If a stepper specs state 1.7A per phase, do i need a 1.7A driver or will a 2A driver work and it will only pull 1.7A from it?

or will the motor not know and draw the full 2A and overheat? in that case would a 1.5A be better?

My driver board has 0.5 / 1 / 1.5 / 2 / 2.5 Amp options ( currently set to lowest 0.5 and works as far as i can see? )

Thanks