Product Description

• The bq24745 is a high-efficiency, synchronous battery charger with an integrated input-current comparator, offering low component count for space-constrained, multi-chemistry battery charging applications. SMBus input-current, charge-current, and charge-voltage DACs allow very high regulation accuracies that can be easily programmed by the system power-management microcontroller using the SMBus.
• The bq24745 charges two, three, or four  series Li+ cells, and is available in a 28-pin, 5×5 mm2 thin QFN package.

FEATURES:

• NMOS-NMOS Synchronous Buck Converter with 300kHz Frequency and >95% Efficiency.
• 30-ns Minimum Driver Dead-time and 99.5% Maximum Effective Duty Cycle.
• Up to 19.2V Battery Voltage.
• 6V–24V AC/DC-Adapter Operating Range.

APPLICATIONS:

• Notebook and Ultra-Mobile Computers.
• Portable Data-Capture Terminals.
• Portable Printers.
• Medical Diagnostics Equipment.
• Battery Bay Chargers.
• Battery Back-up Systems.