Push-pull converter switching power supply circuit diagram

Published:2011/5/5 7:08:00 Author:Nicole | Keyword: switching power supply, push-pull converter | From:SeekIC

Push-pull converter switching power supply circuit. CW494 is a double-ended converter modulator integrated circuits, including error amplifier, voltage reference, clock oscillator, pulse width modulator and other circuits. Transformer T1 is a high-frequency transformer which can transferenergy to the load. T2 is incentive to promote the transformer. It can transmit the two series of drive pulse produced by the CW494 pulse modular to the drive and switch base of the push-pull circuit after amplfied by the driver transistor. L is the transformer windings on the pulse of the sample through the transformer and rectifier AC voltage, the resistance of the sample sent to the pulse modulation circuit CW494 16 feet, as the error amplifier inverting input. The power transistor of this power supply uses F461fast series. Where the voltage feedback, input and output are directly connected. If the input and output need to be isolated, the optocoupler can be used.



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