“ We could remove the DC-DC, replace the HV FETs with solid-state relays, and use a Hall Effect current sensor to detect the end of precharge. Everything would be isolated from HV, so we wouldn’t need an isolated 12V rail.
Or we could just add a forward-biased diode in series with the DC-DC input. ”

List:

Remove DC-DC

• It is not needed as we don’t need the isolated 12V rail

• Find out if every single thing for the 12V is removed or just some

  • What will replace ISO_12V and ISO_12V_SW

...

• Remove entire middle section with Hall Effect Current Sensor

  • Must connect to IN+ and IN-

    • Unsure if AND gate and MOSFETs need to be changed

• Part search

  • https://www.digikey.ca/en/products/detail/allegro-microsystems/ACS756SCB-050B-PFF-T/5400760

  • https://www.digikey.ca/en/products/detail/lem-usa-inc/HO-8-NP-0000/4331974

Top Sheet Connections Changes:

• ISO_12V_SW (remove?)

• IN+ (Stay)

• IN- (Stay)

• ISO_LATCH_OUT (remove?)

• ISO_GND (Stay)

• ISO_12V (remove?)