The Texas Instruments bq27220 battery fuel gauge is a single-cell gauge that requires minimal user-configuration and system microcontroller firmware development, leading to quick system bring-up. The bq27220 device uses the Compensated End-of-Discharge Voltage (CEDV) algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime-to-empty (min), battery voltage (mV), temperature (°C), and state-of-health (%).
The bq27220 battery fuel gauge has ultra-low power consumption in NORMAL (50 µA) and SLEEP (9 µA) modes, leading to longer battery runtime. Configurable interrupts help save system power and free up the host from continuous polling. Accurate temperature sensing is supported via an external thermistor.
Customers can use preloaded CEDV parameters in ROM or can generate custom chemistry parameters using TI’s web-based tool, GAUGEPARCAL. Custom-generated parameters can be either programmed in the device RAM by the host on power up of the system or customers can program the parameters to an onboard One-Time Programmable (OTP) memory.
Battery fuel gauging with the bq27220 device requires connections only to PACK+ (P+) and PACK– (P–) for a removable battery pack or embedded battery circuit. The tiny, 9-ball, 1.62 mm × 1.58 mm, 0.5-mm pitch NanoFree chip scale package (DSBGA) is ideal for space-constrained applications.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | bq27220 Single-Cell CEDV Fuel Gauge datasheet (Rev. A) | PDF | HTML | 11 Apr 2016 |
| User guide | BQ27220 Technical Reference Manual (Rev. A) | PDF | HTML | 01 Nov 2022 | |
| Technical article | Battery-charging tips for video doorbell applications | PDF | HTML | 15 Apr 2019 | |
| Technical article | Achieving higher-accuracy battery fuel-gauge performance in ultra-low-power system | PDF | HTML | 09 May 2017 | |
| Application note | Gauge Communication | 12 Jan 2017 | ||
| Application note | Enhanced Resolution Gauging for Low Current Applications Using Scaling | 26 Oct 2016 | ||
| Application note | bq27220 Calibration Guide | 24 May 2016 | ||
| EVM User's guide | bq27220EVM-744 User's Guide | 11 Apr 2016 |
For additional terms or required resources, click any title below to view the detail page where available.
The BQ27220EVM-744 evaluation module is a complete evaluation system for the bq27220. The EVM includes one bq27220 circuit module with an external sense resistor. A separated orderable EV2400 PC interface board for gas gauge interface along with a PC USB cable, and Windows™-based PC software (...)
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 | CAD symbols, footprints & 3D models |
|---|---|---|
| DSBGA (YZF) | 9 | Ultra Librarian |
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
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Download Chemistry zip file for bqStudio & use 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.
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.