ADuM1200 drive MMBF170L mosfet

Hi, this is my original circuit, use optocoupler to drive the MMBF170L MOSFET, now, I want to replace the optocoupler with ADuM1200 chip.

Hi,

how fast do you want to turn on/off Q6?

ADuM1200's output impedance is around 60-70 ohm. 

if 10K ohm is exactly value for R113 in your application, ADuM1200 can turn on Q6 well.

Chris

Hi, Very thanks for your helps.

Could you kindly helps to take a look my modified circuit again.

The Q6 on/off frequenty is very very low, most of time, Q6 keep ON or OFF state without no change, only in some time, Q6 need change state once.

My analysis is ADUM1200 chip can drive mosfet work well, just due to I never used it before, so, have a littlt bit worry about it, it is very helpful if you can helps to affirm this.

Weidong.

You might also consider the ADuM1240/45 since the switching frequency is low. These micropower isolators have longer prop delay and a more restricted power supply range, but static power dissipation can be as low as a few µA. The ADuM1240 has a default high output state when the input supply is disabled, while the ADuM1245 is default low.

You might also consider the ADuM1240/45 since the switching frequency is low. These micropower isolators have longer prop delay and a more restricted power supply range, but static power dissipation can be as low as a few µA. The ADuM1240 has a default high output state when the input supply is disabled, while the ADuM1245 is default low.