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http://www.ti.com/general/docs/suppproductinfo.tsp?distId=26&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fbq25175″>View Datasheet
Texas Instruments BQ25175 Standalone 1-Cell 800mA Linear Battery Charger has an integrated design ideal for 1-cell Li-Ion and Li-Poly batteries. The BQ25175 offers a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.
The TI BQ25175 Standalone 1-Cell 800mA Linear Battery Charger supports three phases for charging a Li-Ion/LiPoly battery, including a precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity. An internal control loop monitors the IC junction temperature and reduces the charge current in all charge phases if an internal temperature threshold, TREG, is exceeded.
The fully integrated charger power stage and charge current sense functions are provided on the BQ25175. The charger function has high accuracy current and voltage regulation loops, charge status display, and automatic charge termination. The fast charge current is programmable through an external resistor. The precharge and termination current thresholds also track the fast charge current setting.
