Texas Instruments recommends a compact layout with the IC placed close to the battery, and the sense resistors (Rsns) placed close to the IC. The layout should also minimize the distance between the IC and the battery, and ensure that the sense lines are not routed near noise sources.
Calibration involves adjusting the gain and offset of the fuel gauge to match the specific battery characteristics. This can be done by measuring the battery voltage and current during charging and discharging, and then adjusting the gain and offset registers accordingly. TI provides a calibration guide and software tools to assist with this process.
Temperature affects the battery's characteristics, which in turn affect the fuel gauge's accuracy. The BQ2057CDGK has a built-in temperature sensor, and TI recommends using this data to compensate for temperature effects. Additionally, the device has a temperature coefficient correction feature to further improve accuracy.
The POR and BOR features ensure the device resets properly during power-up and brown-out conditions. To handle these features, ensure that the power supply is stable and within the recommended operating range, and that the device is properly configured for the specific application requirements.
The BQ2057CDGK uses an I2C interface for communication. TI recommends using a dedicated I2C bus for communication, and following the I2C protocol specifications to ensure reliable data transfer.
BQ2057CDGK datasheet
by Texas Instruments
