8.2.2.1 Preparation for Gauging
Before it is ready to gauge a lithium primary battery, a BQ35100 device-based circuit requires several steps, as follows:
- Provide power to the device via a supply to the BAT pin that is above VREGIN, 2.7 V.
- Power up the device by pulling the GE pin to a supply above VIH(GE), 2.65 V.
- Use BQStudio to calibrate the device. The device is calibrated when in ACC Mode (GMSEL = 0x0), which is also the state the device is shipped from TI. The BQ35100 EVM User Guide details the BQStudio software and Calibration Tab operation.
- Use BQStudio to update the CHEM ID. The Chemistry Tab enables the selection and programming of the appropriate CHEM ID for the cell being used.
- Reset the device once the calibration and CHEM ID programming are complete. To do this, toggle the GE pin Low and then back High or via the Reset command in BQStudio.
With these steps complete the next phase of configuration and use is determined by which Gauging Mode is intended to be used.