Design and Implementation of an LED Switching Regulator Using Inverse Buck Topology
This paper proposes an LED switching regulator using inverse buck topology to achieve dimming improvement,eliminating spike from diode reverse recovery time and LED string short and dimming short operation and protection.The used pulse width modulation technique is fixed of time adjustment by easily setting the additional elements comprised of a resistor and a capacitor to achieve variable-frequency control under continuous current mode(CCM)or discontinuous current conduction mode(DCM).Recently,LED is largely used in lighting system to save energy and space in human life instead of cold-cathode fluorescent lamps.In order to solve the problem of voltage deviation in each LED string,this paper provides an LED switching regulator to achieve the acceptable current-equalization function,and also solve the problem of voltage deviation in the multi-string panel construction.In this paper,the inverse buck topology is used with constant o? time control IC to implement a LED string panel control to verify the proposed analysis.Finally,the experimental results show good confirm and meet the required specification.
Sheng-Yuan Ou Hong-Hsiang Chang
Department of Electrical Engineering,National Taipei University of Technology,Taiwan
国际会议
Progress in Electromagnetics Research Symposium 2013(2013年电磁学研究新进展学术研讨会)
台北
英文
709-712
2013-03-01（万方平台首次上网日期，不代表论文的发表时间）