DESCRIPTION

· The bq2417x is a highly integrated standalone Li-Ion and Li-Polymer switched-mode battery charger with integrated N-channel power MOSFETs.

· It features a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current, and voltage.

· The device monitors battery pack temperature to allow charging only within a preset temperature window.

· The bq24170 charges one, two, or three cells, while the bq24172 is adjustable for up to three series Li+ cells.

FEATURES

· ±4% Input Current Regulation.

· 1.6-MHz Synchronous Switched-Mode Charger with 4-A Integrated N-MOSFETs.

· Up to 94% Efficiency.

· 30-V Input Rating with Adjustable Overvoltage Protection.

· Integrated 20-V Switching MOSFETs and Bootstrap Diode.

· Thermal Regulation Loop and Thermal Shutdown for safety.

APPLICATIONS

· Tablet PCs.

· Portable Data Capture Terminals.

· Portable Printers.

· Medical Diagnostics Equipment.

· Battery Bay Chargers.

· Battery Backup Systems.