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bq24725A Datasheet 1-4 Cell Li+ Battery Smbus Charge Controller

Manufacturer: Texas Instruments

Overview: Product Folder Order Now Technical Documents Tools & Software Support & munity BQ24725A SLUSAL0C – SEPTEMBER 2011 – REVISED JANUARY 2020 BQ24725A SMBus 1- to 4-Cell Li+ Buck Battery Charge Controller with N-Channel.

General Description

The BQ24725A is a high-efficiency, synchronous battery charger, offering low ponent count for space-constraint, multi-chemistry battery charging applications.

The BQ24725A utilizes two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.

SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.

Key Features

  • 1 SMBus Host-controlled NMOS-NMOS synchronous buck converter with programmable 615kHz, 750kHz, and 885kHz switching frequencies.
  • Automatic N-channel MOSFET selection of system power source from adapter or battery driven by internal charge pumps.
  • Enhanced safety features for over voltage protection, over current protection, battery, inductor and MOSFET short circuit protection.
  • Programmable input current, charge voltage, charge current limits.
  • ±0.5% Ch.

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