Hi everyone,

When you turn a MOSFET on/off there is a very small amount of power required to do so. I'm given the amount of charge needed to turn on the MOSFET, Vgg (assume it is a step voltage).

Does anyone know how I would go about calculating how much power is lost trying to turn on the MOSFET?

 

The energy (not power) is simply q*V where q is the total gate charge and V is the charging voltage. It's independent of the risetime of the waveform. The power is energy per unit time or q*V*f where f is the frequency of the drive signal.

 

Thanks for the help!

Can't believe I didn't see that before.

Power = Energy/Time so Energy = qv and then it happens a lot of times every second so you multiply it by the frequency to get energy/time