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Product details

Parameters

Cell chemistry Li-Ion/Li-Polymer Number of series cells Single Cell Communication interface I2C Battery capacity (Min) (mAh) 300 Battery capacity (Max) (mAh) 8000 Implementation System External capacity indication None Features Battery Management Unit, SHA-1 Authentication Operating temperature range (C) -40 to 85 Cell balancing open-in-new Find other Battery fuel gauges

Package | Pins | Size

DSBGA (YZF) 15 5 mm² 2.65 x 1.996 open-in-new Find other Battery fuel gauges

Features

  • Battery Fuel Gauge and Charger Controller for 1-
    Cell Li-Ion Applications
  • Resides on System Main Board
  • Battery Fuel Gauge Based on Patented
    Impedance Track™ Technology
    • Models the Battery Discharge Curve for
      Accurate Time-to-Empty Predictions
    • Automatically Adjusts for Battery Aging,
      Battery Self-Discharge, and Temperature/Rate
      Inefficiencies
    • Low-Value Sense Resistor (5 mΩ to 20 mΩ)
  • Battery Charger Controller With Customizable
    Charge Profiles
    • Configurable Charge Voltage and Current
      Based on Temperature
    • Optional State of Health (SoH) and Multilevel-
      Based Charge Profiles
  • Host-Free Autonomous Battery Management
    System
    • Reduced Software Overhead Allows for Easy
      Portability Across Platforms and Shorter OEM
      Design Cycles
    • Higher Safety and Security
  • Intelligent Charging\x97Customized and Adaptive
    Charging Profiles
    • Charger Control Based on SoH
    • Temperature Level Charging (TLC)
  • Battery Charger Controller for bq2419x Single-Cell
    Switched-Mode Battery Charger
    • Stand-Alone Charging Solution
    • SHIP Mode Capability
  • 400-kHz I2C Interface for Connection to System
    Microcontroller Port
  • In a 15-Pin NanoFree™ Packaging
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Description

The Texas Instruments bq27531-G1 system-side Li- Ion Battery Management Unit is a microcontroller peripheral that provides Impedance Track fuel gauging and charging control for single-cell Li-Ion battery packs. The device requires little system microcontroller firmware development. Together with the bq2419x Single-Cell Switched-Mode Charger, the bq27531-G1 manages an embedded battery (nonremovable) or a removable battery pack.

The bq27531-G1 uses the patented Impedance Track algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-ofcharge (%), run time to empty (minimum), battery voltage (mV), temperature (°C), and state of health (%).

Battery fuel gauging with the bq27531-G1 requires only PACK+ (P+), PACK– (P–), and Thermistor (T) connections to a removable battery pack or embedded battery circuit. The CSP option is a 15-pin package in the dimensions of 2.61 mm × 1.96 mm with a 0.5-mm lead pitch, which is ideal for spaceconstrained applications.

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Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet bq27531-G1 Battery Management Unit Impedance Track Fuel Gauge With MaxLife Technology for Use With the bq2419x Charger Controller datasheet (Rev. C) Jan. 25, 2016
User guide bq27531-G1 Technical Reference Manual (Rev. A) Jul. 02, 2018
Application note Achieving The Successful Learning Cycle Jun. 19, 2018
Application note Host System Calibration Method (Rev. B) May 19, 2016
Application note Going to Production With the bq275xx (Rev. F) Oct. 09, 2014
Application note Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B) May 15, 2014
Application note Going to Production With the bq275xx (Rev. E) Jan. 20, 2012
Application note Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges Sep. 28, 2011
Application note How to Do Calibration and Create Golden DFI for Host Side Gas Gauge Sep. 01, 2011
Application note WinCE/Linux Drivers for bq275xx Fuel Gauge Mar. 17, 2011
Application note Updating bq275xx Firmware at Production (Rev. A) Feb. 21, 2011
Application note How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices Jan. 07, 2010
Application note Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps Mar. 11, 2009
Application note Single Cell Gas Gauge Application Book Jul. 28, 2008
Application note Impedance Track Fuel Gauge Accuracy Test for GSM Phone Applications Mar. 21, 2008
Application note Single Cell Gas Gauge Circuit Design Feb. 22, 2008
Application note Single Cell Impedance Track Printed-Circuit Board Layout Feb. 22, 2008
Application note Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm Jan. 31, 2008
Application note Host-Side Gas-Gauge-System Design Considerations for Single-Cell Handheld Apps Oct. 12, 2007

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

Battery Management Unit Impedance Track™ Fuel (Gas) Gauge and bq24192 4.5-A, Switch-Mode Battery Charger for Single-Cell Applications

The bq27531 evaluation module (EVM) has a bq27531-G1 gas gauge that directly communicates with bq24192 single-cell, Li-Ion battery charger via I2C. This complete (...)
Features
  • IN input operating range of 4.2 V – 10 V
  • USB input operating range of 4.2 V – 6 V
  • LED indication for status signals
  • Test points for key signals available for testing purposes.

Software development

DRIVER OR LIBRARY Download
Linux Driver for BQ27XXX
BQ27XXXSW-LINUX The Linux driver supports the BQ27x series of Battery Fuel Gauges. The Linux driver supports communication through the I2C/HDQ bus and interfaces with the power supply sub-system to monitor battery properties.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

(...)

DRIVER OR LIBRARY Download
SLUC453.ZIP (47 KB)
FIRMWARE Download
SLUC606.ZIP (4083 KB)
SUPPORT SOFTWARE Download
SLUC455.ZIP (7409 KB)

Reference designs

REFERENCE DESIGNS Download
I2C Controlled 4.5A Single Cell USB / Adaptor Charger Reference Design
TIDA-00035 This reference design is a highly-integrated switch-mode battery charge management and system power path management solution for single cell Li-Ion and Li-polymer battery in a wide range of tablet and other portable devices. Its low impedance power path optimizes switch-mode operation efficiency (...)
document-generic Schematic

CAD/CAE symbols

Package Pins Download
DSBGA (YZF) 15 View options

Ordering & quality

Information included:
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  • 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.

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