Texas Instruments bq25628E I2C Controlled Buck Battery Charger

Texas Instruments bq25628E I²C Controlled Buck Battery Charger is a highly integrated 2A switch-mode battery charge management and system power path management device for single-cell Li-ion and Li-polymer batteries. The solution includes built-in current sensing, loop compensation, and input reverse-blocking FET (RBFET, Q1). It also contains high-side switching FET (HSFET, Q2), low-side switching FET (LSFET, Q3), and battery FET (BATFET, Q4) between the system and battery. The device uses narrow VDC power path management, regulating the system slightly above the battery voltage without dropping below a configurable minimum system voltage. The low impedance power path optimizes switch-mode operation efficiency, reduces battery charging time, extends battery life during the discharging phase, and the ultra-low 0.15µA ship mode current extends battery shelf life. The I²C serial interface with charging and system settings makes the bq25628E a truly flexible solution. The Texas Instruments bq25628E is available in an 18-pin, 2.5mm × 3.0mm WQFN package.