Other Parts Discussed in Thread: BQSTUDIO
Is the bq35100 device pre-calibrated? ie: is it calbrated by TI prior to the customer receiving it?
We just need to use the device in ACC mode. So if the calibration can be skipped, that is good to know. The documentation in the datasheet leads me to believe this is so, but I'm not certain:
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:
1. Provide power to the device via a supply to the BAT pin that is above VREGIN, 2.7 V.
2. Power up the device by pulling the GE pin to a supply above VIH(GE), 2.65 V.
3. 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.
4. 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.
5. 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.
