power MOSFET gate drive constituted by the transistor and others circuit

Published:2011/6/9 4:31:00 Author:John | Keyword: transistor, power MOSFET gate drive | From:SeekIC

The circuit consists of two forward converters, for which one is the converter to charge the power MOSFET gate capacitor and the other is to discharge its gate capacitor. Recommended power supply voltage is from 12V to 15V. On the rising edge of the driving pulse, VT5 receives the pulse. Referring to given value for Cl and Rl in the figure, its typical duration is 2OOns. Then the pulse is transmitted to the secondary side of transformer Tl. When VT6 and VD3 are all given to a appropriate bias, the sub-pulse would charge the capacitor between the power MOSFET and the source pole. Afterwards, the current path is closed.



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