# Stepper motor drive supply voltage

I am going to use the SM42HT47-1684A stepper motor, its datasheet is following: http://p.globalsources.com/IMAGES/PDT/SPEC/001/K1052328001.pdf

In the datasheet the rated voltage of the motor is 2.8 V.

I found a drive chip, which can achieve the required resolution, it is the following: http://www.st.com/web/en/resource/technical/document/datasheet/CD00255075.pdf

The minimum motor supply voltage in the drive chip is 8V. Does this mean, that the motor can't be directly driven from this chip? I have chosen this chip, because I'm going to use microstepping with 1/32 or 1/64 resolution. Is it recommended to look for an other drive with lower motor supply voltage?

• Stepper motors are normally driven with a chopping current regulator operating at several-to-many times their steady-state supply voltage rating (but not exceeding their insulation rating, of course). Commented Mar 21, 2014 at 18:45

In other words $V = I \times R = 1.65 \times 1.68 = 2.77V$