bq27742 Complete Gauge and Protection For Single-Cell Li-ion Battery Packs


Design files


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 accurate battery fuel gauging information. The integrated protection functionality can also be evaluated with this design. It gives the customer information such as battery voltage, temperature measurement, and Remaining State of Charge through its RAM registers. It also allows the customer to evaluate the BQ27742 IC according to the datasheet

  • Incoporates  patented Impedance track Technology which maximizes battery usuage
  • Automatically adjusts for aging, self discharge as well as temperature effects on battery
  • Integrated hardware based protection ensures the safety of battery pack   
  • I2C communication bus allows for system interaction and control over the battery
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Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDU460.PDF (209 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDR934.PDF (98 K)

Detailed schematic diagram for design layout and components

TIDR937.PDF (76 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDC536.ZIP (1003 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

Battery fuel gauges

BQ27742-G1Single cell Li-ion battery fuel gauge with integrated protection | battery gas gauge

Data sheet: PDF | HTML

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Evaluation board

BQ27742EVM — bq27742-G1 Single Cell Li-ion Battery Fuel (Gas) Gauge Programmable Evaluation Module

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 (...)

User guide: PDF
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Technical documentation

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Type Title Date
Test report TIDA-00238 Test Results Jul. 28, 2014

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