The absolutely available switch power supply: Jinxing D2902 power supply

Published:2011/6/10 1:15:00 Author:Seven | Keyword: power supply, Jinxing | From:SeekIC

The oscillating process of switch circuitsThe 9-pin of STR-S6708 the power supply lead, and only when 9-pin is normally supplying power, does the thick film work normally.The VD908 is directly rectified on 220V AC current, and then it is limited by R903 and R917, and filtered by C909. After that, it becomes a DC current of about 8V and is imposed on 9-pin of IC901, so IC901 starts to work, and the switch power supply begins oscillate. Though the energy of the voltage, which is rectified by VD908, is low and can't keep IC901 normally working, when the power supply starts to oscillate, the V2-pin of switch transformer T901 is launching a voltage.



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