| Summary: | 碩士 === 國立高雄應用科技大學 === 電機工程系博碩士班 === 96 === Because of the demand of mid-low watt multi outputs, this thesis proposes a switching power supply structure with fly-back topology to design and implement two-output power supply with the rating of 100 W and both 5V/8A and 12 V/5A. With respect to electricity characteristics, output performance that is fully loaded with average efficiency realizes to be above to higher than 85% in the thesis. On the other hand, in order to meet international harmonic standard , Power Factor Correction (PFC) circuit operated in boundary mode is designed with the characteristic of less components and easy control in order to realize the requirement of high power factor of mid-low power supply based on the trade off of cost and performance. Furthermore, this thesis adopts the control IC to keep full load power factor over 0.95 in all voltage range. Final measurement and verification for the proposed prototype and the satisfactory performance are justified.
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