Grid Electrode Driving Circuit With Shortening Turn-Off Time

Published:2011/8/23 23:39:00 Author:Robert | Keyword: Grid, Electrode, Driving, Shorten, Turn-Off, Time | From:SeekIC

The picture shows the grid electrode driving circuit with shortening power MOSFET turn-off time. In the circuit shown in picture (a), the transistor VT1 and VT2 are make up the push-pull driving circuit with low output impedance. When the VF1 is conducted and the VD1 is disconnected, it would be through the grid resistance RG to charge the VF1's input capacitance Ciss. The RG limits its peak current. The VF1 turn-off time driving circuit would absorb the grid current and the diode VD1 would be conducted to short the RG. Thus the Ciss would discharge with a large current. So the electric charge stored in the grid electrode would be released rapidly. The picture shows the grid electrode driving circuit with shortening turn-off time.



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