The Texas Instruments BQ27Z561 Impedance Track™ gas gauge solution is a highly integrated, accurate 1-series cell gas gauge with a flash programmable custom reduced instruction-set CPU (RISC) and SHA-256 authentication for Li-Ion and Li-Polymer battery packs. The 1-series cell capability includes parallel cells for increased capacity.
The BQ27Z561 gas gauge communicates via I2C-compatible and HDQ one-wire interfaces and includes several key features that can help facilitate accurate gas gauging applications. Integrated temperature sense functions (internal and external options) enable system and battery temperature measurements. The integrated SHA-256 functionality helps enable secure identification between systems and packs. The interrupt function facilitates the BQ27Z561 device to inform the system when a state-of-charge (SOC), voltage, or temperature fault occurs. The low-voltage operation enables the system to continue monitoring the battery even in deeply discharged conditions. During low-activity situations, the device can be set to the low power coulomb counting (CC) mode, which allows the device to continue its coulomb counting while reducing operating current significantly.
Please see the BQ27z561-R2 for the latest firmware release.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | BQ27Z561 Impedance Track™ Battery Gas Gauge Solution for 1-Series Cell Li-Ion Battery Packs datasheet (Rev. B) | PDF | HTML | 06 Aug 2019 |
| Certificate | BQ27Z561EVM-011 EU RoHS Declaration of Conformity (DoC) (Rev. A) | 12 Jul 2022 | ||
| User guide | BQ27Z561EVM-011 Single-Cell Impedance Track Technology (Rev. A) | PDF | HTML | 12 Jul 2022 | |
| User guide | BQ27Z561-R2 Technical Reference Manual (Rev. B) | 07 May 2020 | ||
| Application note | End of Discharge SOC Jump Elimination | PDF | HTML | 06 Apr 2020 | |
| Application note | BQ27Z561-R1 to BQ27Z561-R2 Change List | 26 Feb 2020 | ||
| Application note | Impedance Track Optimization for Applications Without Significant Rest Periods | 15 Oct 2019 | ||
| User guide | bq27z561 Technical Reference Manual | 26 Jun 2018 | ||
| Application note | Simple Guide to Chemical ID Selection Tool (GPC) (Rev. A) | 05 Jun 2018 | ||
| Application note | Gauge Communication | 12 Jan 2017 |
For additional terms or required resources, click any title below to view the detail page where available.
This evaluation module (EVM) is a complete evaluation system for the BQ27Z561 battery management system. The EVM includes a BQ27Z561 integrated circuit (IC) and all other components necessary to monitor and predict capacity and other parameters of a 1-series Li-ion or Li-polymer battery pack. The (...)
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 (...)
| Package | Pins | Download |
|---|---|---|
| DSBGA (YPH) | 12 | View options |
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Windows Installer for Battery Management Studio (bqStudio)
Download Chemistry zip file for bqStudio & use bqStudio Help menu to import the latest chemistries.
Battery Management Studio (bqStudio) Documentation
Battery Management Studio (bqStudio) change summary documentation
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 support for real-time watching, graphing, and logging, an easy interface to send commands, direct low-level communication and I/O, as well as automated and guided support for configuration, calibration, performing a learning cycle, and generating useful files for taking the device to production.
Older products such as bq20xxx and bq30xxx are not supported in bqStudio. Download the specific evaluation software from the appropriate product page.
Requires: EV2400 or MKST-3P-ALT-EV2300
Windows Installer for Battery Management Studio (bqStudio)
Use this file with Battery Management Studio (bqStudio) Help menu to import the latest chemistries.
Battery Management Studio (bqStudio) Documentation
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 support for real-time watching, graphing, and logging, an easy interface to send commands, direct low-level communication and I/O, as well as automated and guided support for configuration, calibration, performing a learning cycle, and generating useful files for taking the device to production.
Older products such as bq20xxx and bq30xxx are not supported in bqStudio. Download the specific evaluation software from the appropriate product page.