BQ24170RGYT Datasheet PDF - TI

The BQ24170RGYT is a synchronous switch-mode Li-ion and Li-polymer stand-alone Battery Charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. The bq24170 charges one, two, or three cells (selected by CELL pin). The device charges the battery in three phases: preconditioning, constant current and constant voltage. Charge is terminated when the current reaches 10% of the fast charge rate. A programmable charge timer offers a safety backup. It automatically restarts the charge cycle if the battery voltage falls below an internal threshold and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage.

● Automatic power path selector between adapter and battery

● Dynamic power management

● Integrated 20V switching MOSFETs

● Integrated bootstrap diode

● Internal digital soft start

● Thermal shutdown

● Adjustable input overvoltage protection

● Cycle-by-cycle current limit

● Green product and no Sb/Br

●Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.