Study and Implementation of a Dimmable LED Driver for General Lighting Applications

• Main Authors: Ming-Yen Wu, 吳明彥
• Other Authors: Tsan-Ming Wu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/2498j3

碩士 === 中原大學 === 電機工程研究所 === 103 === This thesis aims to study the driving and dimming circuits by using the control for high-brightness LED lamps. Conventional LED driver consists of a power factor corrector and a DC/DC converter to achieve high power factor and good current regulation. This thesis studies a single-stage flyback PFC converter to reduce the component count and raise the conversion effi ciency. A twin-bus dimming circuit is also developed to reduce the switch stresses. The operation principles and design considerations of the studied LED driver are analyzed and discussed. A laboratory prototype is designed and tested to verify the feasibility. According the experimental verifications, the overall conversion efficiency can be effectively improved. And dimmingg function is also fulfilled. The operation principles and design considerations of the dimmable LED driver are analyzed and discussed. A laboratory prototype is also designed and tested to verify the feasibility.