在現今的工業界中，返馳式轉換器架構一直是兩百瓦以下轉換器的首選。它的價格低廉，架構又簡單，以致成為它受歡迎的原因。對於高頻切換式電源轉換器來說，功率損耗大部分集中在二次側二極體整流器以及一次側功率晶體導通和截止之切換期間。本論文設計出一台120W之同步整流輸出之返馳式轉換器，此架構適用於低輸出電壓高輸出電流的轉換器，可以讓二次側整流器的功率損耗，能夠明顯地降低。其電路架構之動作原理和設計準則，均會詳細地分析與探討。

Flyback converter topology has been the first choice for conversion below 200W in modern industry. Low cost and simple framework are enough to explain its popularity. Referring to high frequency switching power supply, the power losses mainly concentrate on the rectifier diodes in the secondary side and the MOSFET in the primary side during turn-on and turn-off. In this thesis, a design of 120W flyback converter with synchronous rectification is presented. The topology applied is suitable for applications with low output voltage and high output current. The power losses in the secondary side can be significantly reduced. The detailed operating principles and design criteria for the presented converter are described. Experimental results are given to verify the
theoretical analysis.

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