Design and Implementation of a Current-balancing Circuit for LED Security Lights


Vol. 12, No. 6, pp. 869-877, Nov. 2012
10.6113/JPE.2012.12.6.869


PDF    

 Abstract

This paper presents a current-balancing circuit for security lights that uses parallel-connected LEDs. The parallel connection of LEDs causes current differences between the LED strings because of characteristic deviations. These differences can reduce the lifespan of a particular point of LEDs by thermal spotting. They can also cause non-uniform luminance of the lighting device. Among the different methods for solving these problems, the method using current-balancing transformers makes it easy to compensate for current differences and it has a simple circuitry. However, while the balancing transformer has been applied to AC light sources, LEDs operate on a DC source, so the driving circuitry and the design method have to be changed and their performances must be verified. Thus in this paper, a design method of the balancing transformer network and the driving circuitry for LEDs is proposed. The proposed design method could have a smaller size than the conventional design method. The proposed circuitry is applied to three types of 100-watt LED security lights, which use different LEDs. Experimental results are presented to verify the performance of the designed driving circuits.


 Statistics
Show / Hide Statistics

Cumulative Counts from September 30th, 2019
Multiple requests among the same browser session are counted as one view. If you mouse over a chart, the values of data points will be shown.



Cite this article

[IEEE Style]

K. Jung, J. Yoo, C. Park, "Design and Implementation of a Current-balancing Circuit for LED Security Lights," Journal of Power Electronics, vol. 12, no. 6, pp. 869-877, 2012. DOI: 10.6113/JPE.2012.12.6.869.

[ACM Style]

Kwang-Hyun Jung, Jin-Wan Yoo, and Chong-Yeun Park. 2012. Design and Implementation of a Current-balancing Circuit for LED Security Lights. Journal of Power Electronics, 12, 6, (2012), 869-877. DOI: 10.6113/JPE.2012.12.6.869.