I'm building a remote starter for an old diesel vehicle and I've settled on using a mosfet for switching the starter/ignition on and off mostly due to pricing and availability. I've spent all morning searching for a suitable circuit example to drive the selected mosfet (CRMICRO CRSS052N08N) but I cant decide on the best and safest way to switch the mosfet.
I have 12v power from the vehicle battery available and the microcontroller is an esp32 which uses 3.3v HIGH signals (esp32 datasheet specifies appx 2.6-2.7v for HIGH output voltage)
Since this will be controlling a vehicle starter motor I would prefer it to be non inverting for some added safety so using another low level bjt/mosfet isn't viable
These will be manufactured in limited batches on a regular basis so keeping circuit as simple and cheap as possible is preferable
I'm leaning on the opamp side which seems to be how large mosfet drivers work if I'm correctly understanding what I've read about them, but the issue I have here is Im not sure which datasheet values Im looking for to select an appropriate opamp for the selected mosfet (CRMICRO CRSS052N08N)
Any help or even general advice is appreciated!
I have 12v power from the vehicle battery available and the microcontroller is an esp32 which uses 3.3v HIGH signals (esp32 datasheet specifies appx 2.6-2.7v for HIGH output voltage)
Since this will be controlling a vehicle starter motor I would prefer it to be non inverting for some added safety so using another low level bjt/mosfet isn't viable
These will be manufactured in limited batches on a regular basis so keeping circuit as simple and cheap as possible is preferable
I'm leaning on the opamp side which seems to be how large mosfet drivers work if I'm correctly understanding what I've read about them, but the issue I have here is Im not sure which datasheet values Im looking for to select an appropriate opamp for the selected mosfet (CRMICRO CRSS052N08N)
Any help or even general advice is appreciated!