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Schematic check and advice for 24V 90A BMS gate driver

Category: Hardware
Product Number: LTC7000A

Hello.

I am building a gate driver circuit for a 24V 90A BMS for a drone battery application. Please could you check over my circuit and see if it looks fit for my use case and if there are any schematic changes modifications needed. Mainly as the smaller footprint the better as it is going onto a board as small as possible. I mainly built this based on the 48V train BMS documentation you have at Analog.

This is connected directly across the 24V battery pack power so I am unsure what kind of capacitiance and protection the LTC7000 requires for this application? 

Also, should the resistors on the ISNS lines both be 100ohms to make a balanced filter instead of just 1 line?

Thank you!

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Updated snubber components
[edited by: Poley at 11:09 AM (GMT -4) on 8 Oct 2025]
  • Based on a quick look, I only see one serious item:

    the 100k pulldown resistor on the common source rail may overload the LTC7000 charge pump. The IC has internal circuitry to guarantee gate pulldown throughout all normal situations, and shouldn't be necessary.

    If you check the IC datasheet, the internal charge pump can only source a few tens of uA. 30V / 100k = 300uA (using 30V just as an example gate voltage).

    See datasheet typical operating curves: