Gate Driver as Amplifier?

[TheBaconWizard]

Do I assume that a MOSFET driver is designed (internally biased) only to switch from a PWM signal and that if I have it a sine wave i’d Just get worse switching?

In other words, it ain’t an amplifier?

[owiecc]

Gate driver is basically a buffer with low output impedance. Some gate drivers are just two transistors, but most will have some additional control. If you apply a slow varying input signal you will probably get the same problems as any other digital logic connected to that signal. You may experience noise on the output close to the threshold voltage of your gate driver input. Other than that a sine wave should be ok. Do you have a specific gate driver in mind?

[TheBaconWizard]

Yeah, been looking at this one:

https://www.mouser.co.uk/ProductDetail/634-SI8274AB1-IS1

[Bassman59]

Yeah, been looking at this one:

https://www.mouser.co.uk/ProductDetail/634-SI8274AB1-IS1

That part is designed to take logic inputs and do level translation (up to driver rail supply) and buffering for high output current. It has Schmitt trigger inputs so feeding it with a sine wave will just give you high-level outputs toggling at the input signal frequency.

[b_force]

You can use it as a Class-D type amplifier.