The push-pull switch power supply circuit

Published:2011/6/21 22:23:00 Author:qqtang | Keyword: push-pull, switch power supply | From:SeekIC

The typical circuit of the push-pull switch power supply is shown in the figure, which belongs to the 2-terminal converting circuit, the magnetic core of the high-frequency transformer is working on the two sides of the hysteresis return. The circuit is installed with two switch pipes, VT1 and VT2, the two switches are conducting and blocked in turn under the control of the external motivating square wave signals, the square wave voltage is generated at the second coil of the transformer T, and then the voltage becomes a DC voltage after it is filtered. The virtues of the circuit is that it's easy to drive with 2 switch pipes, and the main weakness is that the withstand voltage has to be the twice of the peak value of the circuit.



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