本篇論文提出應用於符合能源之星5.0規範之節能的交/直流整流器電源模組。此模組的總輸出為90瓦。其中使用了非對稱式半橋轉換器來提供電源19.5V/4.74A;及使用平均電流連續導通模式的主動式功率因數修正電路來降低電源模組的總諧波失真率及提高功率因素。改變以往慣用的升壓式功率校正轉換器輸出電壓至400V的方式,使用降壓功因校正轉換器輸出電壓80V方來取代,以減少切換損失及導通阻抗損失。並將輸出端的整流二極體改為功率晶體同步整流的模式、減少總功率的消耗,以達到高效率節能的目標。
In this thesis, the topic of AC to DC Adaptor power module which conforms to the Energy Star Version 5.0 regulation was raised. The total output of this module is 90 watt. This module uses asymmetrical half-bridge for providing 19.5V/4.74A power, and use active power factor corrector of average current continuous conduction mode to reduce total harmonic distortion and to increase power factor. To reduce the switching loss and conduction loss, the buck power factor correct converter was used for 80V output instead of using the traditional boost power factor correct convertor to providing 400V power output. Furthermore, the rectification diode of output terminal was changed to synchronize rectification mode of MOS FET in order to reach the target of energy saving.