根據IFA之研究報告，未來大尺寸液晶電視仍是市場的主流。在環保與節能的議題下，創新電源供應的設計也將成為未來勝出的關鍵，因此消費性電子產業將面臨新技術及新概念的挑戰。
本篇論文主要目的是研製適用於大尺寸液晶電視的數位化電源，整體系統架構可分為三個主要部分：前級使用交錯式連續導通模式操作的功率因數修正電路作為前置調節器，以改善功率因數並減少輸入電流之總諧波失真。後級則使用以Microchip dsPIC30F2020為數位控制核心的LLC串聯諧振轉換器，以達到數位變頻控制、減少元件成本及提供更彈性的設計之目的，最後採用一組返馳式轉換器作為待機及輔助電源。藉由數位方式實現PID控制器，完成液晶電視的數位化電源。實驗結果證實所提出系統之可行性。

According to a report from IFA (International Funkausstellung Association), large size LCD TV is expected to become the mainstream of the near future. The requirement of larger size LCD panel places new challenges and requirements in TV power architectures. These trends are dictated by the need for lower power losses, lower EMI and reduced costs. The choice of appropriate topology for the main power stage is dependent on factors such as power level and output requirements. While the flyback approach is very popular, the LLC half-bridge converter provides significant reduction in power losses and is relatively simple in that it does not require output inductor. These benefits make it a convenient choice for the high power LCD TV power supply design.
The main purpose of this thesis is to research and implement a digitalized power supply for large scale LCD TV. The whole system configuration can be divided into three major parts. An interleaved continuous conduction mode power factor corrector in front stage is used as pre-regulator for improving the input power factor and reducing the total harmonic distortion. The dsPIC30F2020 from Microchip corp. is used as the digital variable frequency controller of LLC series resonant converter. The advantages of the digital controller include components cost reduction and more flexible design. Finally, a flyback converter is adopted as standby and auxiliary power supplies. Experimental results will be given to validate the correctness of the proposed system and some simple conclusions will be made.

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