Good morning.

I recently burn one of my stepper driver and I want to make sure that my calculations are correct.

a4982, a4988, a5984 stepper drivers have the same equation to calculate max current with V

REF pin:

**ItripMAX = VREF / (8×RS)**
Questions:

One stepper driver have 2 bridges with R

S = 0.05ohm for each, so i supose put in equation 0.05 or 0.1 ohm ?

Stepper motor can handle 2A of current, this means that I

tripMAX shouldn’t cross 1A (because there are 2 bridges) ?

P.S I put 0.65V on V

REF