Study on Primary Side Regulation Technique for Flyback Converters

• Main Authors: Yi-Hua Wang, 王奕樺
• Other Authors: Huang-Jen Chiu
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/576b9x

碩士 === 國立臺灣科技大學 === 電子工程系 === 105 === This thesis presents a study on the primary side regulation (PSR) technique for flyback converters and compares with the conventional secondary side regulation (SSR) technique. The eligible primary side regulation techniques for continuous conduction mode (CCM), quasi-resonant (QR), and discontinuous conduction mode (DCM) operations are studied to improve the accuracy of feedback regulation. A laboratory prototype for flyback converters with primary side regulation is implemented and tested under 90Vac to 264Vac input voltage and 19V/45W output specifications. The experimental results are shown for verifying the performance of PSR technique. After the verification of this laboratory prototype, the average efficiency of the converter can reach 87.7%, the no-load power consumption under 0.1W, and the voltage regulation within +/-3%. All the performance indices meet the requirements of mainstream market specifications.