BQ24721 PDF – Switch-Mode Charger IC

The BQ24721 is a battery charger and system power selector IC (integrated circuit) manufactured by Texas Instruments. It is commonly used in various portable electronic devices, such as laptops and tablets, to manage the charging of the battery and the power distribution within the system.

Part Number: BQ24721

Function: Adv Multi-Chemistry Mutli-Cell Sync Switch-Mode Charger Syst Power Selector (Rev. F)

Package : VQFN 32 Pin Type

Manufacturer: Texas Instruments ( )


1 pageBQ24721 pinout


This IC allows for the selection and prioritization of power sources, such as AC adapters or external power supplies. It can handle power path management, enabling the system to power the load directly from the adapter or from the battery, depending on the available power source.

The bq24721 is a high efficiency synchronous battery pack charger with high level of integration for portable applications. This device implements a high performance analog front-end that interfaces to the system power management micro-controller through a simplified SBS-like SMBus interface.

The dynamic power management (DPM) function modifies the charge current depending on system load conditions, avoiding ac adapter overload.

High accuracy current sense amplifiers enable accurate measurement of either the charge current or the ac adapter current, allowing termination of nonsmart packs and monitoring of overall system power.

The adapter isolation diode can be bypassed or entirely replaced with an external MOSFET using a control signal provided by the bq24721, thus reducing overall power dissipation.


BQ24721 pdf charger


1. 6-V Drive Supply Voltage for Increased Efficiency
2. Reverse Battery to Adapter Discharge Protection
3. Battery/Adapter to System Power Selector Function
4. Charge and Adapter Overcurrent Protection
5. Battery Thermistor Sense, TS, Comparators

BQ24721 PDF Datasheet