BQ25A – Battery SMBus Charge Controller – TI

Part number : BQ24725A, Marking : BQ25A

Functions : 1-4 Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector

Package information : 20-pin 3.5 × 3.5 mm2 VQFN Package information

Manufacturer : Texas Instruments



Functions :

The bq24725A is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.

The BQ25A 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.

The bq24725A uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.


Pinout :



1. SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with Programmable 615kHz, 750kHz, and 885kHz Switching Frequencies

2. Automatic N-channel MOSFET Selection of System Power Source from Adapter or Battery Driven by Internal Charge Pumps

3. Enhanced Safety


for Over Voltage Protection, Over Current Protection, Battery, Inductor and MOSFET Short Circuit Protection

Odering Information



Official Homepage :


BQ25A Datasheet PDF


This entry was posted in Uncategorized. Bookmark the permalink.