本篇論文主要研製一800瓦個人電腦電源供應器，輸出規格如下：12 V/46 A、3.3 V/24 A、5 V/30 A、-12 V/0.5 A與一組待機電源5 V/3 A。前級使用昇壓型連續導通模式功率因數修正器，用以提昇功率因數和穩定電壓且減少輸入電流的總諧波失真率。DC/DC架構選用全橋相移式零電壓切換轉換器以提供12 V輸出，電路具有零電壓切換特性可減少變壓器一次側開關切換損耗，以及利用同步整流技術降低二次側導通損失。雙組同步降壓型轉換器提供3.3 V與5 V輸出。並設計一返馳式轉換器電路架構，提供待機與輔助電源。
雛型電路的實驗測量結果，驗證了本論文所研究的電源架構與控制方法的可行性，且符合能源之星要求的規範。

In this thesis, an 800-watt power supply for PC is realized. The output specifications of the developed power supply are: 12 V/46 A, 3.3 V/24 A, 5 V/30 A, -12 V/0.5 A with an additional 5 V/3 A standby power supply. A boost continuous conduction mode power factor correction circuit is adopted as the pre-regulator to, raise the input power factor and reduce the input current harmonics. The DC/DC converter is implemented by using a phase-shift full-bridge converter (PSFB) topology to provide a 12 V output. The zero-voltage switching feature reduces the switching loss of primary power switches. The secondary DC/DC stage consists of two synchronous buck converters supplying 5 V and 3.3 V output voltages. The flyback converter is adopted to provide the auxiliary and standby power supply.
Experimental results of a laboratory prototype are shown to verify the feasibility of the developed topology and control schemes. The prototype can substantially satisfy the ENERGY STAR computer program.

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