Bridgeless SEPIC-derived LED Driver without Electrolytic Capacitor for Multistring Application
The widely used multi-stage cascade structure and the employed low-frequency diode rectified bridge in the front-end PFC rectifier,result in the low efficiency of LED drivers.Meanwhile,the electrolytic capacitor with large capacitance is used as decoupling capacitors is also an obstacle to the overall long-term reliability of the LED lighting product.To overcome these limitations,a bridgeless SEPIC-derived AC/DC converter without electrolytic capacitors is proposed in this paper.Furthermore its isolation type is easy to couple with our studied twin-bus configuration for increasing the overall efficiency of LED drivers.A 50-W hardware prototype has been designed,fabricated and tested in the laboratory to verify the converter validity under universal input voltage condition.
H.-B.Ma Q.-Y.Feng T.-J.Zeng X.-H.Yuan
School of Electrical Engineering,Southwest Jiaotong University,Chengdu,Sichuan 610031,China Institute of Microelectronics Technology,Southwest Jiaotong University,Chengdu,Sichuan 610031,China
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
599-603
2013-03-01（万方平台首次上网日期，不代表论文的发表时间）