Page Comparison

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• Simplify Charge Pump and Depletion Mode FET (U4)

  • Original parts

    • Charge pump switch regulator

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

    • Depletion mode FET

      • https://www.digikey.ca/en/products/detail/ixys/ixth6n50d2/2183273

  • New Change

    • Find closed switch to replace the two components

    • Part requirement

      • Normally closed relay

        • Form B (Form C can work)

        • https://forum.digikey.com/t/understanding-form-a-form-b-form-c-contact-configuration/811

      • Support

        • 151.5V + safety factor (x1.5) [227.27V]

        • 0.5A

        • Ratings at 60C

      • Controllable

        • Can close on-demand or

        • Closes when car close

  • Part Search

    • Implementation routes

      • For lower current parts

        • Add a series resistor to discharge path for lower current

        • Drawback

          • Slower to discharge (0.25s)

          • For lower voltage parts

      • Use relay in parallel

        • Less preferrable

        • Drawback

          • Expensive

          • May not share load equally (reduce one relay lifespan quicker)

    • Types of relay

      • http://www.electricalterminology.com/types-of-relays/

      • https://www.electronicshub.org/classification-of-relays/

    • Solid-state relay

      • https://www.digikey.ca/en/products/detail/panasonic-electric-works/AQZ404/646386

        • AQZ404

        • 400V and 0.5A (0.3A at 60C)

        • Datasheet below

        • https://www.mouser.ca/ProductDetail/Panasonic-Industrial-Devices/AQZ404?qs=Wn4D5qJAqBJmKpb9gy8Awg%3D%3D (mouser link)

        • Need lower current part implementation

        • Form B (Normally closed)

      • https://www.digikey.ca/en/products/detail/panasonic-electric-works/AQZ104/646370

        • AQZ104

        • 400V and 0.6A (~0.4A at 60C)

        • https://www.mouser.ca/ProductDetail/Panasonic-Industrial-Devices/AQZ104?qs=wKtUvITRiakdB78b%2F5Uijg%3D%3D (Need to wait till August for parts to ship)

        • Form A (Normally opened)

      • https://www.digikey.ca/en/products/detail/panasonic-electric-works/AQZ206G2/9597209

        • AQZ206G2

        • 600V and 1A (~0.6A at 60C)

        • Datasheet below

        • https://www.mouser.ca/ProductDetail/Panasonic-Industrial-Devices/AQZ206G2?qs=w%2Fv1CP2dgqpfmR1EUJ61AQ%3D%3D (Need to wait till September for parts to ship)

        • Form A (Normally opened)

  • Implementation plans

    • Existing parts

      • Remove

        • Charge pump and corresponding capacitors (C11, C12, C13, U4)

        • Series Resistor (R19)

      • Depends on parts

        • Pull-down resistor (R21)

        • Zener diode (D8)

      • Keep

        • LED and resistor (LED5 + R43)

    • Schematic

      • Q1 and Q2, replace with single relay

        • https://www.mouser.ca/ProductDetail/Panasonic-Industrial-Devices/AQZ104?qs=wKtUvITRiakdB78b%2F5Uijg%3D%3D

          • Cheaper ($12-16)

          • In stock

          • Current rating may not be enough at 60C

        • https://www.mouser.ca/ProductDetail/Panasonic-Industrial-Devices/AQZ206G2?qs=w%2Fv1CP2dgqpfmR1EUJ61AQ%3D%3D

          • More Expensive ($30)

          • Have to wait

          • Enough current rating

        • Note: May not implement if not enough space

      • Q3, use relay (AQZ404) with series resistor

        • https://www.mouser.ca/ProductDetail/Panasonic-Industrial-Devices/AQZ404?qs=Wn4D5qJAqBJmKpb9gy8Awg%3D%3D

        • Needs to be done

          • If approved, should buy early

  • Pre-charge timing

    • Using 270 uF Cap MC

    • 300 ohm

    • 500 ohm

• Out of stock IC

  • IC Load Switch

    • OOS

      • NCP45521IMNTWG-H

        • https://www.digikey.ca/en/products/detail/onsemi/NCP45521IMNTWG-H/5257785?s=N4IgTCBcDaIHIGEAKAWArGsBGAkgWTgBUB1AcQFoAJEAXQF8g

        • https://www.mouser.ca/ProductDetail/onsemi/NCP45521IMNTWG-H?qs=72ObqG5T4UZ6w73ghQANGg%3D%3D

    • Alternative

      • NCP45770IMN24TWG

        • https://www.digikey.ca/en/products/detail/onsemi/ncp45770imn24twg/12180092

  • CAN Controller

    • OOS

      • MCP2515T-I/ST

        • https://www.digikey.ca/en/products/detail/microchip-technology/MCP2515T-I-ST/593682?s=N4IgTCBcDaILIGEAKYCsBGVAVAtASQHoBlLEAXQF8g

        • https://www.mouser.ca/ProductDetail/Microchip-Technology/MCP2515T-I-ST?qs=uMUszenkLLIwkGYxhCCgRQ%3D%3D

    • Alternative

      • MCP2515-IE/P

        • https://www.mouser.ca/ProductDetail/Microchip-Technology/MCP2515-I-P?qs=hklUZQQMghMXVOd4j8inGA%3D%3D

        • Note: Through-hole

        HI-3111PSIF

        • https://www.digikey.ca/en/products/detail/holt-integrated-circuits-inc/HI-3111PSIF/3585724

  • CAN Reciever

    • OOS

      • TCAN332DR

        • https://www.digikey.ca/en/products/detail/texas-instruments/TCAN332DR/5823563?s=N4IgTCBcDa4JwDYC0AWAzAdgIxabgcgCIgC6AvkA

        • https://www.mouser.ca/ProductDetail/Texas-Instruments/TCAN332DR?qs=n%252BTO0c4TDSYIUeM9WmVMtA%3D%3D

    • Alternative

      • MCP2551T-I/SN

        • https://www.digikey.ca/en/products/detail/microchip-technology/MCP2551T-I-SN/509535

  • Optoisolator

    • OOS

      • HCPL-0211-000E

        • https://www.mouser.ca/ProductDetail/Broadcom-Avago/HCPL-0211-000E?qs=xnajaXqBF9%252BJAicV1wntGA%3D%3D

    • Alternative

      • HCPL-0211-500E

        • https://www.mouser.ca/ProductDetail/Broadcom-Avago/HCPL-0211-500E?qs=xnajaXqBF9%2FtZ67k7S1qGw%3D%3D

• Smaller changes (Check with)

  • 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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• IC Load Switch

  • NCP45770IMN24TWG

    • https://www.digikey.ca/en/products/detail/onsemi/ncp45770imn24twg/12180092

    • https://www.mouser.ca/ProductDetail/onsemi/NCP45770IMN24TWG?qs=7MVldsJ5UayF2EDms7TgPA%3D%3D

• CAN Controller

  • MCP2515MCP2515T-I/PSO

    • https://www.mouser.ca/ProductDetail/Microchip-Technology-Atmel/MCP2515-I-PSO?qs=hklUZQQMghMXVOd4j8inGA%3D%3D

    • Note: Through-hole

  • HI-3111PSIF

    • https://www.digikey.ca/en/products/detail/holt-integrated-circuits-inc/HI-3111PSIF/3585724

  • MCP2515-I/SO

    • https://www.amazon.ca/Baoblaze-Module-MCP2515-Shield-Arduino/dp/B079MD3X4J/ref=dp_prsubs_3?pd_rd_i=B079MD3X4J&psc=1

  • • KwArPi4cUogGDbGnphOvtQ%3D%3D

      • Present in the bay but OOS

• CAN Reciever

  • MCP2551T-I/SN

    • https://www.digikey.ca/en/products/detail/microchip-technology/MCP2551T-I-SN/509535

• Optoisolator

  • HCPL-0211-500E

    • https://www.mouser.ca/ProductDetail/Broadcom-Avago/HCPL-0211-500E?qs=xnajaXqBF9%2FtZ67k7S1qGw%3D%3D

    • Same as HCPL-0211-000E

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