PWM from MicroController to FET

[dogdens_R]

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

 

[Nigel Goodwin]

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

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

 

[dogdens_R]

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

 

[bmcculla]

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.