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  • Required rework to test with 12V - needed to modify resistor dividers
  • Connectors are great and really useful when testing a board
  • 0 ohm resistors are great for disconnecting things and changing resistor values
  • Resistor dividers need to be biased towards IN- (increase R13)
    • Need to tune values - greatly influences time precharge takes
  • Need to add a decoupling/bulk cap between HV relay 12V and GND to reduce ripple - 10uF seems to work fine

Rev 2 Testing

To ensure proper functionality and that nothing in the car is negatively affected by the board, these tests should be completed prior to the final revision

  • Noise in the 12V line when the relay is on
  • Voltage droops when the relay switches
  • Test for noise in the isolated DCDC
  • Pre-Charge sometimes doesn't happen when the circuit is turned off then turned on again before the capacitor is fully discharged, this should be further looked into