bq24725

www.ti.com bq24725 SLUS702A – JULY 2010 – REVISED NOVEMBER 2010 2-4 Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector and Advanced Circuit Protection Check for Samples: bq24725 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 Current or Charge Current Amplifier Output Accuracy Programmable Battery Depletion Threshold, and Battery LERAN Function Programmable Adapter Detection and Indicator Integrated Soft Start Integrated Loop Compensation Real Time System Control on ILIM pin to Limit Charge Current AC Adapter Operating Range 9V-24V 5µA Off-State Battery Discharge Current 20-pin 3.5 x 3.5 mm2 QFN Package APPLICATIONS Portable Notebook Computers, UMPC, UltraThin Notebook, and Netbook Personal Digital Assistant Handheld Terminal Industrial and Medical Equipment Portable Equipment ACDET IOUT SDA SCL ILIM DESCRIPTION The bq24725 is a high-efficiency, synchronous battery char...