Firmware
BQ27Z846
Pack-Side Single Cell Fuel Gauge with Integrated Protector and Dynamic Z-Track
Data sheet
BQ27Z846
- Fully integrated battery gas gauge, protector, and authenticator
- Battery chemistries supported include Li-ion with LCO, NMC, or LFP cathodes and with graphite or silicon anodes
- Battery fuel gauging based on patented Dynamic Z-Track technology
- Models battery impedance for accurate time-to-empty predictions for static and dynamic loads
- Automatically adjusts for aging, temperature, and rate-induced effects on the battery
- High-accuracy analog front end with two independent ADCs:
- 18-bit low offset, high resolution delta-sigma ADC for coulomb counting with ±100mV input range
- 16-bit delta-sigma ADC for cell voltage and internal and external temperature sensors
- High-side or low-side current sensing for system flexibility
- Programmable safety and protection:
- Hardware-level OVP, UVP, OCC, OCD, SCD protections
-
Firmware-level OVP, UVP, OCC, OCD, UT, OT, FETF, CTO, PCHGC, and more...
- Integrated high efficiency high-side NMOS protection FET drivers
- Up to 1MHz I2C bus communications interface with 1.2V- and 1.8V-level support
- ECC ECDSA and SHA-256 authentication support with secure memory
-
Wake from push-button or charger detect
-
True zero-volt charging to support dead battery charging
- Ultra-compact, 15-ball DSBGA package (YAH)
The Texas Instruments BQ27Z846 Dynamic Z-Trackgas gauge device is a fully integrated and accurate,1-series cell gas gauge, protection, and authentication option.
The BQ27Z846 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 option.
Technical documentation
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| Top documentation | Type | Title | Format options | Date |
|---|---|---|---|---|
| * | Data sheet | BQ27Z846 Dynamic Z-Track™ Gauge with Integrated Protection and Authentication for 1 Cell Battery Packs datasheet | PDF | HTML | 30 Apr 2026 |
| User guide | BQ27z846 Technical Reference Manual | PDF | HTML | 03 Sep 2025 | |
| Application note | Dynamic Z-Track™ Technology: An Advanced Battery Gauging Algorithm for Dynamic Load Applications (Rev. A) | PDF | HTML | 15 Jul 2025 | |
| Application note | Implementation of Elliptic Curve Cryptography Authentication on TI Battery Fuel Gauges | PDF | HTML | 28 May 2025 | |
| Application note | How to Create and Program Authentication Keys into TI Battery Fuel Gauges | PDF | HTML | 05 Mar 2025 | |
| Application note | Battery Gauging Algorithm Comparison | PDF | HTML | 04 Dec 2023 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.
Evaluation board
BQ27Z846EVM — BQ27Z846 evaluation module
The BQ27Z846 evaluation module (EVM) is a system-level board created to enable users to evaluate the functionalities of the BQ27Z846 fuel gauge within a system. The BQ27Z846 EVM is suitable for applications in which the battery pack is 1-S cell, meaning one series cell. The EVM includes a BQ27Z846 (...)
GUI for evaluation module (EVM)
BQSTUDIO-GUI — Battery Management Studio (bqStudio) Software - Web Based Version
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 (...)
Supported products & hardware
Software programming tool
BQ-BMS-PROGRAMMER-SW — Command line programmers for BQ products
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 (...)
Supported products & hardware
Design tool
BQ27Z846-DS — BQ27z846 documentation & software
Early access to bq27z846 documentation and assets. PLEASE DO NOT SEND OVER EMAIL. CUSTOMERS CAN REUQEST ACCESS.
Supported products & hardware
Simulation tool
BQAMBER-SIM-TOOL — BGP release page for BQAMBER-SIM-TOOLS
BGP release page for BQAMBER-SIM-TOOLS
Supported products & hardware
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YAH) | 15 | Ultra Librarian |
Ordering & quality
Information included:
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Information included:
- Fab location
- Assembly location
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
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