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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fbq25176m”>View Datasheet
Texas Instruments bq25176M 800mA Linear Battery Charger is an integrated linear solar charger for 1-cell Li-Ion, LiFePO4, and Li-Polymer batteries with continual charge mode and battery tracking VINDPM. The device has a single power output that charges the battery. When the system load is placed in parallel with the battery, the charge current is shared between the battery and the system. The device has four phases for charging a Li-Ion/Li-Poly battery. Trickle charge is used to bring the battery voltage up to VBAT_SHORT. Precharge is used to recover a fully discharged battery. Fast-charge constant current is used to supply the bulk of the charge and voltage regulation to reach full capacity.
In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, TREG, is exceeded. The Texas Instruments bq25176M charge current sense and power stage functions are fully integrated. The charger function has high-accuracy current and voltage regulation loops, automatic charge termination, and a charge status display. The fast charge current and charge voltage are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.
