Hi All ;
Actually I finished my PCB design and I printed 5 boards working based on DRV8711 to control stepper motor, I tested almost all the functions , and I got very good results with (256 res. , 24 volt , 3 ampere, 300 khz)
for some reasons the 5 boards don't work anymore (because of soldering and desoldering many times, hard testing and etc.).
Then i decided to print 25 board and ordered 25 pieces of DRV8711 from Chinese supplier, no one of them is working !
Then I ordered 25 pieces of mouser and also no one is working !
It gives me 24 volt directly and continuously on the terminal of the A+,A-,B+,B- or some of them (terminals of the motor) , I tried many solutions and no way
I took into consideration of the soldering conditions, I changed all the capacitors around the IC and still give me like internal short circuit in the 50 pieces of DRV >>
Any support for our team will be very appreciated
there are many videos for our last results but i can not upload all of them