[WIP] Contactor Driver Board

Includes:

• HF/AC, transient spike and reverse polarity protection for 12V power

• Bipolar Voltage Detection Circuitry

  • Voltage divider to measure current across precharge resistor * If current is nearing zero, EN_CURR (current sense amp output voltage) will drop significantly, which will close the PMOS and short 12v to the contactor power connector.

• Precharge Contactor Control

  • PMOS controlled by current sense amp (see above)

    • Controls 12V connection

  • NMOS controlled by dashboard

    • Controls GND connection

Current Schematic:

Open

Current PCB Layout:

Open

Current 3D Model:

LED Purposes -D1: Green LED used to indicate 12V board power -D2: Green LED used to indicate contactor status -D3: Green LED used to indicate precharge circuit status

Dimensions: 100mm x 66mm