We got a problem with a specific motor:
With the standard connection one direction of rotation has a significant lower torque and also at 2 specific hall sensor states the current to the coil is switched off !
Changing the connection of the motor coils and Hall sensors ( OUT1-> coil2, OUT2->coil3, OUT3-> coil1 and the hall connections the same) cures the problem.
What is the reason for that ?
There is no hint in the data sheet, no hint in an application note. Also when i tried to get in contact with ST i failed.