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BQ27426: BQ27426 cannot be written to data under the condition of inserting adapter

Part Number: BQ27426

Tool/software:

Hi Team,

At present, we are using the BQ27426 gas gauge and have its I2C connected to the charging IC and several other chips on the same I2C line. When the adapter is plugged in for charging, the main chip cannot write data to the gas gauge through I2C.May I ask what the reason is?

Thank you 

Best Rgards

Ziwei Wu

  • Hello, 

    Please ensure that the I2C lines are pulled up to the correct voltage, and that the I2C address of the gauge is different from the addresses of the other devices on the bus. 

    Regards, 

    Robert.