Ringing switching power supply practical circuit

Published:2011/7/15 22:44:00 Author:Christina | Keyword: Ringing, switching power supply, practical circuit | From:SeekIC

The ringing switching power supply practical circuit is as shown in the figure. The primary winding Np of the transformer is connected with the diode VD, the resistance R and capacitance C, the purpose of this connection method is to release the power of the transformer leakage inductance. That is during the conduction of the switching tube, the current accumulates the power on the leakage inductance, but this power is not transfered to the secondary stage of the transformer as the electric power. So it produces the reverse emf when the switching tube is cutting off, there is the high surge voltage to puncture the switching tube.



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