Texas Instruments

BQ29209DRBT

The BQ29209DRBT is a highly integrated fuel gauge IC from Texas Instruments that provides accurate battery monitoring and protection for single-cell lithium-ion (Li-ion) and lithium-polymer (Li-poly) batteries. It is designed to meet the needs of a wide range of portable electronic devices, such as smartphones, tablets, wearables, and other battery-powered devices.

Description:

The BQ29209DRBT is a system-on-chip (SoC) solution that integrates a precision ADC, fuel gauge, and battery protection features into a single device. It uses a coulomb counting method to estimate the remaining battery capacity and provides accurate measurements of battery voltage, current, temperature, and state of charge (SoC).

Features:

1. Accurate battery monitoring: The BQ29209DRBT uses a coulomb counting method to estimate the remaining battery capacity with an accuracy of ±5%.
2. Battery protection: The device provides overcharge, over-discharge, over-current, and short-circuit protection to ensure the safety and longevity of the battery.
3. I2C and SMBus compatible: The BQ29209DRBT supports I2C and SMBus communication protocols, allowing for easy integration with microcontrollers and other system components.
4. Small form factor: The device is available in a compact 24-pin TSSOP package, making it suitable for space-constrained applications.
5. Low power consumption: The BQ29209DRBT operates with a low power consumption of 95µA in active mode and 2.5µA in standby mode, helping to extend the overall battery life of the device.
6. Temperature monitoring: The device can measure the temperature of the battery and provide over-temperature protection.
7. Programmable alerts: The BQ29209DRBT allows users to set custom alerts for various battery parameters, such as voltage, current, and SoC, through its I2C interface.

Applications:

1. Smartphones and tablets
2. Wearable devices (smartwatches, fitness trackers, etc.)
3. Portable media players
4. Bluetooth headsets and speakers
5. Mobile computing devices (laptops, netbooks, etc.)
6. Medical devices (portable monitoring equipment, etc.)
7. GPS devices and navigation systems
8. Portable gaming consoles
9. Wireless routers and access points
10. IoT devices and sensors

The BQ29209DRBT is a versatile and highly integrated solution for battery monitoring and protection in a wide range of portable electronic devices, providing accurate measurements and advanced features to ensure the safety and longevity of the battery.