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LM74610-Q1: startup for automotive application - can we use this diode controller for a centralised Reverse Polarity Protection for the whole car?

user5194759
Prodigy 20 points
Part Number: LM74610-Q1
Other Parts Discussed in Thread: LM74700-Q1

Hey,

we are a startup supporting another startup building up a electric car. We are right now sourcing parts for Reverse Polarity Protection and recognised that we have that protection decentralised for every "device" in the car. Is it possible to make a centralised protection for the whole car and if yes, do you know of a car manufacturer actually doing it like that? 

Thank you!

Gregor

  • 0
    TI__Genius 16305 points
    Hi Gregor,
    Could you please have a look at LM74700-Q1 which is in preview now. This is best suited for battery protection.
    Regards
    Kari.
  • 0 in reply to Karikalan Selvaraj
    TI__Genius 16305 points
    Hi Gregor,

    To follow up further on you question on centralized vs decentralized reverse polarity protection, centralized protection prevents against battery reverse connected (during a repair) and not the modules connected. Decentralized protection is needed so that it prevent against each of the modules inputs reverse connected and not the battery, battery is normally connected, but modules inputs can be swapped and connected during a repair or replacement.

    For example, Take a case of ECU module without reverse battery proection and its inputs reverse connected to battery. This will damage the ECU front end DC-DC converter (Buck ) through its High side and low side FETs body diode.

    Let me know if you require more support.

    Regards,
    Kari.
  • 0 in reply to Karikalan Selvaraj
    Prodigy 20 points
    Hey Kari,

    let me first say a "big thanks" to you. I love how supportive TI Engineers are.

    Yes, I get your point. However, we have heard that there is something like a centralised protection in modern cars. Are there any smart diodes or similar innovations that could have centralised it? Or are today in modern cars still all circuit boards separately protected and we were simply wrong?

    Thank you again Kari!!!

    Best wishes,
    Gregor
  • 0 in reply to user5194759
    TI__Genius 16305 points
    Hi Gregor,

    Let me check on that and get back.

    Regards,
    Kari.