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BQ27425-G1

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System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery

Data sheet
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System-side Impedance Track™; fuel gauge with direct battery connection | gas gauge battery

BQ27425-G1

ACTIVE
Data sheet Order now

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) 4000 Implementation System External capacity indication None Operating temperature range (C) -40 to 85 open-in-new Find other Battery fuel gauges

Package | Pins | Size

DSBGA (YZF) 15 5 mm² 2.73 x 1.79 open-in-new Find other Battery fuel gauges

Features

  • Battery Fuel Gauge for 1-Series LiCoO2 battery Applications
  • Easy to Configure Battery Fuel Gauging Based on Patented Impedance Track Technology
    • Models Battery Discharge Curve for Accurate State-of-Charge Report
    • Automatically Adjusts for Battery Aging, Battery Self-Discharge, and
      Temperature/Rate Inefficiencies
    • Low-Value Integrated Sense Resistor
      (10 mΩ typical)
  • Resides on System Main Board
    • Works with Embedded or Removable Battery Packs
    • Integrated LDO allows devices to be powered directly from battery pack
  • Microcontroller Peripheral Provides:
    • Accurate Battery Fuel Gauging
    • Internal Temperature Sensor for Battery Temperature Reporting
    • Configurable Level of State-of-Charge (SOC) Interrupts
  • I2C for Connection to System Microcontroller Port
  • Small 15-pin 2,69 × 1,75 mm, 0.5 mm pitch CSP package
 open-in-new Find other Battery fuel gauges

Description

The Texas Instruments bq27425 system-side LiCoO2 battery fuel gauge is an easy to configure microcontroller peripheral that provides fuel gauging for single-cell LiCoO2 battery packs. The device requires minimal user configurations and system microcontroller firmware development for accurate fuel gauging.

The bq27425 uses the patented Impedance Track™ algorithm for fuel gauging, and provides information such as remaining battery capacity (mAh), state-of-charge (%), and battery voltage (mV).

Battery fuel gauging with the bq27425 requires only PACK+ (P+), PACK– (P–), for a removable battery pack or embedded battery circuit. The 15-pin 2,69 × 1,75 mm, 0.5 mm pitch CSP package is ideal for space constrained applications.

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Technical documentation

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Type Title Date
* Datasheet System-Side Impedance Track™ Fuel Gauge With Direct Battery Connection . datasheet Mar. 04, 2011
User guides bq27425 EVM: Single-Cell Impedance Track Technology (Rev. A) Jan. 18, 2013
Application notes bq27425-G1 to bq27425-Gx Change List Oct. 19, 2012
Application notes Configuring the bq27425G1-v2.02 Aug. 28, 2012
Application notes Going to Production With the bq27425 Apr. 23, 2012

Design & development

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

Software development

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

(...)
SUPPORT SOFTWARE Download
SLUC261HY.ZIP (496964 KB)
SUPPORT SOFTWARE Download
SLUC313A.ZIP (6373 KB)

Design tools & simulation

CAD/CAE SYMBOLS Download
SLUC138DJ.ZIP (6840 KB)

Reference designs

REFERENCE DESIGNS Download
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TIDA-00292 — This reference design is for a concept demonstration of how a driver's pulse rate, respiration rate, and ECG based heart rate can be obtained from a vehicle steering wheel.  AFE4400 and AFE4300 from TI's biometric family of analog front-ends (AFE), enables acquisition of all three parameters via (...)
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Optical Heart Rate Monitor Reference Design with BLE Connectivity
TIDA-00011 — This reference design is for a complete Optical Heart Rate Monitor wrist watch (no chest strap!) end equipment featuring TI signal chain, power, and connectivity components. With TI's AFE4400 AFE, you can accelerate and simplify your wrist based HRM design while still ensuring measurement (...)
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REFERENCE DESIGNS Download
Pulse Oximeter via Finger Clip Reference Design with BLE Connectivity
TIDA-00010 — This reference design is for a complete SPO2 Pulse Oximeter finger clip end equipment featuring TI signal chain, power, and connectivity components. With TI's AFE4490 Pulse Ox AFE, you can accelerate and simplify your pulse ox design while still ensuring the highest of quality clinical measurements (...)
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REFERENCE DESIGNS Download
System-side Impedance Track™ fuel (gas) gauge reference design
TIDA-00051 — 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 (...)
document-generic Schematic document-generic User guide

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Package Pins Download
DSBGA (YZF) 15 View options

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