BQ34Z950DBT

Battery Management Overview

The BQ34Z950DBT is a single-chip fuel gauge and protection IC for 2 to 4 series lithium-ion or lithium-polymer battery packs. It utilizes the patented Impedance Track™ technology to monitor capacity, impedance, and open-circuit voltage with less than 1% error over the battery's life. The device integrates an SMBus interface and an optional DQ communication port. It operates within a temperature range of -40°C to +85°C and is housed in a 44-pin TSSOP package.

Battery Management Feature Summary

• Patented Impedance Track™ algorithm provides high-accuracy fuel gauging by continuously analyzing battery impedance and aging.
• Integrated system management bus (SMBus) and optional one-wire DQ interface for flexible host controller communication.
• Combines complete battery protection functions with fuel gauging in a single integrated circuit to reduce external component count.
• Supports programmable protection thresholds for voltage, current, and temperature compliant with JEITA standards.

Battery Management Applications

• Smart battery packs for portable electronics
• Medical devices requiring precise state-of-charge monitoring
• Power tools and industrial equipment using multi-cell Li-Ion/Li-Po batteries
• Uninterruptible power supplies (UPS) and backup systems

Battery Management Procurement Notes

Verify the specific suffix DBT against the manufacturer's latest datasheet to confirm the 44-TSSOP package configuration. Confirm that the part status aligns with current design-in requirements, as availability may vary. Ensure compatibility with the target host controller's SMBus protocol implementation before finalizing procurement decisions.

Battery Management Selection Notes

Select this component when a unified solution for both fuel gauging and protection is required for 2 to 4 series cells. It is suitable for designs needing SBS 1.1 compliance and SHA-1 authentication support. Consider the 44-pin TSSOP footprint constraints and the need for an optional DQ interface if standard SMBus communication is insufficient for the application.

Battery Management Part Context

This part belongs to Texas Instruments' Impedance Track™ family of fuel gauges. It is designed to replace discrete solutions by integrating analog front-end protection with digital fuel gauging capabilities. The device supports smart battery specifications and offers advanced diagnostics through its communication interfaces.

Battery Management Replacement Considerations

Check for updated revisions or alternative packages within the BQ34Z950 family. Verify pin-to-pin compatibility if substituting with other TI fuel gauges. Consult official change notifications for any manufacturing process updates that might affect form, fit, or function.

Battery Management FAQ

What battery chemistries does the BQ34Z950DBT support?

It supports Lithium-ion and Lithium-polymer battery chemistries.

Does the BQ34Z950 include cell balancing features?

No, the BQ34Z950 does not include internal cell balancing; it focuses on fuel gauging and protection.

What is the maximum number of series cells supported?

The device supports configurations from 2 to 4 series cells.