bq25100B Single-Cell Li-Ion Battery Charger

Texas Instruments bq25100B Single-Cell Li-Ion Battery Charger is a highly integrated Li-Ion and Li-Pol linear charger targeted at space-limited portable applications. The high input voltage range with input overvoltage protection supports unregulated adapters. The Texas Instruments bq25100B has a single power output that charges the battery. A system load can be placed in parallel with the battery as long as the average system load does not keep the battery from charging fully during the 10-hour safety timer. The battery is charged in three phases: conditioning, constant current, and constant voltage. An internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold is exceeded in all charge phases. Ideal applications include fitness accessories, smartwatches, and more.