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《Chinese Journal of Liquid Crystals and Displays》 2010-01
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Research Status and Progress of High Power Backlight LED Driving Circuit

ZHANG Pu-lei,SHI Yong-sheng,SHI Yao-hua,YIN Xiang-lei(College of Electric and Information Engineering,Shaanxi University of Science and Technology,Xi'an 710021,China)  
Taking specific LED driving IC for example,the principle,advantages,disadvantages and performance improvement measures of peak current control,average current control and single-stage single-switch no-isolated LED driving circuit are discussed.The conduction EMI peak and the average test results of LED driving circuit using the jitter frequency technology is given.The work waveform and efficiency test results of LED driving circuit of average current control based on IR2540 are also given.The principle of the pulsed constant current supply LED driving circuit is briefly introduced.At last the meta-analysis about the development trend of LED driving circuit is done from the three aspects of constant current precision,efficiency and cost.
【Fund】: 陕西省教育厅专项研究计划(No.07JK188)
【CateGory Index】: TN312.8
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