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BQ40Z80: BQ40Z80

Kalpesh JADHAV
Prodigy 50 points
Part Number: BQ40Z80

Tool/software:

Hi Ti,

im working on the BMS with BQ40Z80 IC and now able to read data over I2C only.
but im stuck in toggling of DSG FET and CHG FET over I2C.
how to implement this toggles? and is there series of steps to toggle these?

im able to toggle gauge and FET over I2C. just guide me in the right direction for this

kalpesh

  • 0
    TI__Mastermind 37761 points

    Hello,

    The toggle commands for DSG and CHG FETs will only work if FET_EN is set to 0. Please ensure FET_EN is set to 0.

    If so, then make sure you are sending the command in little endian format: 

    Regards,

    Adrian

  • 0 in reply to Adrian
    Prodigy 50 points

    im trying to change status of DSG  FET when FET_EN is set to 0. but its toggling on but its value is not reflected in 0x0057 or 0x0054 registers where we can check is the values are being updated or not 
    is there any register other than this where it reflects the status of DSG FET

  • 0 in reply to Kalpesh JADHAV
    TI__Mastermind 37761 points

    Hello Kalpesh,

    Nope, the Operation Status A register is the one to look at to know the status of the FETs. Do you have any protections or PF that are currently tripped? If so, then you will not be able to turn on the corresponding FETs.

    Regards,

    Adrian