利用擬似諧振與同步整流的技術提高LED 驅動電力的效能

本論文的方向是將LED應用於節能照明方面的電源系統研究，利用擬似諧振的技術來設計LED驅動電源的功率因素改善部份，及返馳式電路部分，並應用同步整流的技術來改善輸出效率，以達到整體輸入高功因，輸出高效率的LED電源裝置，符合節能的最佳效果。本文利用NXP TEA1752T與NXP TEA1791T之原理並將電路實際驗證，測試結果於輸入電壓為AC110V/AC230V時，加載後所量出的數據，其中包含了輸入電流、輸出電壓、輸出功率、輸入功率、效率與P.F.值。其中效率最高可以達到91.77%，P.F.值最高亦可達到0.98，遠高於一般無運用QR Mode與SR Mode之電源轉換器的P.F.值與效率。

關鍵字

擬似諧振；同步整流

並列摘要

This paper leads to the study of power drive system on LED energy-saving lighting. Its power factor coefficient and fly-back converter performance are improved by designing in the Quasi -Resonant converter. Additionally, the output efficiency is scaling up by the implementation of Synchronous Rectifying technique. Accordingly, the overall performance of high power factor can be achieved in the LED power drive system. A highly efficient LED power driver fits the best interest in complying with energy conservation. The pragmatic experiment is carried out with two controllers- NXP TEA1752T and NXP TEA1791T integrated in the power circuitry. After charging loads at 110Vac/230Vac, several measured data are illustrated, including input current, output voltage, output wattage, input wattage, efficiency and P.F value. It rises to 91.77% among the highest realized efficiency, as well as the highest PF value up to 0.98. In terms of efficiency and PF performance, two technologies engaged power drive system outperforms regularly setup power devices where Q.R mode and S.R mode are not included.