System-side Impedance Track™ fuel (gas) gauge reference design
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Key Document


This reference design is a complete solution that includes one bq27425-G2B circuit module with an integrated current-sense resistor. A separated orderable EV2300 or EV2400 PC interface board for gas gauge interface along with a PC USB cable, and Windows™-based PC software is needed when using this design. The circuit module includes one bq27425-G2B integrated circuit and all other onboard components necessary to monitor and predict capacity for a system-side fuel gauge solution. The reference design connects directly across the battery pack. With the EV2300 or EV2400 interface board and software, the user can:

  • # Series Cells: 1S
  • Max Input Volts: 4.5V
  • Max Charge Current: 2A
  • Communication: I2C
  • Integrated sense resistor
  • This EVM requires the use of a communications tranciever, the EV2400.

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Schematic/Block Diagram

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Test Data

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
BQ24160  1-cell, 2.5-A, dual-input, buck Li-ion battery charger with Power Path and D+/D- with JEITA  Battery management ICs  Sample & Buy View Design Kits & Evaluation Modules
BQ27425-G1  System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery  Battery management ICs  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
BQ24160 Download Download
Download -
(YFM) | 49 Download -
BQ27425-G1 Download -

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Technical documentation

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User guide (1)
Title Type Size (KB) Date
PDF 701 27 Aug 2013
Design files (3)
Title Type Size (KB) Date
PDF 273 27 Aug 2013
PDF 42 27 Aug 2013
PDF 42 27 Aug 2013

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