BQ76942: Bypassing discharge fets while charging in a series fet configuration

Hi Tarun,

You can connect a system like the sketch above, there are a few situations to consider.

One would be that since you have the series FETs in the discharge path you likely want the series FET configuration setting so the body diode protection operates.  This is good for connection of discharge without the charger since the charge FET will turn on if needed to avoid overheating of the FET.  With the charger alone the operation of the discharge FET should be a don't care.  It gets interesting if both the charger and load can be connected at the same time.  If the charge current turns on the discharge path again because of the body diode protection function the load may be powered unexpectedly.  Be sure your system is suitable for the possible operating situations.

The diagram above does not have discharge protection on the charge path.  See the parallel path application note for some discussion of behaviors and circuit options which may be useful to consider if you need to protect against discharge from the charge path.  https://www.ti.com/lit/pdf/slua952 .  Many other circuit options are possible of course, design something suitable for your system.