Overview
The BQ294700DSGR, produced by Texas Instruments, is a sophisticated overvoltage monitor and protector designed for lithium-ion battery pack systems. This device is part of the BQ2947 family and is engineered to provide robust and reliable protection for 2-series to 4-series cell Li-Ion batteries. Each cell is monitored independently for overvoltage conditions, ensuring the safety and longevity of the battery system. The device features an external capacitor-programmed delay timer and factory-programmed overvoltage protection thresholds, making it highly versatile and efficient in various battery management applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of series cells | 2, 3, 4 | - |
| Overvoltage protection threshold range | 3.85 V to 4.6 V | V |
| Output options | Active high or open drain active low | - |
| Accuracy of overvoltage protection | ±10 mV | mV |
| Low power consumption (ICC) | ≈ 1 µA (VCELL(ALL) < VPROTECT) | µA |
| Leakage current per cell input | < 100 nA | nA |
| Operating temperature range | -40°C to 110°C | °C |
| Package type | 8-pin WSON (2.00 mm x 2.00 mm) | - |
Key Features
- 2-, 3-, and 4-series cell overvoltage protection
- External capacitor-programmed delay timer
- Factory-programmed OVP threshold (range 3.85 V to 4.6 V)
- Output options: active high or open drain active low
- High-accuracy overvoltage protection: ±10 mV
- Low power consumption (ICC ≈ 1 µA)
- Low leakage current per cell input (< 100 nA)
- Small package footprint (8-pin WSON, 2.00 mm x 2.00 mm)
- Customer Test Mode for quicker production-line testing with reduced delay time of 67
Applications
- Notebooks
- UPS battery backup systems
- Power tools
- Medical devices
- Industrial equipment
- Battery packs for consumer electronics
- Electric vehicles
- Renameable energy storage systems
Q & A
- What is the primary function of the BQ294700DSGR?
The primary function of the BQ294700DSGR is to provide overvoltage protection for 2-series to 4-series cell Li-Ion battery pack systems.
- What is the range of the overvoltage protection threshold for the BQ294700DSGR?
The overvoltage protection threshold range is from 3.85 V to 4.6 V.
- What are the output options for the BQ294700DSGR?
The output options are active high or open drain active low.
- How accurate is the overvoltage protection of the BQ294700DSGR?
The overvoltage protection accuracy is ±10 mV.
- What is the typical power consumption of the BQ294700DSGR?
The typical power consumption is approximately 1 µA when all cell voltages are below the protection threshold.
- What is the leakage current per cell input for the BQ294700DSGR?
The leakage current per cell input is less than 100 nA.
- What is the operating temperature range for the BQ294700DSGR?
The operating temperature range is -40°C to 110°C.
- What package type is the BQ294700DSGR available in?
The BQ294700DSGR is available in an 8-pin WSON package with a footprint of 2.00 mm x 2.00 mm.
- Does the BQ294700DSGR support any special test mode for production?
Yes, it supports a Customer Test Mode with a reduced delay time of 67 for quicker production-line testing.
- In what types of applications is the BQ294700DSGR commonly used?
The BQ294700DSGR is commonly used in notebooks, UPS battery backup systems, power tools, medical devices, industrial equipment, and various battery packs for consumer electronics and electric vehicles.
