Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good design practices, such as keeping the battery connections short and wide, using a solid ground plane, and minimizing noise coupling. Additionally, TI offers a reference design (TIDA-010036) that can be used as a starting point.
The BQ20Z90DBTR-V110G4 has a built-in calibration mechanism. During the manufacturing process, the device is calibrated to the specific battery chemistry. However, it's recommended to perform a calibration cycle during production to ensure accurate fuel gauging. The calibration process involves charging and discharging the battery while monitoring the device's output.
The BQ20Z90DBTR-V110G4 has an accuracy of ±1% for the state of charge (SOC) and ±5% for the remaining capacity (RC). The device uses a proprietary algorithm to compensate for battery aging, which helps maintain accuracy over time. However, it's essential to perform periodic calibration to ensure the device remains accurate.
The BQ20Z90DBTR-V110G4 is optimized for lithium-ion (Li-ion) batteries, but it can be used with other chemistries, such as lithium-polymer (Li-poly) and lithium-iron-phosphate (LiFePO4). However, the device's accuracy may vary depending on the specific chemistry and characteristics of the battery. It's recommended to consult with TI's application engineers for guidance on using the device with non-Li-ion batteries.
The BQ20Z90DBTR-V110G4 has a POR and BOR feature to ensure the device resets properly during power-up and brown-out conditions. It's essential to follow the recommended power-up sequence and ensure the device has a stable power supply to prevent unwanted resets. Additionally, the device's reset pins can be used to implement a custom reset strategy.
BQ20Z90DBTR-V110G4 datasheet
by Texas Instruments
