Transistor drive circuit

Details Transistor drive circuit Transistor drive circuit

H - Electricity

03

K

323/4, 330/43

H03K 17/04 (2006.01) H03K 17/0412 (2006.01) H03K 17/60 (2006.01)

Patent

CA 1173919

ABSTRACT OF THE DISCLOSURE A drive current circuit for a switching power transistor which allows the controlled turn off of the transistor without affecting transistor turn on. The drive transformer has two cores one of which follows a linear magnetization characteristic and the other of which has a relatively high permeability. The input and output windings of the drive transformer are wound on both cores. A turn off winding is also included which is wound only on the high permeability core. A source of turn off charge is directly coupled to the transistor. Shorting of the turn off winding initiates the controlled turn off of the transistor.

394027

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