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BQ28Z610: Protection FET drive voltage

Part Number: BQ28Z610

I am working on a 1s design and have it configures in the BMS, the FETS are enabled and shown active but I do not have the expected 8-9v gate drive voltage on CHG and DSG pins. I am seeing between 1-2v on these and am not getting FETs to turn on. Do you see anything wrong with this schematic implementation? 

Thanks

  • Hi Steve

    There are a few things wrong with your schematic.

    The chip is supposed to be referenced to ground at bat- and not on pack-. Pls look closes at the evm user guide reference schematic.

    R32 is supposed to be 10ohms

    thnaks

    Onyx