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Mosfet Driving with darlington transistor

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theasus

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Hi,
Is it possible to drive mosfet gate with darlington transistors pair?Could you propose any schematics?
Thanks.
 

alexan_e

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A darlington transistor is not so different from a simple transistor, it just has a higher current gain and the base-emitter has a higher voltage drop (about 0.6v+0.6v) because inside the darligton the emitter of the first transistor drives the base of the second.

Darlington_configuration.png

So you can use a circuit like
N-Mosfet_driver.jpg
where U3 and U4 will be darlingtons but the high and low voltage output of the totem pole will have a difference of about 1.2v from the input voltage.

Is this what you meant?

Alex
 

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