bq24725A

Product Folder Order Now Technical Documents Tools & Software Support & Community BQ24725A SLUSAL0C – SEPTEMBER 2011 – REVISED JANUARY 2020 BQ24725A SMBus 1- to 4-Cell Li+ Buck Battery Charge Controller with N-Channel Power MOSFET Selector 1 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% 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 LEARN 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 4.5V-24V 5µA Off-state battery discharge current 0.65mA (0.8mA max) Adapter standby quiescent current 20-pin 3.5 x 3.5 mm2 VQFN Package 2 Applications Portable notebook computers, UMPC, Ultra-thin notebook, and Netbook Handheld terminal Industrial and medical equipment Portable equipment 3 Description The BQ24725...