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BQ76920: CHG/DSG relays

Scott Nelson
Intellectual 340 points
Part Number: BQ76920

Can the FET drivers for CHG and DSG be used instead to switch mechanical relays?  Should I include some sort of current-limiting resistors?

Thanks!

-Scott

  • 0
    TI__Guru 54715 points
    Hi Scott,
    The CHG and DSG outputs are intended for low current as is typically shown by the FET gate and large resistor. Short circuit current for the outputs is about 2 mA. Relays are unusual with a battery due to the current requirements, but could be used. A separate relay driver may be desired. Check the response time for a short circuit event since relays are sometimes considered slow.