A4988: Is the equation Current Limit = VREF × 2.5 also true for VDD =3.3V

Is the equation “Current Limit = VREF × 2.5” for setting the stepping motor current limit also true for the A4988 motor driver if I use VDD =3.3V (from a Raspberry Pi) for the logig voltage of the motor driver ?

If not, wich equation I have to use for the current limit setting of the stepping motor when I use 3.3 V for the motor drive logig (VDD).


The equation works for any valid VDD voltage, but if you change the VDD, you will need to reset the current limit with the new VDD.