Power transistor driver stage with optimally reduced turn-off de

Details Power transistor driver stage with optimally reduced turn-off de Power transistor driver stage with optimally reduced turn-off de

1994-05-31

1995-11-21

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

327108, H03B 100

Patent

active

054690943

ABSTRACT:
A fast-discharge switch is controlled by a comparator sensing the voltage difference between the output node and the input node of a driving integrator stage that controls the slew-rate of a power switching output transistor. The fast-discharge switch turns off automatically when the output power transistor reaches (in the case of a MOS transistor) or exits (in the case of a bipolar transistor) saturation. The circuit of the invention accelerates the discharge thus reducing the turn-off delay and is insensitive of load conditions and does not affect the performance of the integrating (driver) stage that control the slew-rate.

REFERENCES:
patent: 5157351 (1992-10-01), Carobolante
patent: 5194760 (1993-03-01), Braun et al.
patent: 5204562 (1993-04-01), Pace

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