Hi all,
I'm trying to figure out the best way to configure the bq27421-G1 for the lowest power option.
In my design the supply voltage (Battery) is always connected. The device is in one of two two modes:
1. On - all system power rails enables and device operating as expected. In this mode the bq27421-G1 is fully used.
or
2. Off - all system power rails disabled. The device effectively off but there are low power parts (<50uA total) "sniffing" for an external enable. The external enable is magnetic. In this mode the bq27421-G1 is not used at all.
I can't seem to figure out how to configure the bq27421-G1 for the Off mode to ensure its current draw is minimal. The solution has to be a hardware configuration because there's never a guarantee that the host will be present to force the bq27421-G1 into shutdown.
Can anyone guide me on this or point me to a spot in the documentation that discusses this?
Thanks,
Phillip