Hi,
Using the BQ25723 in schematic phase for a battery bank, so I have control of design of protection and cell balancing.
Trying to figure out if the battery over-current protection on BQ25723 will be enough to protect the battery for over-current events without adding a separate shunt resistor in the battery path.
from the datasheet:
9.3.22.6 Battery Discharge Overcurrent Protection (BATOC) The charger monitors the battery discharge current to provide the battery overcurrent protection (BATOC) through voltage across SRN and SRP. BATOC can be enabled by configuring EN_BATOC=1b. BATOC threshold is selected either 133% of IDCHG_TH2 or 200% IDCHG_TH2 through BATOC_VTH bit. The threshold is also clamped between 100 mV and 360 mV SRN-SRP cross voltage. When discharge current is higher than the threshold after 250-μs deglitch time, BATOC fault is triggered, status bit Fault BATOC is set accordingly. Converter shuts down when BATOC is asserted to disable OTG operation and reduce discharge current. BATFET status is not impacted if need to supplement power to system. BATOC is not a latch fault, therefore after BATOC fault is removed, with 250-ms relax time, converter resume switching automatically. But status bit Fault BATOC is only cleared by host read
When the BATOC fault triggers under operation, let's say during discharge and with no external power supplied, I wonder if the battery pfet will be turned off under this event.
Any comments welcome, thanks.
