Part Number : BQ24170RGYR
Function : 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger / Up to 94% Efficiency
Package : VQFN 24 Pin Type
Maker : Texas Instruments
Pinouts : 
Description :
The BQ24170RGYR, bq24170/bq24172 is highly integrated stand-alone Li-ion and Li-polymer switch-mode battery charger with two integrated N-channel power MOSFETs. It offers a constant-frequency synchronous PWM controller with high accuracy regulation of input current, charge current, and voltage. It closely monitors the battery pack temperature to allow charge only in a preset temperature window. It also provides battery detection, pre-conditioning, charge termination, and charge status monitoring. The thermal regulation loop reduces charge current to maintain the junction temperature of 120°C during operation.
The bq24170/bq24172 charges the battery in three phases: precondictioning, constant current, and constant voltage. The bq24170 charges one, two, or three cells (selected by CELL pin), and the bq24172 is adjustable for up to three series Li+ cells.
Official Homepage : https://www.ti.com/product/BQ24170
Datasheet PDF Download : 
Others datasheet of same file :
BQ24170, BQ24170R, BQ24170RGYT, BQ24172, BQ24172RGYR