BQ24071RHLR

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BQ24071RHLR is a battery management IC from Texas Instruments that integrates a Li-Ion/Li-Polymer battery charger and power-path management functions. Developed for major mobile devices, it has wide application fields and a simple working principle.

When used as a charger, BQ24071RHLR can detect the battery type and charge the battery with the proper profile. It allows manufacturers to design smartphones, tablets and other devices that use Li-Ion and Li-Polymer batteries with a selectable charge rate of 0.5 A, 1 A or 1.5 A. The charger is capable of simultaneous operation of the charge, charge termination algorithms and battery detection.

BQ24071RHLR is also utilized as part of a power-path management system, which supplies power from the USB port or the wall adapter to the system, the charger and the battery in parallel. This implementation gives 6V and up to 2A charging capability when connected to a 5V wall adapter. In addition, it controls the orientation of the charging current/voltage between VBUS and the system/battery, via a direct MOSFET current path.

Finally, BQ24071RHLR can be used to protect the device from sudden power surges from the input source. It includes a ultrafast ACPR circuit that monitors the set current levels in each direction and performs isolations of the input path when an over-current condition occurs.

The core of BQ24071RHLR working principle lies within an accurate analog circuit. The brick charger power stage uses an ultrafast ACPR circuit and a dedicated switch FET to directly control the battery charge current. In the power path, a MOSFET current path for both power and ground is directly switchable from the wall adapter to the system using software commands. Thus, the device reduces the number of external components and provides maximum design flexibility.

In a nutshell, BQ24071RHLR is a perfect solution for power-path management and charging of Li-Ion/Li-Polymer batteries. It is suitable for a wide range of applications, such as smartphones, tablets, navigation systems and more. The device simplifies the design process and can be easily implemented with few external components.

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