具功率因數修正之LLC半橋筆記型電腦電源轉換器

Abstract

此篇論文主要討論LLC諧振電源轉換器，電路架構包含前級功率因數校正電路以及後級半橋式LLC諧振直流/直流轉換電路。前級功率因數校正電路將升壓電感操作在不連續導通模式來達到功因校正之功能。後級之LLC諧振電路則具有一次側開關零電壓切換、二次側整流二極體零電流切換的高轉換效率特性。實驗結果電源轉換器擁有最高效率93.2%，及滿載時功率因數達到0.96以上。

This thesis presents a LLC resonant adapter consisting of a front-stage power factor correction circuit and a second-stage half bridge DC-DC converter. The PFC circuit works in discontinuous conduction mode to correct power factor. The second-stage LLC resonant circuit has high conversion efficient characters of zero voltage switching on primary power switches and zero current switching on secondary rectifiers. The experiment result shows that the adapter has the highest efficiency at 93.2% and PF is above 0.96 as full load.