VMOS tube switching power supply application circuit (3)

Published:2011/7/12 2:33:00 Author:TaoXi | Keyword: VMOS tube, switching, power supply, application circuit | From:SeekIC

The VMOS tube switching power supply application circuit is as shown in the figure, it is designed as one kind of push-pull switching power supply which uses the TL494 switch integrated circuit component as the control circuit. In the figure, the TL494 is used as the control circuit of the power supply, in addition to being the oscillation outside source, it is also responsible for the task of adjusting and stabilizing the output voltage. The oscillation frequency is decided by the external components R1 and C1. The switching frequency of this power supply is 100kHz. The VD1 and VD2 are the isolation diodes, the operating voltage is 33V. T is the push-pull output transformer, the primary center tap of it is connected with the DC 12V input power supply. The secondary stage is connected with the output bridge rectifier circuit. The output filter is composed of the current choking coil and the filter capacitance C3.



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