Power Integrated Circuit Design of 110V AC/5V DC Transformerless Converter

• Main Authors: Yi-Chang Chen, 陳怡成
• Other Authors: Lon-Kou Chang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/43029311838957060170

碩士 === 國立交通大學 === 電機與控制工程系 === 90 === A design of 110V AC/5V DC transformerless converter power integrated circuit is proposed. Three design scheme of converter are proposed and their structures are categorized into two types. For the typeⅠdesign, only one stage of AC/DC converter is employed. This scheme is simpler, but the output voltage ripple is wholly the same as the traditional full-wave rectifier. For the typeⅡdesign, two scheme are proposed. The first scheme contains only one stage too. The output voltage ripple is reduced a lot. However, the power dissipation is very large (7.5W). The second scheme add one more DC/DC converter to reduce the power dissipation and to improve the output voltage ripple. The design uses no transformer and inductance. The output rating 5V+10%~ 5V-10%and 100mA.The power transfer efficiency is 40%.