BQ27421-G1: hibernate mode

yes it will.
if you cut off power you will need to have non volatile memory where you store data memory contents with your configuration so you can load it back on the gauge.

thanks
Onyx

You will loose passed charge data when you wake from shut down. the gauge will estimate SOC based on OCV measurement. This could be prone to errors if there is a current flow into or out of the gauge. So yes this will affect accuracy. However, Once you charge the device to full or discharge to empty which are reference points, the device will resume good accuracy.

thanks
Onyx

Hi Toshiro
In hibernate, the gauge is pretty much non-fucntional. It is not coulomb counting. When it wakes up from hibernate, it takes an OCV measurement, performs a remcap simulation and estimates SOC. This estimation will have errors if you have current flow. We cannot determine how much error will exit as this is dependent on the amount of current. So if you continuously put the gauge in hibernate each time you wake, you will be prone to error until the device is charged to full or discharged to empty before good accuracy is restored. I hope this helps.


thanks
Onyx