Multioutput LED Drivers With Precise Passive Current Balancing

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 me...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2013-03, Vol.28 (3), p.1438-1448
Main Authors: Zhao, Chen, Xie, Xiaogao, Liu, Shirong
Format: Article
Language:English
Subjects:
Accuracy
Applied sciences
Brightness
Converters
Convertors
current control
Electric currents
Electrical engineering. Electrical power engineering
Electrical machines
Electronics
Exact sciences and technology
Impedance
Input output
Light emitting diodes
light-emitting diodes (LEDs)
Lighting
Optoelectronic devices
passive circuits
Precision
Regulation and control
Reliability
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Simulation
Vehicles
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Summary: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.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2012.2210562