The bq25100B device 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 low-cost unregulated adapters.
The 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. In all charge phases, an internal control loop monitors the IC junction temperature and
reduces the charge current if an internal temperature threshold is exceeded.
The charger power stage and charge current sense functions are fully integrated. The
charger function has high accuracy current and voltage regulation loops and charge termination. The
pre-charge current and termination current threshold are programmed via an external resistor on the
bq25100B. The fast charge current value is also programmable via an external resistor.
References to other devices in the bq25100B family are included in this document. For
more information on those devices, please see their respective datasheets. This includes references
to the CHG pin and the JEITA temperature functionality.
View datasheet View product folder