrated circuits[J]. Micro- electronics Journal, 2004, 35(6): 485-486. [4] 刘素贞, 李丽滨, 蔡智超, 等. 电磁超声检测系统中消除电磁干扰电路的设计[J]. 电工技术学报, 2016, 31(1): 80-84. Liu Suzhen, Li Libin, Cai Zhichao, et al.The design for electromagnetic interference eliminating circuits in electromagnetic ultrasonic testing systems[J]. Transactions of China Electrotechnical Society, 2016, 31(1): 80-84. [5] Bhattacharyya S, Cobben S, Ribeiro P, et al.Harmonic emission limits and responsibilities at a point of connection[J]. IET Generation Transmission & Distribution, 2012, 6(3): 256-264. [6] Wang Yijie, Guan Yueshi, Liang Xinyu, et al.Two-stage LED street lighting system based on a novel single-stage AC/DC converter[J]. Power Electronics, 2014, 7(6): 1374-1383. [7] Tahan M, Hu Tingshu.Multiple string LED driver with flexible and high performance PWM dimming control[J]. IEEE Transactions on Power Electronics, 2017, 32(12): 9293-9306. [8] Choi W Y, Yoo J S.A bridgeless single-stage half- bridge AC/DC converter[J]. IEEE Transactions on Power Electronics, 2011, 26(12): 3884-3895. [9] 陈正格, 许建平, 杨平, 等. 储能电感对二次型Boost PFC变换器的性能影响[J]. 电工技术学报, 2017, 32(5): 78-85. Chen Zhengge, Xu Jianping, Yang Ping, et al.Influence of storage inductor on quadratic boost PFC converter[J]. Transactions of China Electrotechnical Society, 2017, 32(5): 78-85. [10] Wang Yijie, Qi Na, Guan Yueshi, et al.A single-stage LED driver based on SEPIC and LLC circuits[J]. IEEE Transactions on Industrial Elec- tronics, 2017, 64(7): 5766-5776. [11] Gacio D, Alonso J M, Garcia J, et al.Optimization of a front-end DCM Buck PFP for an HPF integrated single-stage LED driver[J]. IEEE Journal of Emerging & Selected Topics in Power Electronics, 2015, 3(3): 666-678. [12] 汪飞, 钟元旭, 李林, 等. 基于集成三端口变换器的无电解电容LED驱动[J]. 电工技术学报, 2016, 31(23): 189-198. Wang Fei, Zhong Yuanxu, Li Lin, et al.An electrolytic capacitor-less LED driver based on an integrated three-port converter[J]. Transactions of China Electrotechnical Society, 2016, 31(23): 189-198. [13] 章勇高, 史献冰, 高海文. 一种具有功率耦合电路的无电解电容LED驱动电源[J]. 电力系统保护与控制, 2017, 45(17): 58-64. Zhang Yonggao, Shi Xianbing, Gao Haiwen.A non- electrolytic capacitors LED driver power supply with power coupling circuit[J]. Power System Protection and Control, 2017, 45(17): 58-64. [14] 梁国壮, 田涵雷. 输出电容串联型高增益直流变换器[J]. 电子技术应用, 2018, 44(7): 149-152. Liang Guozhuang, Tian Hanlei.A high-voltage gain DC/DC converter with the output capacitors connected in series[J]. Application of Electronic Technique, 2018, 44(7): 149-152. [15] Yang Yang, Ruan Xinbo, Zhang Li, et al.Feed-forward scheme for an electrolytic capacitor- less AC/DC LED driver to reduce output current ripple[J]. IEEE Transactions on Power Electronics, 2014, 29(10): 5508-5517. [16] Fonseca Z P D, Perin A J, Junior E A, et al. Single-stage high power factor converters requiring low DC-Link capacitance to drive power LEDs[J]. IEEE Transactions on Industrial Electronics, 2017, 64(5): 3557-3567. [17] 曾君, 孙伟华, 刘俊峰. 基于可控开关电容充放电平衡的多路LED驱动器[J]. 电工技术学报, 2017, 32(12): 1-9. Zeng Jun, Sun Weihua, Liu Junfeng.Multi-channel LED driver based on charging and discharging balance of switch-controlled capacitor[J]. Transa- ctions of China Electrotechnical Society, 2017, 32(12): 1-9. [18] Almeida P S, Costa M A D, Alonso J M, et al. Application of series resonant converters to reduce ripple transmission to LED arrays in offline drivers[J]. Electronics Letters, 2013, 49(6): 414-415. [19] 田涵雷, 刘俊峰, 曾君, 等. 基于可控开关电容的定频谐振式多路LED均流驱动器[J]. 电工技术学报, 2019, 34(2): 286-295. Tian Hanlei, Liu Junfeng, Zeng Jun, et al.A resonant multi-channel LED driver with constant frequency based on switched-controlled capacitor[J]. Transa- ctions of China Electrotechnical Society, 2019, 34(2): 286-295. [20] Chi S W, Loo K H, Iu H C, et al.Independent control of multicolour-multistring LED lighting systems with fully switched-capacitor-controlled LCC resonant network[J]. IEEE Transactions on Power Electronics, 2017, 33(5): 4293-4305. [21] Hu Zhiyuan, Qiu Yajie, Liu Yanfei, et al.A control strategy and design method for interleaved LLC con- verters operating at variable switching frequency[J]. IEEE Transactions on Power Electronics, 2014, 29(8): 4426-4437. [22] 刘俊峰, 田涵雷, 孙伟华, 等. 基于可变电感的恒频非隔离型多路LED驱动器[J]. 华南理工大学学报(自然科学版), 2018, 10(3): 231-239. Liu Junfeng, Tian Hanlei, Sun Weihua, et al.A constant frequency, non-isolated, multi-channel LED driver based on variable inductor[J]. Journal of South China University of Technology (Natural Science Edition), 2018, 10(3): 231-239. [23] Liu Junfeng, Tian Hanlei, Liang Guozhuang, et al.A bridgeless electrolytic capacitor-free LED driver based on series-resonant converter with constant frequency control[J]. IEEE Transactions on Power Electronics, 2019, 34(3): 2712-2725. [24] Liu Junfeng, Tian Hanlei, Zeng Jun.Multi-channel LED driver based on switched-controlled capacitor with constant frequency control[J]. IET Power Electronics, 2018, 11(12): 1991-1999. [25] Ma Hongbo, Lai J S, Zheng Cong, et al.A high- efficiency quasi-single-stage bridgeless electrolytic capacitor-free high-power AC-DC driver for supplying multiple LED strings in parallel[J]. IEEE Transa- ctions on Power Electronics, 2016, 31(8): 5825-5836.
2019, Vol. 34 
