The Texas Instruments BQ27Z855 Dynamic Z-Trackgas gauge solution is a fully integrated, accurate 1-series cell gas gauge, protection, current limiter, and authentication solution.
The BQ27Z855 device provides a fully integrated pack-based solution with a flash programmable reduced instruction-set CPU (RISC), safety protection, current limiter, ideal diode controller, and authentication for 1-series cell Li-ion and Li-polymer battery packs.
The BQ27Z855 gas gauge communicates through an I2C compatible interface and combines an ultra-low power RISC processor, high accuracy analog measurement capabilities, integrated flash memory, high-side NMOS FET drivers, and ECC ECDSA and SHA-2 authentication to provide a complete, high-performance battery management solution.
| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | BQ27Z855 Dynamic Z-Track™ Gauge with Integrated Protection, Current Limiter, and Authentication for 1 Cell Battery Packs datasheet | PDF | HTML | Feb 12, 2026 |
| * | User guide | BQ27Z855 Technical Reference Manual (Rev. A) | PDF | HTML | Jul 21, 2026 |
| Application note | Dynamic Z-Track™ Technology: An Advanced Battery Gauging Algorithm for Dynamic Load Applications (Rev. A) | PDF | HTML | Jul 15, 2025 | |
| Application note | Implementation of Elliptic Curve Cryptography Authentication on TI Battery Fuel Gauges | PDF | HTML | May 28, 2025 | |
| Application note | How to Create and Program Authentication Keys into TI Battery Fuel Gauges | PDF | HTML | Mar 5, 2025 | |
| Application note | Battery Gauging Algorithm Comparison | PDF | HTML | Dec 4, 2023 |
For additional terms or required resources, click any title below to view the detail page where available.
The BQ27Z855 Evaluation Module (EVM) is a system-level board created to enable users to evaluate the functionalities of the BQ27Z855 fuel gauge within their system. The BQ27Z855 EVM is suitable for applications in which the battery pack is 1-S cell, meaning one series cell. The EVM includes a (...)
Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
Battery Management Studio (bqStudio) offers a full suite of robust tools to assist with the process of evaluating, designing with, configuring, testing, or otherwise utilizing TI Battery management products. This includes features that provide full access to registers and data memory including (...)
BQ-BATTERY-PROGRAMMER-SW software development kit (SDK) is a collection of robust software command line tools that assist with the process of programming, testing, or assembling packs that use TI Battery management products. The executables in this software work with the MKST-3P-ALT-EV2300 MKS (...)
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YAH) | 15 | Ultra Librarian |
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