BLDC Motor running fine for 1 minute, then stuttering
The IC used on the PCB I have is often quoted as providing 2A ber bridge. According to experiments, in actuality, it may be more like 2x 0.8A, before the thing goes into thermal shutdown, as I already suspected.

Details here:
http://www.maelabs.ucsd.edu/mae156alib/electronics/The-Motor-Driver-Myth.pdf