BQ24070

The BQ24070 and BQ24071 are highly integrated Li-ion linear chargers and system power-path management devices from Texas Instruments, targeted at space-limited portable applications. These devices offer DC supply (AC adapter) power-path management with autonomous power-source selection, power FETs, and current sensors. They provide high-accuracy current and voltage regulation, charge status, and charge termination in a single monolithic device.

The bq2407x devices power the system while independently charging the battery. This feature reduces charge and discharge cycles on the battery, allows for proper charge termination, and enables the system to run with an absent or defective battery pack. It also allows the system to instantaneously turn on from an external power source in the case of a deeply discharged battery pack. The IC design focuses on supplying continuous power to the system when available from AC adapter or battery sources.

Key features include a small 3.5-mm × 4.5-mm VQFN package, integrated Dynamic Power-Path Management (DPPM), power supplement mode, autonomous power source selection, and support for up to 2 A total current. It also includes thermal regulation for charge control, charge status outputs for LED or system interface, and reverse current, short-circuit, and thermal protection. The system output regulation voltage options are 4.4-V and 6-V.