Hi, I have built 4 VESC 4.10’s and the first two worked great. But the 3rd and 4th suffer the same problem - as soon as I power them up D5, the 5V TVS, makes some crackling sounds and then smokes for a while then finally gives up.
This is because the buck regulator circuit off the DRV8302 is putting out 8v. I assume this is the unswitched output voltage - so the switching part of the switching regulator circuit is not working.
I have replaced all components in that circuit (there’s only like 5 of them) and it did not change. I replaced the DRV8302 and it worked correctly the night before, but the next morning same problem.
Has anyone seen and been able to successfully diagnose this problem?