Jinxin C7428 power supply

Published:2011/11/21 20:40:00 Author:May | Keyword: Jinxin, power supply | From:SeekIC

C7428 power supply adopts wide voltage design. It can adapt 110V-245V network voltage. It is similar to Toshiba 2500XH power supply. Network input switching circuit In order to adapt11V-245V network voltage, this power supply is designedfor freely switch over voltage multiplying rectifier and bridge rectifier. The power supply adopts multiplying rectifier when network input voltage is lower than 145V. It adopts bridge rectifier when network input voltage is higher than 145V. Network input voltage is firstly rectified by V801, V802to get identification voltage on C808 after low-pass filtering. The identification voltage is added to STR81145's pin 2, 5. If network input voltage is lower than 145V, thevoltage on thetwo ends of C808 is lower. STR81145's pin 2, 3are breaked over. At this time, V803 and C818, C819 make up multiplying rectifier. The circuit has over voltage protection circuit in order to prevent STR81145's error identification.



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