The power MOSFET isolated gate drive circuit

Published:2011/7/4 22:10:00 Author:Lucas | Keyword: MOSFET , isolated gate , drive circuit | From:SeekIC

In the circuit, the pulse signal of input A and input B is from the TL494 or UC3852 switching power supply integrated controller. T1 and T2 are the pulse transformers, which aim for high-voltage isolation and to enhance the noise immunity to make high power switching circuit work reliably. The duty cycle range of the circuit is 0% to 45%. Power MOSFET switching characteristics are related to gate driving capacity, here VT3 and VT4 use PNP transistors.



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