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Datasheet Texas Instruments BQ27520YZFT-G4

Datasheet Texas Instruments BQ27520YZFT-G4

ManufacturerTexas Instruments
Part NumberBQ27520YZFT-G4

System Side Impedance Track™ Fuel Gauge With Integrated LDO. 15-DSBGA -40 to 85


  • Download » Datasheet, PDF, 1.1 Mb, Revision: B, 12-04-2015, File uploaded 03-20-2018
    bq27520-G4 System-Side Impedance Track™ Fuel Gauge With Integrated LDO datasheet
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    SLUSB20B – NOVEMBER 2012 – REVISED DECEMBER 2015 bq27520-G4 System-Side Impedance Track™ Fuel Gauge With Integrated LDO
    1 Features 2 1 Single-Series Cell Li-Ion Battery Fuel Gauge
    Resides on System Board
    – Integrated 2.5 VDC LDO
    – External Low-Value 10-mΩ Sense Resistor
    Patented Impedance Track™ Technology
    – Adjusts for Battery Aging, Self-Discharge,
    Temperature, and Rate Changes
    – Reports Remaining Capacity, State-of-Charge
    (SOC), and Time-to-Empty
    – Optional Smoothing Filter
    – Battery State-of-Health (Aging) Estimation
    – Supports Embedded or Removable Packs with
    up to 32A hr Capacity
    – Accommodates Pack Swapping With 2
    Separate Battery Profiles
    Microcontroller Peripheral Supports: ...


Family: BQ27520-G4


Lifecycle StatusActive (Recommended for new designs)
Manufacture's Sample AvailabilityNo


Package TypeYZF
Industry STD TermDSBGA
Package QTY250
CarrierSMALL T&R
Device MarkingBQ27520
Width (mm)2.75
Length (mm)1.75
Pitch (mm).5
Max Height (mm).625
Mechanical DataDownload »


Battery Capacity(Max)32000 mAh
Battery Capacity(Min)300 mAh
Cell BalancingN/A
Cell ChemistryLi-Ion/Li-Polymer
Communication InterfaceI2C
External Capacity IndicationNone
Gas Gauge AlgorithmIT (High accuracy)
Number of Series CellsSingle Cell
Operating Temperature Range-40 to 85 C
Package GroupDSBGA
Package Size: mm2:W x LSee datasheet (DSBGA) PKG
Special FeaturesN/A

Eco Plan


Design Kits & Evaluation Modules

  • Evaluation Modules & Boards: BQ27520EVM
    System-Side Impedance Track™ Battery Fuel Gauge Evaluation Module | Gas Gauge
    Lifecycle Status: Active (Recommended for new designs)

Application Notes

  • Download » Application Notes, PDF, 154 Kb, 02-22-2008
    Single Cell Gas Gauge Circuit Design
  • Download » Application Notes, PDF, 113 Kb, 09-01-2011
    How to Do Calibration and Create Golden DFI for Host Side Gas Gauge
    bq27510; bq27520; bq27500; bq27501; bq27410; bq27420; bq27505 How to do calibration and create Golden DFI for host side gas gauge
  • Download » Application Notes, PDF, 53 Kb, Revision: B, 05-15-2014
    Using I2C Communication With the bq275xx Series of Fuel Gauges (Rev. B)
  • Download » Application Notes, PDF, 564 Kb, 09-28-2011
    Thermistor Selection Guide for Texas Instruments Advanced Fuel Gauges
    bq20z40, bq20z45, bq20z60, bq20z65, bq20z70, bq20z75, bq20z80, bq20z90, bq20z95, bq27410, Thermistor Selection Guide for Texas Instruments Advanced Fuel Guages
  • Download » Application Notes, PDF, 608 Kb, 01-31-2008
    Theory and Implementation of Impedance Track Battery Fuel-Gauging Algorithm
    This application report outlines the theory of Impedance Track™ (IT) technology used in the bq2750x series of fuel gauge ICs for single-cell Li-ion applications (e.g., smart phones, media players, and PDAs). The implementation of the IT algorithm in the bq2750x family is reviewed, and the settings of data flash constants associated with the fuel-gauging algorithm is described in detail.
  • Download » Application Notes, PDF, 403 Kb, 02-22-2008
    Single Cell Impedance Track Printed-Circuit Board Layout
    bq20z70/90 Printed-Circuit Board Layout Guide
  • Download » Application Notes, PDF, 393 Kb, 03-21-2008
    Impedance Track Fuel Gauge Accuracy Test for GSM Phone Applications
    The Texas Instruments Impedance Track™ (IT) fuel gauge is designed for reporting remaining battery capacity and run time accurately. To effectively accomplish this reporting a real application environment must be used for test results. The test board should be designed as similar to the real application circuit as possible. This application report outlines the procedure for implementing an accurac
  • Download » Application Notes, PDF, 38 Kb, 10-23-2012
    bq27520-G3 to bq27520-G4 Change List
    bq27520-G3, bq27520-G4, bq27520-G2, bq27520-G1, bq27520EVM bq27520-G3 to bq27520-G4 Change List
  • Download » Application Notes, PDF, 118 Kb, 10-26-2016
    Enhanced Resolution Gauging for Low Current Applications Using Scaling
  • Download » Application Notes, PDF, 46 Kb, 05-12-2011
    Achieving the Successful Learning Cycle
    bq27500, bq27501, bq27510, bq27505, bq27541, bq27520 Achieving the Successful Learning Cycle
  • Download » Application Notes, PDF, 1.1 Mb, Revision: F, 10-09-2014
    Going to Production With the bq275xx (Rev. F)
  • Download » Application Notes, PDF, 350 Kb, Revision: A, 05-26-2010
    MSP430 Microcontroller SW for Handheld Fuel Gauges and Battery Authentication (Rev. A)
    MSP430, bq26100, bq26100EVM, bq26150, bq26150EVM, bq26500, bq27000, bq27000EVM, bq27200, b MSP430 Microcontroller Software for Handheld Fuel Gauge & Battery Authentication
  • Download » Application Notes, PDF, 188 Kb, 03-17-2011
    WinCE/Linux Drivers for bq275xx Fuel Gauge
    The bq275xx gas gauge integrated circuits (IC) can use an I2C line for communication with the host system. It is necessary to allow application-layer software on the host system to access parameters made available by the gas gauge IC. Multiple levels of abstraction are between the gauge and a given application. This document describes an example implementation of each of these layers in an effo
  • Download » Application Notes, PDF, 964 Kb, 01-07-2010
    How to Generate Golden Image for Single-Cell Impedance Track(TM) Devices
    Texas Instruments advanced fuel gauges, employing the Impedance Track™ algorithm, offer an unmatched array of features and benefits. Sometimes, however, the learning cycle to generate the golden image may seem a little challenging. In addition, determining the correct chemistry model and producing the golden image file can be time consuming. This application report describes the necessary p
  • Download » Application Notes, PDF, 140 Kb, Revision: B, 05-19-2016
    Host System Calibration Method (Rev. B)
    To add improvements to the Impedance Track™ algorithm, changes have been made to free up firmwarecode space. In the process of freeing up code space, the calibration calculations are no longerautomatically performed by the gauge but must be performed by the host and the results written back tothe gauge. This application note provides a flow on how to implement the calibration algorithm on a
  • Download » Application Notes, PDF, 107 Kb, Revision: A, 02-21-2011
    Updating bq275xx Firmware at Production (Rev. A)
    bq27500 bq27500-V100 bq27500-V120 bq27500-V130 bq27501 bq27505 bq27505-J2 bq27505-J3 bq275 Updating bq275xx Firmware at Production
  • Download » Application Notes, PDF, 152 Kb, 10-12-2007
    Host-Side Gas-Gauge-System Design Considerations for Single-Cell Handheld Apps
  • Download » Application Notes, PDF, 9.7 Mb, 07-28-2008
    Single Cell Gas Gauge Application Book
  • Download » Application Notes, PDF, 570 Kb, 03-11-2009
    Improving Battery Safety, Charging, and Fuel Gauging in Portable Media Apps
  • Download » Application Notes, PDF, 52 Kb, 10-11-2013
    Low-Power, Long Runtime Fuel Gauging Scheme

Moldel Line

Series: BQ27520-G4 (3)

Manufacturer's Classification

  • Semiconductors > Power Management > Battery Management Products > Battery Fuel Gauge

Other Names:

BQ27520YZFTG4, BQ27520YZFT G4

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