It monitors for hazardous conditions such as overcurrent in discharge, short-circuits, and cell overvoltage. If a critical failure is detected, it can blow a permanent thermal fuse (like the D6SA3-12) to disable the pack for safety. Fuel Gauging: By using a high-resolution 16-bit integrator for Coulomb Counting
Unlike the BQ27500 series (which uses a simple ROM), the bq40370 is a device. When you buy a blank bq40370 from Mouser or Digi-Key, it does nothing. It is a brick. You must program it with a "Golden Image" – a specific .srec or .bq.fs file that contains: bq40370