BQ21040DBVR

The BQ21040DBVR is a highly integrated battery management IC from Texas Instruments, designed specifically for lithium-ion and lithium-polymer battery charging applications. This device is particularly suited for portable electronics, such as smartphones, tablets, and other battery-operated devices.

Key Features:

1. Charging Functionality: The BQ21040 supports a linear battery charger with a constant current/constant voltage (CC/CV) charging algorithm. This ensures efficient charging while protecting the battery from overcharging.

2. Input Voltage Range: It operates with a wide input voltage range, typically from 4.5V to 14V, allowing it to be powered from various sources, including USB and wall adapters.

3. Charge Current: The device can be configured to provide a maximum charge current of up to 1A, making it suitable for fast charging applications.

4. Thermal Regulation: The BQ21040 includes thermal regulation features that help prevent overheating during the charging process. It adjusts the charge current based on the temperature of the device, ensuring safe operation.

5. Battery Protection: It incorporates several safety features, including overvoltage protection, undervoltage lockout, and short-circuit protection, which help to safeguard both the battery and the device.

6. Status Indicators: The IC provides status output pins that can be used to indicate the charging status (charging, done, or fault), allowing for easy integration with user interfaces.

7. Small Package Size: The BQ21040 is available in a compact 6-pin SOT-23 package, making it ideal for space-constrained applications.

8. Low Quiescent Current: The device features low quiescent current consumption, which is beneficial for battery life, especially in standby modes.

Applications:

• Portable Consumer Electronics: Ideal for smartphones, tablets, and wearable devices.
• Battery-Powered Tools: Suitable for various handheld tools and devices requiring efficient battery management.
• IoT Devices: Can be used in Internet of Things (IoT) applications where battery efficiency is critical.

Conclusion:

The BQ21040DBVR from Texas Instruments is a versatile and efficient battery management solution that combines safety, performance, and compact design. Its features make it an excellent choice for designers looking to implement reliable battery charging in portable electronic devices.