| Summary: | 碩士 === 崑山科技大學 === 電子工程研究所 === 99 === 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.
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