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Product details

Parameters

Cell chemistry Li-Ion/Li-Polymer, LiFePO4 Number of series cells Single Cell Communication interface HDQ, I2C Battery capacity (Min) (mAh) 200 Battery capacity (Max) (mAh) 16000 Implementation Pack External capacity indication None Features Impedance Track™ algorithm, Integrated Protector, 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 2.816 x 1.996 open-in-new Find other Battery fuel gauges

Features

  • Battery Fuel Gauge and Protector for Single-Cell Li-Ion Applications
  • Microcontroller Peripheral Provides:
    • Precision 16-Bit, High-Side Coulomb Counter with Low-Value Sense Resistor
      (5 mΩ to 20 mΩ)
    • External and Internal Temperature Sensors for Battery Temperature Reporting
    • Lifetime and Current Data Logging
    • 64 Bytes of Non-Volatile Scratch Pad Flash
    • SHA-1 Authentication Capability
  • Battery Fuel Gauging Based on Patented Impedance Track™ Technology
    • Models Battery Discharge Curve for Accurate Time-To-Empty Predictions
    • Automatically Adjusts for Aging, Self-Discharge, and Temperature- and Rate-Induced Effects on Battery
  • Integrated High-side NMOS Protection FET Drive
  • Hardware-based Safety and Protection:
    • Overvoltage (OVP)
    • Undervoltage (UVP)
    • Overcurrent in Charge (OCC)
    • Overcurrent in Discharge (OCD)
    • Short-Circuit in Discharge (SCD)
  • I2C and HDQ Interface Formats for Communication with Host System
  • Ultra-Compact, 15-Ball NanoFree™ DSBGA

All trademarks are the property of their respective owners.

open-in-new Find other Battery fuel gauges

Description

The Texas Instruments bq27742-G1 is a fuel gauge for single-cell Li-Ion battery packs that uses patented Impedance Track™ technology to deliver rate-, temperature-, and aging-compensated predictions of remaining battery capacity and system runtime with highest accuracy. The device also includes a fully integrated high-side protector that eliminates the need for a separate Li-Ion protection circuit and provides a full suite of high-accuracy fault detections for overvoltage, undervoltage, overcurrent in charge, overcurrent in discharge, and short-circuit in discharge conditions. The hardware protection functions offer built-in data flash-based programmability, allowing simple reconfiguration of existing devices for varying end equipment needs.

The fuel gauge provides information such as remaining battery capacity (mAh), state-of-charge (%), runtime to empty (minutes), voltage (mV), current (mA), and temperature (°C), as well as recording vital parameters throughout the lifetime of the battery. The device also supports interrupts to the host to indicate detection of a variety of important battery conditions to the system.

The DSBGA is a 15-ball package (2.78 mm × 1.96 mm) that is ideal for space-constrained applications.

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Download

Technical documentation

= Featured
No results found. Please clear your search and try again. View all 6
Type Title Date
* Datasheet bq27742-G1 Single-Cell Li-Ion Battery Fuel Gauge with Programmable Hardware Protection datasheet (Rev. D) Jan. 16, 2018
* User guides bq27742-G1 Single-Cell Impedance Track™ Battery Fuel Gauge TRM (Rev. C) Jul. 20, 2015
Technical articles How to run an Impedance Track gas gauge learning cycle Mar. 02, 2016
Technical articles Battery Terms Decoded: Part 1 Mar. 06, 2015
Technical articles Where’s the gauge? Part 3 Feb. 11, 2015
User guides bq27742EVM Single-Cell Impedance Track™ Technology Evaluation Module Jan. 31, 2014

Design & development

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

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$149.00
Description

The BQ27742EVM along with Battery Management Studio software provide the customer with tools for developing a battery fuel gauge module for placement inside a lithium-based battery pack.  Customers are able to configure the BQ27742EVM so that it can provide accurate battery fuel gauging (...)

Features
  • Complete evaluation system for the bq27742-G1 single cell Li-ion battery fuel gauge with programmable hardware protection
  • Populated circuit module for quick setup
INTERFACE ADAPTERS Download
document-generic User guide
$199.00
Description

Note: EV2300 is not supported for 64-bit Windows (Windows 7 and newer). This product continues to be in production to support existing customers. Replaecd by EV2400 for new designs, – The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.

The EV2300 is a (...)

Features
  • USB-based interface board for evaluation of battery fuel gauge circuits developed with fuel gauge ICs using the HDQ and SMBus communication protocol
  • Provides interface between intelligent battery circuit and a Windows-based PC
  • Connects to the USB port of a PC
  • Allows for on screen display and (...)
INTERFACE ADAPTERS Download
document-generic User guide
$199.00
Description

The EV2400 EVM interface board enables an IBM-compatible or other type PC (with the required driver for its particular platform) to communicate with the Texas Instruments SMBus or I2C interface gas gauges via a Universal Serial Bus (USB) port. In addition to this board, PC software is required to (...)

Features
  • Fully powered from the USB port
  • Optional 5-V port for powering high power voltage drivers (future upgrade)
  • Complete interface between the USB and SMBus, I2C (8/16) interfaces
  • Expansion port for future upgrades

Software development

APPLICATION SOFTWARE & FRAMEWORKS 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 & FRAMEWORKS Download
Gauging Parameter Calculator: Match chemistry for Impedance Track gauges
GPCCHEM GPC Chemistry ID matching for Impedance Track (IT) algorithm gas gauges (Find closest chemistry match) must be done before Optimizing room temperature or low temperature performance.

Gauging Parameter Calculator Chemistry ID matching for Impedance track gas gauges (GPCCHEM) is a math calculation and (...)

APPLICATION SOFTWARE & FRAMEWORKS Download
Gauging Parameter Calculator: Optimize room temperature performance for Impedance Track gauges
GPCRA0 Gauging Parameter Calculator – Optimize room temperature performance for Impedance track gas gauges (GPCRA0) / Golden GG Maker is a math calculation tool that helps the battery designer to refine the Impedance Track battery gauge parameters for a given battery profile. It provides optimized (...)
DRIVERS & LIBRARIES 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

(...)

FIRMWARE Download
SLUC606.ZIP (4083 KB)
SUPPORT SOFTWARE Download
SLUC558.ZIP (52 KB)
SUPPORT SOFTWARE Download
SLUC564FW.ZIP (2777 KB)

Reference designs

REFERENCE DESIGNS Download
bq27742 Complete Gauge and Protection For Single-Cell Li-ion Battery Packs
TIDA-00238 This reference design using bq27742 along with Battery Management Studio (Bqstudio) software  provides the customer with tools for develpping a battery fuel  gauge module for placement inside a lithium-based battery pack. Customers are able to configure the solution so that it can provide (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Pack-Side Impedance Track Fuel (Gas) Gauge Integrated Protector Reference Design
TIDA-00030 This reference design, using BQ27741 along with GaugeStudio software, provides the customer with tools for developing a battery fuel gauge module for placement inside a lithium-based battery pack. Customers are able to configure the solution so that it can provide accurate battery fuel gauging (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
DSBGA (YZF) 15 View options

Ordering & quality

Support & training

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