Top

Product details

Parameters

Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 100 Battery capacity (Max) (mAh) 29000 Implementation Pack, System External capacity indication None Features CEDV algorithm Operating temperature range (C) -40 to 85 Cell balancing open-in-new Find other Battery fuel gauges

Package | Pins | Size

DSBGA (YZF) 9 3 mm² 1.62 x 1.66 open-in-new Find other Battery fuel gauges

Features

  • Single-Cell Li-Ion Battery Fuel Gauge
    • Resides in Pack or on System Board
    • Supports Embedded or Removable Batteries
    • Powers Directly from Battery with Integrated
      LDO
    • Supports a Low-Value (10-mΩ) External Sense
      Resistor
  • Ultra-Low Power Consumption in NORMAL
    (50 µA) and SLEEP (9 µA) Modes
  • Battery Fuel Gauging Based on Compensated
    End-of-Discharge Voltage (CEDV) Technology
    • Reports Remaining Capacity and State-of-
      Charge (SOC) with Smoothing Filter
    • Adjusts Automatically for Battery Aging, Self-
      Discharge, Temperature, and Rate Changes
    • Provides Battery State-of-Health (Aging)
      Estimation
  • Microcontroller Peripheral Supports:
    • 400-kHz I2C™ Serial Interface
    • Configurable SOC Interrupt OR
      Battery Low Digital Output Warning
    • Internal Temperature Sensor OR
      Host-Reported Temperature OR
      External Thermistor
open-in-new Find other Battery fuel gauges

Description

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.

open-in-new Find other Battery fuel gauges
Download

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 8
Type Title Date
* Datasheet bq27220 Single-Cell CEDV Fuel Gauge datasheet (Rev. A) Apr. 11, 2016
* User guide bq27220 Technical Reference Manual Apr. 12, 2016
Technical articles Battery-charging tips for video doorbell applications Apr. 15, 2019
Technical articles Achieving higher-accuracy battery fuel-gauge performance in ultra-low-power systems May 09, 2017
Application note Gauge Communication Jan. 12, 2017
Application note Enhanced Resolution Gauging for Low Current Applications Using Scaling Oct. 26, 2016
Application note bq27220 Calibration Guide May 24, 2016
User guide bq27220EVM-744 User's Guide Apr. 11, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
99
Description

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 (...)

Features
  • External sense and temperature sensor
  • Quick and easy set-up
  • Low power mode for active fuel gauging
  • Small solution size is ideal for space-constrained applications
  • CEDV+, Fixed profiles

Software development

APPLICATION SOFTWARE & FRAMEWORK Download
Battery Management Studio (bqStudio) Software
BQSTUDIO 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 (...)
Features
  • Real-time Gauge Dashboard for monitoring basic registers
  • Full register access and logging
  • Full data memory access and logging
  • Product configuration and monitoring tools
  • Import and export of product configurations
  • Calibration and test automation
  • Export of FS files for the target production environment 
APPLICATION SOFTWARE & FRAMEWORK Download
Gauging Parameter Calculator for CEDV gauges
GPCCEDV Gauging Parameter Calculator (GPC) is a math calculation and simulation tool that helps the battery designer to obtain matching Compensated End of Discharge Voltage (CEDV) coefficients for the specific battery profile. The tool allows the user to increase the accuracy of the fuel gauge IC over (...)
SUPPORT SOFTWARE Download
SLUC608.ZIP (4214 KB)

Design tools & simulation

CALCULATION TOOL Download

CAD/CAE symbols

Package Pins Download
DSBGA (YZF) 9 View options

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

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

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​​​​​​​

Videos