Overview
The BQ29209DRBR is a lithium-ion battery protection IC manufactured by Texas Instruments (TI). Designed for use in 2-cell series battery packs, this component offers secondary overvoltage protection and automatic cell balancing. It is particularly suited for applications in portable devices, laptops, power tools, and backup battery systems. The BQ29209DRBR is housed in a compact SON-8 package, making it ideal for space-constrained designs. Its key features include high-precision overvoltage detection, low power consumption, and automatic cell imbalance correction, making it a competitive choice for battery management solutions.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Brand | Texas Instruments | - | - |
| Model | BQ29209DRBR | - | - |
| Package | SON-8 | - | - |
| Function | Secondary Overvoltage Protection | - | For 2-cell Li-ion battery packs |
| Overvoltage Protection Threshold | 4.30V, 4.35V | V | Fixed |
| Cell Balancing Current | Up to 15 mA | mA | Internal |
| Power Consumption | < 3 µA | µA | Typical |
| Operating Temperature | 0°C to 60°C | °C | - |
Key Features
- High-precision overvoltage detection (±25mV accuracy).
- Automatic cell imbalance correction with ±30mV enable threshold.
- Low power consumption (< 3 µA typical).
- Internal cell balancing capability up to 15 mA.
- Compact SON-8 package for space-constrained designs.
Applications
The BQ29209DRBR is widely used in various applications, including:
- Portable Devices: Ensures safe and efficient battery management in smartphones, tablets, and wearables.
- Laptops: Provides secondary protection for battery packs, enhancing safety and longevity.
- Power Tools: Protects against overvoltage and balances cells in high-drain applications.
- Backup Battery Systems: Maintains battery health in uninterruptible power supplies (UPS) and other backup systems.
Q & A
1. What is the primary function of the BQ29209DRBR?
The BQ29209DRBR provides secondary overvoltage protection and automatic cell balancing for 2-cell lithium-ion battery packs.
2. What is the overvoltage protection threshold?
The overvoltage protection thresholds are fixed at 4.30V and 4.35V.
3. How does the cell balancing feature work?
The cell balancing feature automatically corrects voltage imbalances between cells when the difference exceeds ±30mV.
4. What is the typical power consumption of the BQ29209DRBR?
The typical power consumption is less than 3 µA.
5. What is the maximum cell balancing current?
The maximum internal cell balancing current is 15 mA.
6. What is the operating temperature range?
The operating temperature range is 0°C to 60°C.
7. What package does the BQ29209DRBR come in?
It is housed in a compact SON-8 package.
8. Is the BQ29209DRBR suitable for portable devices?
Yes, it is ideal for portable devices due to its low power consumption and compact size.
9. Can it be used in power tools?
Yes, it is suitable for power tools, providing overvoltage protection and cell balancing.
10. Does it support external cell balancing?
Yes, the BQ29209DRBR supports external cell balancing through the CB_EN pin.
