Case study: MRE 3v shorted to 12v
Posted: Wed Jun 17, 2020 12:41 am
An unplanned MRE experiment was executed: 3v and 12v were shorted and +12v was applied
1) stm32 has definitely not survived that
2) once stm32 was removed, we got 5v produced by TLE8888
3) we also got 3v produced by 3v regulator
once stm32 was replaced with a new part
1) low-side outputs work via TLE8888
2) high-side outputs work via TC4427
TODO check later: see if op-amps have survived or not
1) stm32 has definitely not survived that
2) once stm32 was removed, we got 5v produced by TLE8888
3) we also got 3v produced by 3v regulator
once stm32 was replaced with a new part
1) low-side outputs work via TLE8888
2) high-side outputs work via TC4427
TODO check later: see if op-amps have survived or not