Brushless-DC motors are typically rated for a certain voltage (for example 12 V or 24 V). Operating a motor at a higher voltage corresponds to a lower drive current to obtain the same motor power. Operating at lower voltages generally allows for more accurate control of phase currents. The MCT8316Z functions down to a supply of 4.5V. A higher operating voltage also corresponds to a higher obtainable rpm. The MCT8316Z allows for a range of possible operating voltages because of a maximum VM rating of 40 V.