PWM from MicroController to FET

Hi,

I am trying to do and ESC and I just want to ask if the PWM signal from a micro-controller can used directly on the gate of an FET? Or do I need a driver IC in between?

Thanks

dogdens_R said:

Hi,

I am trying to do and ESC and I just want to ask if the PWM signal from a micro-controller can used directly on the gate of an FET? Or do I need a driver IC in between?

Thanks

Click to expand...

I don't do much with FET's, but as long as it's a logic level FET it should be OK.

how do you tell if its a logic level FET? what do i look out for in the fet datasheet?

Most logic level FETs wil have it listed in the "features" section right at the top of the datasheet. If you want to see if a FET will work at logic levels just look for the gate voltage vs Rdson graph. This graph will tell you how low the resistance is at a given gate voltage. If the given Rdson is okay for your gate voltage then the FET will work.