BQ27500DRZR

Battery Management Overview

The BQ27500DRZR is a System-Side Impedance Track™ Fuel Gauge designed for single-cell lithium-ion and lithium-polymer battery packs. It operates within a supply voltage range of 2.5 V to 4.5 V and supports battery capacities from 300 mAh to 8000 mAh. The device functions as a microcontroller peripheral, providing precise fuel gauge data including remaining capacity, state of charge, and run time. It utilizes a patented impedance tracking algorithm to model battery discharge curves and automatically adjust for aging and self-discharge. The component is housed in a compact 12-pin SON package measuring 2.5 mm by 4 mm with a height of 0.85 mm.

Battery Management Feature Summary

• Implements the proprietary Impedance Track™ algorithm for accurate fuel gauging without requiring extensive system firmware development.
• Resides on the system motherboard to manage both embedded non-removable batteries and removable battery packs.
• Provides comprehensive battery status metrics including remaining capacity, state of charge, and estimated run time.
• Features an internal temperature sensor for system temperature reporting and low-battery interrupt warnings.

Battery Management Applications

• Smartphones
• Personal Digital Assistants (PDAs)
• Digital still and video cameras
• Handheld terminals
• MP3 and multimedia players

Battery Management Procurement Notes

Verify the specific version suffix when ordering, as variants such as -V100 or -V130 exist with potential functional differences. Confirm current availability status, as some revisions may be discontinued. Ensure compatibility with the target I²C interface and verify that the 12-SON package dimensions fit the design constraints. Check for RoHS compliance requirements if applicable to the final product assembly.

Battery Management Selection Notes

Select this component for applications requiring high-accuracy fuel gauging with minimal software overhead. It is suitable for systems where the gauge resides on the main board rather than the battery pack. Consider the supported capacity range and operating temperature specifications (-40°C to +85°C) against the application environment. Ensure the host microcontroller supports the required I²C communication protocol for data retrieval.

Battery Management Part Context

This part belongs to the Texas Instruments BQ2750x series of Impedance Track™ fuel gauges. It is designed to work with single-cell lithium-ion and lithium-polymer chemistries. The device integrates the gauge logic into the system side, distinguishing it from pack-side solutions. It serves as a peripheral to the main processor, simplifying the integration process for portable electronic devices.

Battery Management Replacement Considerations

Direct substitutes include BQ27500-V100 and BQ27500-V130. Verify pinout and electrical parameter compatibility before substitution. Note that different version suffixes may indicate changes in firmware or feature sets. Consult the manufacturer's change list for specific differences between revisions.