290 mOhm on-resistance — the conduction loss number
That 290 mOhm at 11 A is the number to use for worst-case conduction loss in the thermal loop — at 17 A the I²R loss hits about 84 W, which is within the 227 W dissipation limit but leaves little margin for switching losses in a hard-switched topology.
177 nC gate charge — switching-speed budget
Total gate charge is 177 nC at 10 V. That's a moderate Qg for an 800 V, 17 A device — expect a gate-driver capable of sourcing at least 1 A peak to keep switching transitions under 200 ns.