Overview
The BQ7721609PWR is a highly integrated battery protection and monitoring IC designed by Texas Instruments for use in lithium-ion and lithium-polymer battery packs. This device is optimized for high reliability and efficiency, ensuring safe operation in various energy storage applications. It supports up to 16 series-connected cells, making it ideal for high-capacity battery systems. The BQ7721609PWR provides comprehensive protection against overvoltage, undervoltage, overcurrent, and temperature faults, thereby ensuring the safety and longevity of battery packs.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | 24-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| Number of Cells Supported | 3 to 16 series-connected cells |
| Overvoltage Protection | Adjustable: 3.55 V to 5.1 V |
| Undervoltage Protection | Adjustable: 1.0 V to 3.5 V |
| Overcurrent Protection | Programmable thresholds |
| Thermal Protection | Adjustable temperature trip points with external NTC thermistor |
| Communication Interfaces | I2C, SPI |
| Operating Temperature Range | -40°C to 110°C |
| Quiescent Current | Approximately 1 µA (V CELL(ALL) < V OV) |
Key Features
- Cell monitoring for up to 16 series-connected lithium-ion/lithium-polymer cells
- Integrated passive cell balancing capability
- High precision voltage measurement
- Overvoltage protection: adjustable thresholds
- Undervoltage protection: adjustable thresholds
- Overcurrent protection: programmable thresholds
- Thermal protection with adjustable temperature trip points
- Built-in GPIO for status indication
- Low quiescent current for extended battery life
- Flexible communication interface options (I2C/SPI)
Applications
- Electric vehicles
- Energy storage systems
- Portable electronic devices
- Power tools
- Uninterruptible power supplies (UPS)
- Renevable energy applications
- Consumer electronics
Q & A
- What is the maximum number of cells supported by the BQ7721609PWR?
The BQ7721609PWR can support up to 16 series-connected lithium-ion or lithium-polymer cells. - Can the overvoltage and undervoltage thresholds be adjusted?
Yes, the overvoltage and undervoltage protection thresholds are adjustable according to system requirements. - How does the passive cell balancing feature work?
The passive cell balancing feature ensures that excess charge is redirected from higher voltage cells to lower voltage ones, promoting uniform charge levels across the pack. - What communication interfaces are available with this IC?
The BQ7721609PWR supports communication over I2C and SPI, allowing for flexible integration with various microcontrollers and monitoring systems. - What are the typical applications for the BQ7721609PWR?
This IC is commonly used in electric vehicles, energy storage systems, portable electronics, and power tools, among others. - What is the operating temperature range of the BQ7721609PWR?
The operating temperature range is -40°C to 110°C. - How does the thermal protection work?
The thermal protection works with the addition of an external NTC thermistor to detect overtemperature conditions. - What is the quiescent current of the BQ7721609PWR?
The quiescent current is approximately 1 µA (V CELL(ALL) < V OV). - Does the BQ7721609PWR support open-wire detection?
Yes, the BQ7721609PWR supports open-wire connection detection. - What package type does the BQ7721609PWR use?
The BQ7721609PWR uses a 24-TSSOP package.
