Page Comparison

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• Motor controller capacitors are currently charged with a constant voltage source and series resistor. This is always 50% efficient. For a challenger vehicle, it might be better to have a switching circuit (buck topology) to charge with constant current (which would also be faster).

• Keep to 12V by removing DC DC inversion

• Add hall effect sensor

• Make simpler by removing irrelevant portions (e.g. fan control and thermistor may have been exclusive to MOV since shorts less of an issue?)

Research Summary

• Simplify Isolated DCDCCharge Pump and Depletion Mode FET

  • U4

    • Original parts

      • Charge pump switch regulator

        • https://www.digikey.ca/en/products/detail/microchip-technology/tc7662beoa713/418710

      New Change

      • https://electronics.stackexchange.com/questions/266187/efficient-alternative-to-a-charge-pump-for-stepping-up-a-3v-supply-to-3-3v

        Use synchronous boost converter?

        Depletion mode FET

        • https://www.digikey.ca/en/products/detail/

          texas-instruments

          ixys/

          tps61020drcrg4/1672113

  • U5

    • Original

      • Optoisolator

      • https://www.digikey.ca/en/products/detail/broadcom-limited/HCPL-0211-000E/825261?s=N4IgTCBcDaIBIGEAKAZAtABjARm5jGAoiALoC%2BQA

    • New Change

      • https://electronics.stackexchange.com/questions/582157/alternative-to-optocoupler-in-circuit-design

      • https://electronics.stackexchange.com/questions/389934/automotive-signal-isolation-alternatives-to-optocouplers

        • Inductive coupler

        • RF coupler

        • Capacitive coupler

          • https://www.digikey.ca/en/products/detail/texas-instruments/iso7740fdw/6148234

  • U9

    • Original

      • DC DC Converter

      • https://www.digikey.ca/en/products/detail/xp-power/ISE1212A-TR/5320900?s=N4IgTCBcDaIIwBYDsAGAtGAnAVnXNAcgCIgC6AvkA

    • New Change

      • https://forum.allaboutcircuits.com/threads/dc-dc-converter-alternatives.23964/

      • https://electronics.stackexchange.com/questions/543252/dc-to-dc-converter-options

        • Also use boost converter?

        • https://www.digikey.ca/en/products/detail/texas-instruments/tps61020drcrg4/1672113

        https://www.digikey.ca/en/products/detail/texas-instruments/tps61012dgsg4/1672099

        ixth6n50d2/2183273

    • New Change

      • Find closed switch to replace the two components

        • Solid-state relay

• Smaller changes

  • Removing:

    • Fan control

      • Remove fan connector

      • Remove entire fan control sheet

    • Thermistor

      • Remove thermistor connector

      • Remove entire thermistor sheet

  • Add jumpers near AND gate to skip it

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