I’m using the DRV8834 driver to drive a stepper motor with rated voltage of 2.8v and rated current 2A.
I planned to set the current limit to 1.9A ( where DRV8834 can handle it with cooling ) to have the required torque and the voltage is 5v .
Where I plan to use it only on Full step mode only I set the current limit using the following equation Vref= ((Current/.71) *.5 ). But when I check the current through the coil it is only about 1.56 A and if I tried to increase the Vref to a higher level the current through the coils wouldn’t increase !! .
So could you please advise ?