The bq2510x series of devices are highly integrated Li-Ion and Li-Pol linear chargers
targeted at space-limited portable applications. The high input voltage range with input
overvoltage protection supports low-cost unregulated adapters.
The bq2510x 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
bq2510x. The fast charge current value is also programmable via an external resistor.