+12V, 0.5A single chip switching power supply circuit

Published:2011/7/12 21:27:00 Author:TaoXi | Keyword: +12V, 0.5A, single chip, switching, power supply | From:SeekIC

The +12V, 0.5A single chip switching power supply circuit is as shown in the figure. The output power is 6W. When the input AC voltage is in the range of 110～260V, the voltage relative regulation Sv≤1%, when the load current changes greatly, the load relative regulation SI=5%～7%. In order to simplify the circuit, we use the basic feedback mode. After you connect the power, the 220V AC is bridge type rectified and filted by C1 firstly to get the +300V DC high voltage, then it supplies the operating voltage to WS157 through the primary coil N1 of the high frequency transformer.



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