Multioutput LED Drivers With Precise Passive Current Balancing

作者：Zhao, Chen^*; Xie, Xiaogao; Liu, Shirong

来源：IEEE Transactions on Power Electronics, 2013, 28(3): 1438-1448.

DOI：10.1109/TPEL.2012.2210562

• Converters
• current control
• light-emitting diodes (LEDs)
• passive circuits

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.

• 出版日期2013-3
• 单位杭州电子科技大学