Can anyone please explain (or suggest online reading that explain) what factors have to be taken into consideration when driving a power MOSFET with a PWM signal for power control such as motor speed or power supplies, especially at the gate?
I understand that a MOSFET gate is essentially an open circuit at low frequencies, but at higher frequencies, capacitive effects modify the necessary drive power and switching times (and possibly other things). Simple hobby-type circuits often drive the gate with resistive coupling from an opamp or something with a similar output, but more sophisticated circuits usually include capacitors, diodes and inductors between driver and MOSFET. Please help me understand the principles.