Using a NMOS as High Side Switch for 48V battery
to turn the mosfet on you need to put the gate voltage to be 3.3V above the source voltage. This means that if you want the battery voltage on the source you need more voltage than the battery has on the gate.
these drivers all use capacitors to make the high voltage by adding VCC to it, but it only makes a pulse of charge, so if you're not occasionally turning it off there's a possibity that it'll run out of charge and the MOSFET will start to turn off and possibly overheat.
I'd consider using a P channel mosfet instead.