540 B

KNOWN BUGS:

Critical

  • Tie U2 pin 3 to GND to ensure 50% duty mode
  • More resistance for thermistor so battery protect IC doesn't shut off
  • DNP R30 and D1
  • Battery reverse polarity protection not functional, short out Q10, Q11, Q12, Q13 and mind polarities when populating batteries.
    • HW Revision: replace with N-Fet Source to Vbat+, Gate to Vbat-

Minor

  • HW revision: enlargen board size by 1mm and EMI gasket/spring to keep it in place in casing
  • HW revision: add copper pads for front and back panel to fully earth case