17W PC Standby Power Supply Circuit of 5V and 3.3 V Output

Published:2011/6/14 13:11:00 Author:Michel | Keyword: 5V , 3.3 V, Standby Power Supply | From:SeekIC

The picture 3 shows the PC standby circuit which provides both 5V，2A and 3V，2A 's main output.This power supply adds 15V，30mA's auxiliary output with lowest cost.This circuit uses a TOP232Y type singlechip power supply and its total output supply is 17.05W.DC input voltage range is 200～375V. 110V AC 220 / fixed input voltage can be chosen as long as it isconnected to commuting filter and it is unnecessary to add voltage multiplier to commutate 110V AC.This design fully takes TOP232's advantages such as soft start, voltage protection, strictly limited flow characteristics and high switching frequency and its advantages make the high-frequency transformer choose EE19 type chip.



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