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  • BQ28Z620: Question about BQ28Z620

    TI Thinks Resolved
    Part Number: BQ28Z620 Tool/software: Hello： Project situation: Customer battery level meter project Question: How does the built-in HMAC-SHA1 algorithm of the BQ28Z620 electricity meter match with the HMAC-SHA1 algorithm on the website? Description…

  • BQ28Z620: Question about BQ28Z620

    Part Number: BQ28Z620 Other Parts Discussed in Thread: BQSTUDIO Tool/software: Hello: Problem phenomenon: Battery level display shows a question mark during low battery and high temperature hang testing Problem description: When the machine is charged…
    • Answered

  • BQ28Z620: I2C communication issues with BQ28Z620

    Resolved
    Part Number: BQ28Z620 Tool/software: Hello, engineers at TI, When we are testing the I2C communication waveform, we found that the low-level voltage is 0.5V, which is higher than the 0.42V specified in the datasheet. Will this affect the communication…
    • Resolved

  • BQ28Z620: Issue of inconsistent SOC during low current discharge of BQ28Z620

    TI Thinks Resolved
    Part Number: BQ28Z620 Other Parts Discussed in Thread: BQSTUDIO Tool/software: Dear When discharging the battery with low current using BQ28Z620 chip, there is a significant voltage difference corresponding to SOC. Please help analyze the reasons for…

  • BQ28Z620: Chemistry ID for BQ28Z620 – 2S2P 21700 LiNiCoAlO₂ Cells

    TI Thinks Resolved
    Part Number: BQ28Z620 Tool/software: Hello, I'm working with the BQ28Z620 and need to program a chemistry ID for a 2S2P pack of 21700 cells. The cell chemistry is LiNiCoAlO₂ (NCA) . The application does not require extremely high accuracy, so if there…
    • Answered

  • BQ28Z620: BQ28Z620 not updating status 04->05 during learning cycle

    Resolved
    Part Number: BQ28Z620 Other Parts Discussed in Thread: GPCCHEM Tool/software: Hi Ti team, Could you, please, support me with the battery lerning cycle for BQ28Z620. I have a conguguration 2S1P with cell ICR18650 2.2Ah 3.7V. The chemical ID was identify…
    • Resolved

  • BQ28Z620-DEVICE-FW: BQ28Z620 cannot enter ROM Mode

    TI Thinks Resolved
    Part Number: BQ28Z620-DEVICE-FW Other Parts Discussed in Thread: BQ28Z620 Tool/software: Dear Texas, I have designed custom PCB with BQ28Z620 fuel gauge base on Datasheet and EVM. I wanted to write golden file to its flash. I have tried to execute it…

  • BQ28Z620: BQ28Z620 Design Capacity and SoC Measurement Issue – FCC Fluctuation and Cycle Count Not Updating

    TI Thinks Resolved
    Part Number: BQ28Z620 Other Parts Discussed in Thread: BQSTUDIO , GPCCHEM , GPCRB Tool/software: Hello, I have designed a 1S4P battery pack using the BQ28Z620 IC. The minimum capacity of the battery in the design is 10800 mAh. However, even though I…
    • Answered

  • BQ28Z620: SS flag logic

    Resolved
    Part Number: BQ28Z620 Tool/software: Hi. The MACSubcmd() 0x0054 OperationStatus returns flag SS, called "Safety mode status": However, there is no explanation in the TRM of how exactly this bit is activated or deactivated. Our team suggests that…
    • Resolved

  • BQ28Z620: Returned temperature value

    TI Thinks Resolved
    Part Number: BQ28Z620 Tool/software: Hi teams, May I ask if the temperature returned by this register is instantaneous or average? What is the range of error values? Best Regards！ Iris

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