A Current Balancing Method for Multi-output LED Drivers

Chen Shu-chen; Zhang Miao; Wu Wen-kang; Tang Xiong-min; Du Si-tao; Wu Yuan

doi:10.3969/j.issn.1007-7162.2013.02.011

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A Current Balancing Method for Multi-output LED Drivers

更新时间：2026-05-27

- A Current Balancing Method for Multi-output LED Drivers
- Vol. 30, Issue 2, Pages: 57-62(2013)
- 作者机构：
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- DOI：10.3969/j.issn.1007-7162.2013.02.011
  CLC：
- Online First：27 June 2013，
  
  Published：2013
- 稿件说明：
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陈树琛, 张淼, 吴文康, 唐雄民, 杜思涛, 吴远. 基于LLC多路LED均流驱动电路的研究[J]. 广东工业大学学报, 2013, 30(2): 57-62.

Chen Shu-chen, Zhang Miao, Wu Wen-kang, et al. A Current Balancing Method for Multi-output LED Drivers[J]. 2013, 30(2): 57-62.
陈树琛, 张淼, 吴文康, 唐雄民, 杜思涛, 吴远. 基于LLC多路LED均流驱动电路的研究[J]. 广东工业大学学报, 2013, 30(2): 57-62. DOI： 10.3969/j.issn.1007-7162.2013.02.011.

Chen Shu-chen, Zhang Miao, Wu Wen-kang, et al. A Current Balancing Method for Multi-output LED Drivers[J]. 2013, 30(2): 57-62. DOI： 10.3969/j.issn.1007-7162.2013.02.011.

摘要

提出了一种基于LLC谐振的多路输出LED均流驱动电路，方案中DC/DC部分采用了LLC谐振，提高了转换的频率，同时能够实现原边开关管的零电压开通和副边整流二极管的零电流关断，减少了损耗，提高了系统的效率.LED的驱动部分采用了平衡电容隔离均流，输出达到很好的均流效果.PSIM仿真和样机测试均证明了该电路的可行性.

Abstract

It proposes a circuit about multi-output constant current LED drivers

based on LLC resonant. The LLC resonant was adopted in the DC/DC circuit

improving the frequency of conversion. The switches on the primary side could work in zero-voltage-switching mode(ZVS)，and the diodes on the secondary side could work in zero-current-switching(ZCS)mode，which decreased the loss of switching and improved the efficiency of the system．The balance capacitor was used in the LED driver circuit

and it was easy to achieve the balance of the current. Meanwhile

a prototype was proposed to test in the laboratory. It focused on the mechanism of the resonant and the balance of the current. The system has been simulated and verified

based on PSIM.

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