本論文旨在研究薄型化外接式電源供應器，不連續導通模式(Discontinuous Conduction Mode, DCM）升壓型功率因數修正器用做前級穩壓器，來實現高輸入功率因數與消除輸入電流諧波。雙變壓器半橋式串聯諧振轉換器的發展則具有實現高轉換效率與良好的溫度散佈。同步降壓型轉換器為主要提供12V的輸出之主要穩壓器。再分析與詳細探討薄型化電源供應器之操作原則和設計考量。最後研製一台180W薄型化外接式電源供應器。實驗結果顯示此為可實現，研究架構為具可行性。可達成高轉換效率與高功率因數，研究於薄型化電源轉換器。

This thesis aims to study a slim-type external switching power supply. A discontinuous conduction mode (DCM) boost power factor corrector is used as the pre-regulator to achieve high input power factor and eliminate input current harmonics. A dual transformer half-bridge series resonant converter is also developed to achieve high conversion efficiency and good thermal distribution. A synchronous buck converter is used as the post-regulator for providing 12V output. The operating principles and design considerations for the studied slim-type switching power supply are analyzed and discussed in detail. Finally, a 180W slim-type external switching power supply is implemented and tested. Experimental results are shown to verify the feasibility of the studied scheme. High conversion efficiency and high power factor can be achieved with the studied slim-type power converter.

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