BQ725 - Texas Instruments

BQ725 2-4 Cell Li+ Battery SMBus Charge Controller

The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications. The bq24725 uses 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 char.

Features

1
•2 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% Charge Voltage Accuracy up to 19.2V
  – ±3% Charge Current Accuracy up to 8.128A
  – ±3% Input Current Accuracy up to 8.064A
  – ±2% 20x Adapter C.