Hello everyone
I made a prototype of MOSFET control in PWM (120 Hz). This assembly will be installed on a vehicle.
The 4 outputs can drive Resistors, LEDs and an inductive load for output 4 with a maximum current of 10A under 12V.
The piloting is done thanks to a micro-controller under 3.3V.
This circuit works as I want but I would like to know if "industrially" I can keep this diagram.
I have doubts about:
* Should "automotive" grade components be used for the entire assembly in order to limit electromagnetic interference?
* Do I have to switch to P channel MOSFET so that the (+) 12v is not present on the output connectors when the MOSFETs are not driven?
* I use 1 standard optocoupler, 4 outputs, is it better to take MOSFET 'drivers'?
* For the 12v -> 3.3V power supply I plan to use an AP63203WU-7 Q, is this a good choice? I know tha t it can deliver 2Amp, and it's ok for my PCB.
I would be happy if you could advise me of components that would be more suitable for the end use of this assembly without increasing the price of the BOM list too much