BQ7692002PW

Overview

The BQ7692002PW is a battery monitor from the Texas Instruments BQ769x0 family, designed for 3 to 5 series cell lithium-ion and lithium-phosphate battery packs. It integrates high-precision analog front-end circuitry with an I2C-compatible digital interface for system communication. The device provides comprehensive monitoring of cell voltages, pack current, and temperature while supporting active cell balancing. It operates within a supply voltage range up to 25 V and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates high-accuracy analog front-end for multi-series cell voltage measurement
• Supports active cell balancing to maintain pack capacity and longevity
• Features I2C digital interface for configuration and data retrieval
• Provides hardware-based protection against over-voltage, under-voltage, and over-current conditions

Applications

• Portable medical devices requiring precise battery state monitoring
• Power tools utilizing multi-cell lithium-ion battery packs
• Uninterruptible power supplies (UPS) for small-scale electronics
• Electric bicycles and scooters with 3S to 5S battery configurations

Procurement Notes

Verify the specific suffix '02' in the part number BQ7692002PW to confirm it corresponds to the intended cell count configuration within the BQ76920 family. Ensure compatibility with the target PCB footprint, specifically the TSSOP-20 package dimensions. Confirm that the required operating temperature range aligns with the specified -40°C to +85°C industrial rating before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring integrated monitoring and protection for 3 to 5 series cells without external multiplexers. It is suitable for applications needing active balancing capabilities to improve battery efficiency. Consider the TSSOP-20 package constraints for space-limited designs. Ensure the host microcontroller supports the necessary I2C communication protocols for effective integration and control.

Part Context

This component belongs to the BQ769x0 family of battery monitors from Texas Instruments, which covers configurations for 3 to 15 series cells. The BQ76920 variant specifically targets lower cell counts compared to higher-numbered siblings like the BQ76930 or BQ76940. It shares architectural similarities with other members but differs in pinout and internal channel allocation optimized for smaller battery packs.

Replacement Considerations

Direct substitutes include other variants within the BQ76920 family such as BQ7692000PW or BQ7692003PW, provided the cell count requirements match. Cross-family replacements may require significant schematic and firmware modifications due to differences in interface and pin configurations.