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

Support Motor controllers/drivers and motors
1

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).

2

Hello.

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.

Grant