Page Comparison

PD validation update + lessons learned @jenna k

• Power rails were up at first, encounter smoke

• Observed current spike on display of pwr supply, board started smoking

  • Intermittent issue, happened 3rd time immediatly but not first 2

  • Zener diode was shorted between pwr/gnd

  • Something else was smoking but it still works

• 3v3 from CB was at 1.8V

  • 12V*0.042A = 0.5W

  • Replaced CB connector which fixed the issue

• 5v outputs 5v5, should be 5v2 based on FB

• In the future to set low current limit when powering boards

Update from ASC @Jonathan Xie

• Basically okay, small brained some things but we good?

• Stated only issue was can’t power steering and drive

LV Power Distribution

• Quiescent draw of AFEs from main pack

Current sense architecture @Soumav Maiti @Mitchell Ostler

• Pass relay power through for cutoff

MCI/transition to drive state @Forest Zhou @Mitchell Ostler

Press button to drive, what happens?

• Enable HSD to MCI

• MCI triggers precharge start

• Precharge closes motor contactor once complete

• MCI reads precharge complete

• Drive mode indicator comes on in CC