Multioutput LED Drivers With Precise Passive Current Balancing
Multioutput LED Drivers With Precise Passive Current Balancing
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具有精确无源电流平衡功能的多输出 LED 驱动器
DOI：
10.1109/tpel.2012.2210562
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发表时间：
2013-03-01
影响因子：
6.7
通讯作者：
Liu, Shirong
中科院分区：
文献类型：
--
作者：
Zhao, Chen;Xie, Xiaogao;Liu, Shirong
在详细阐述了电流平衡的基本概念的基础上，提出了一种改进的电容式无源电流平衡方法。这种方法也可以推广到隔离式多路输出LED驱动器的应用。与有源方法实现多路输出LED串之间的电流平衡相比，无源方法在成本效率和平衡精度方面具有吸引人的优势。宏模型仿真和样机实验结果均验证了该方法的可行性。所提出的方法可以实现精确的平衡在稳态和动态，即使有很大的不同的外围参数。
According to the detailed essential concept of current balancing presented in this paper, an improved passive current balancing method based on capacitive scheme is proposed consequently. This method can also be extended to the application of isolated multioutput LED drivers. Compared with active method to achieve current balancing among the multioutput LED strings, the passive method exhibits its attractive advantages in cost efficiency and balancing accuracy. Both the macromodel simulation and the prototype experiment results demonstrate the feasibility of the proposed method. The proposed method can achieve precise balancing in steady state and dynamic state even with considerably different peripheral parameters.