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Original question:

BQ27750EVM-837: integrate into application for monitoring

BQ27750EVM-837: Discharge/Charge problem with bq27gdk000evm

Wenlong Wang
Intellectual 275 points
Part Number: BQ27750EVM-837
Other Parts Discussed in Thread: BQSTUDIO

Hi Ti team,

I am using bq27750EVM-837 to monitor my battery behavior. I also use bq27gdk000evm to speed up building my experiment.

I meet a problem that after I setup the hardware connection and set all the parameters I need to gauge data memory, I am not able to start the discharging procedure from bqstudio by clicking start button under GDK tab. It gives me an error message. I am sure I have enable the FET.

Could you give some advise?

I attach the screenshots of register contents, discharge information and error message. If more information is needed, just let me know.

Kindly regards,

Wenlong

  • 0
    TI__Guru* 76230 points
    Hi Wenlong,
    Can you press the black reset buttons for the two uC on the board? Cycle power to the board as well and use a different discharge rate so we see if that helps.

    thanks
    Onyx
  • 0 in reply to Onyx Ahiakwo
    Intellectual 275 points

    Thank you for your reply, Onyx.

    Following your advise, I press the black reset buttons for the two uC on the board and cycle power to the board. After ensuring both GDK and the gauge are already turned on, I try to discharge the battery by 100mA, 500mA, 1000mA, 1500mA and 1900mA constant current. All of them fail with the same error message as seen pictorially:

    To provide more information, the voltage between TP1 (1P) and TP5 (1N) is 4129 mV. I measure the voltage between TP2 (Charger+/Load+) and TP6 (Charger-/Load-) as well:

    - During both charge and discharge FET are on, the voltage is around 593 mV;

    - During both FETs are off, the voltage is around 502 mV.

    I don't know if this information is useful to solve my current problem. If any other information you want to know, just tell me.

    Thank you,

    Wenlong

  • 0 in reply to Wenlong Wang
    TI__Guru* 76230 points
    Hi Wenlong,
    We will have to take this offline.

    thanks
    Onyx