A Modified Silicon Controlled LED Driver Topology

• Main Authors: Ciao-AnYang, 楊喬安
• Other Authors: Lu,Wei-Ting
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/96573336295462768717

碩士 === 國立高雄應用科技大學 === 電機工程系博碩士班 === 103 === For improving traditional silicon controlled circuits, a new type of modified silicon controlled LED driver topology is proposed in this paper. In order to reduce the power consumption of the control branch in the driver circuit, the current amount flowing in the control part is decided by the LED’s working in turn-on or turn-off. The proposed circuit can control branch current effectively. Silicon Controlled Rectifier controls LED’s turning on, while using Optical Coupler to change the controlled branch’s equivalent resistance and reduce the branch element’s power consumption. For reducing the chance of component damage, we use a constant current protection device at the same time.