I have a 12VDC motor I would like to control with an arduino (and a dual VNH5019 controller).
This motor has constant current draw of 14A, but stall current of 40A and inrush of (maybe, I have no way to control this) 150A. It’s a fan taken from a used car. I don’t need to control the direction, only the speed.
Stall current is above the normal operation limit of the polulu driver shield. I don’t even speak about the potential inrush current, which is way above its 60A limit.
My question: do you think that I could use an intermediary MOSFET which will make the high current connection? My setup would be : Arduino >> VNH5019 DUAL >> IRF1405 >> Motor. It would spare me one channel of the controller for another application and help overcome the current limitation. I have some IRF1405 MOSFET (non logic MOSFET, and I can’t find adequate driver here in Africa, that’s why I plan using the VNH5019) with a max current rating of 169A.
Thanks in advance for your opinion,