I'm designing a spot welder using a high-current car starter battery, and a handful of N-channel mosfets of the given type (IRFZ44N, datasheet1, datasheet2). A microcontroller (through some drive logic, probably another mosfets) sends a short pulse to open and close the gates of the power mosfets in parallel (I mean all the gates, sources and drains are connected, making one cheap "supermosfet" from 10 mosfets), sending a high-current pulse to the spot welder's pins.
Since the fets dissipate most of the power in transition (either its resistance or the current is negligible otherwise), I want to open and close them very fast. For that I need to charge and discharge the gates, and for that I need to know what is a reasonable current to do that. Fast transition also helps with balancing out small differences among the mosfets. (10 pcs in parallel, with 160 or 200A pulse current depending on the datasheet per piece, and the battery supposedly can provide around 3-400A)
The datasheets (linked above) didn't help me. Any idea how much current can I use?