What this Li-Ion protector does in the pack
The BQ24314CDSGT is a single-chip battery protection IC for Lithium Ion chemistries, monitoring cell voltage and pack current to guard against overcharge, deep discharge, and short-circuit events. It integrates overcurrent, overtemperature, and over/under voltage fault protection into an 8-WSON (2x2) package — no external comparator or reference needed.
Fault coverage and what each trip protects
Overcurrent protection catches load-side shorts before the cell sees sustained high current; overtemperature protection shuts down the FET if the pack ambient exceeds the die limit; over/under voltage protection keeps each series cell inside its safe window. Together they cover the three failure modes that turn a Li-Ion pack into a fire risk. The 8-WFDFN Exposed Pad package lets the die sink heat into the PCB copper — critical because the overtemperature trip relies on the junction temperature, not the ambient air.