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clear gifBQ20Z70, Status:NRND
SBS 1.1 Compliant Gas Gauge Enabled w/Impedance Track Tech For bq29330 no LEDs
 
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Product is Not Recommended for New Design (NRND)
Replaced By:
Part # Comments
BQ20Z70-V110 The device is an EXACT EQUIVALENT in functionality and parametrics to the compared device. 


Product Features and DescriptionFeaturesRequest Free SamplesSamplesTechnical Documents: app notes, user guides, models, and product bulletinsTechnical Documents
Quality: Product Contents, MTBF/FIT Rate and Moisture SensitivityQuality & Pb-Free DataPrice and Packaging InformationPricing/PackagingDownload Application NotesApplication Notes
related productsRelated ProductsInventory, Leadtime, and AvailabilityInventoryModels: BSDL, IBIS, or SPICESimulation Models
Tools & Software: EVMs, CCStudio, and developerTools & Software Download CAD Design ToolsSymbols/FootprintsAccess Reference DesignsReference Designs

 Datasheet
Download Datasheet
SBS 1.1 Compliant Gas Gauge Enabled w/Impedance Track Tech for bq29330 (Rev. B) (bq20z70.pdf, 507 KB)
17 Oct 2006 Download
bq20z70 + bq29330 Chipset Technical Reference (Rev. A) (sluu250a.pdf, 1337 KB)
22 Jun 2006 Download

BQ20Z70
Charge vs Discharge RelationshipC=D  
Battery Capacity(Min)(mAh)800  
Battery Capacity(Max)(mAh)15000  
Communication InterfaceSMBus  
Pin/Package20TSSOP  
Approx. Price (US$) 2.90 | 1ku  
 Samples
 Inventory

Product Information
Back to TopFeatures
  • Next Generation Patented Impedance Track™ Technology accurately Measures Available Charge in Li-Ion and Li-Polymer Batteries
  • Better than 1% Error Over Lifetime of the Battery
  • Instant Accuracy – No Learning Cycle Required
  • Supports the Smart Battery Specification SBS V1.1
  • Powerful 8-Bit RISC CPU With Ultra-Low Power Modes
  • Works With the TI bq29330 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics Solution
  • Full Array of Programmable Protection Features
    • Voltage, Current and Temperature
  • Fully Integrated High Accurate Clock
  • Flexible Configuration for 2 to 4 Series Li-Ion and Li-Polymer Cells
  • Integrated Field Programmable FLASH Memory Eliminates the Need for External Configuration Memory
  • Smart Battery Charger Control Feature
  • Two 16-Bit Delta-Sigma Converter
    • Accurate Voltage and Temperature Measurements
    • Integrating Coloumb Counter for Charge Flow
      • Better Than 0.65 nVh of Resolution
      • Self-Calibrating
  • Supports SHA-1 Authentication
  • 20-Pin TSSOP (PW)
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

IMPEDANCE TRACK Is a trademark of Texas Instruments
Back to TopDescription

The bq20z70 SBS-compliant gas gauge IC, incorporating patented Impedance Track™ technology, is designed for battery-pack or in-system installation. The bq20z70 measures and maintains an accurate record of available charge in Li-ion or Li-polymer batteries using its integrated high-performance analog peripherals. The bq20z70 monitors capacity change, battery impedance, open-circuit voltage, and other critical parameters of the battery pack, and reports the information to the system host controller over a serial-communication bus. It is designed to work with the bq29330 analog front-end (AFE) protection IC to maximize functionality and safety, and minimize component count and cost in smart battery circuits.

The Impedance Track technology continuously analyzes the battery impedance, resulting in superior gas-gauging accuracy. This enables remaining capacity to be calculated with discharge rate, temperature, and cell aging all accounted for during each stage of every cycle.
Analog eLab(TM) Design Center

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Pricing/Packaging/CAD Design Tools/Samples
Back to TopPricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Budget Price
($US) | QTY		Industry Standard
(TI Pkg) | Pins		Top Side MarkingStandard Pack Quantity | Package CarrierSymbolsFootprintsSamples
BQ20Z70PWACTIVE-40 to 852.90 | 1kuTSSOP (PW) | 20 View 70 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ20Z70PWG4ACTIVE-40 to 852.90 | 1kuTSSOP (PW) | 20 View 70 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ20Z70PWRACTIVE-40 to 852.90 | 1kuTSSOP (PW) | 20 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ20Z70PWRG4ACTIVE-40 to 852.90 | 1kuTSSOP (PW) | 20 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples

* Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For higher volume price quotes,prices in local currency or delivery quotes, please contact your local Texas Instruments Sales Office or Authorized Distributor.


Inventory
Back to TopTI Inventory StatusReported Distributor Inventory
BQ20Z70PWAs of 9:03 AM GMT, 6 Aug 2008As of 9:03 AM GMT, 6 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 280* >10k | 18 Nov 6 Weeks AmericasArrow 70 Buy Now
  EuropeAvnet-SILICA 420 Buy Now
BQ20Z70PWG4As of 9:03 AM GMT, 6 Aug 2008As of 9:03 AM GMT, 6 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 280* >10k | 18 Nov 6 Weeks None Reported
View Distributors		  
BQ20Z70PWRAs of 9:03 AM GMT, 6 Aug 2008As of 9:03 AM GMT, 6 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 18 Nov 15 Weeks None Reported
View Distributors		  
BQ20Z70PWRG4As of 9:03 AM GMT, 6 Aug 2008As of 9:03 AM GMT, 6 Aug 2008
 In StockIn Progress QTY | DateLead TimeRegionCompanyIn StockPurchase
 0* >10k | 18 Nov 15 Weeks None Reported
View Distributors		  
View all Distributors
 
* Our information is updated daily, so please check back with us soon if this does not meet your needs. You may also contact your TI Authorized Distributor , including those listed above, for real time stock information.** Lead time information is not available at this time. However, our information is updated daily so please check back with us soon. Please contact your preferred TI Authorized Distributor for additional information. 

Quality & Lead (Pb)-Free Data
Back to TopProduct ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
BQ20Z70PW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ20Z70PWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ20Z70PWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ20Z70PWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
* The planned eco-friendly classification: Pb-Free (RoHS) or Pb-Free (RoHS Exempt) or Green (RoHS & no Sb/Br) - please click on the Product Content Details "View" link in the table above for the latest availability information and additional product content details. If the information you are requesting is not available online at this time, contact one of our Product Information Centers regarding the availability of this information.


Technical Documents
Back to TopDatasheets
SBS 1.1 Compliant Gas Gauge Enabled w/Impedance Track Tech for bq29330 (Rev. B) (bq20z70.pdf, 507 KB)
17 Oct 2006 Download
bq20z70 + bq29330 Chipset Technical Reference (Rev. A) (sluu250a.pdf, 1337 KB)
22 Jun 2006 Download
Back to TopApplication Notes
Information to Provide when Reporting Issues with TI Gauges (slua474.htm, 8 KB)
26 Jun 2008 Abstract
bq20z70, bq20z75, bq20z90, and bq20z95 Voltage Current & Measurement Accuracy (slua459.htm, 8 KB)
18 Mar 2008 Abstract
bq20z70-V110 to bq20z70-V150 Change List (slua452.htm, 8 KB)
11 Jan 2008 Abstract
Cell-type Specific Settings for Cell Imbalance Permanent Failure Thresholds (slua433.htm, 8 KB)
28 Sep 2007 Abstract
Quick-Start Guide for bq20zxx Family Gas Gauges (Rev. A) (slua421a.htm, 8 KB)
04 Sep 2007 Abstract
Fast Cell Balancing Using External MOSFET (slua420.htm, 8 KB)
03 May 2007 Abstract
Evaluation 3: Theory/Implementation Impedance Track Battery Fuel-Gauging Algo (Rev. B) (slua364b.htm, 8 KB)
20 Dec 2006 Abstract
Configuring the bq20z70 Data Flash (slua405.htm, 8 KB)
20 Dec 2006 Abstract
bq20z70 and bq20z90 Application Book (slua404.htm, 8 KB)
13 Dec 2006 Abstract
Evaluation 7: Preparing Optimized Data Flash Constants (Rev. B) (slua334b.htm, 8 KB)
04 Dec 2006 Abstract
Exploring the bq20z70/90 Impedance Track(TM) Evaluation Kit (slua396.htm, 8 KB)
27 Nov 2006 Abstract
Cell Balancing Using the bq20zxx (Rev. B) (slua340b.htm, 8 KB)
09 Nov 2006 Abstract
Updating Firmware With the bq20zxx and EVM (Rev. B) (slua336b.htm, 8 KB)
07 Nov 2006 Abstract
Pack Assembly and the bq20zxx (Rev. B) (slua335b.htm, 8 KB)
07 Nov 2006 Abstract
bq20z80 EVM Data Flash Settings for Num of Serial Cells/Pack Cap (Rev. B) (slva208b.htm, 8 KB)
06 Nov 2006 Abstract
Evaluation 1: Impedance Track Gas Gauge for Novice – bq20z70/z90 (slua397.htm, 8 KB)
09 Oct 2006 Abstract
Thermistor Coefficient Calculator for TI Advanced Fuel Gauges (slua398.htm, 8 KB)
04 Oct 2006 Abstract
bq20z70/90 Gas Gauge Circuit Design (slua393.htm, 8 KB)
23 Aug 2006 Abstract
bq20z70/90 Printed-Circuit Board Layout Guide (slua392.htm, 8 KB)
02 Aug 2006 Abstract
Battery Pack Production Flow With bq20zXX (slua391.htm, 8 KB)
02 Aug 2006 Abstract
Production 2: Data Flash Programing & Calibrating the bq20z70/90 (slua379.htm, 8 KB)
25 May 2006 Abstract
Evaluation 3: Theory/Implementation Impedance Track Battery Fuel-Gauging Algo (slua364.htm, 8 KB)
25 Nov 2005 Abstract
Design 2: Avoiding ESD and EMI Problems in bq20zxx Battery Pack Electronics (slua368.htm, 8 KB)
11 Nov 2005 Abstract
View Application Notes for Battery Fuel Gauges
Back to TopUser Guides
bq20z70EVM-001 SBS 1.1 ImpedanceTrack Tech Enabled Battery Mgmt Solution EVM (Rev. A) (sluu242a.pdf, 1143 KB)
15 Jun 2006 Download

Tools & Software
Back to Top Name Part # Company Tool / Software Type
BQ20Z70EVM Evaluation Module for 2nd Generation Impedance Track(TM)BQ20Z70EVM-001Texas InstrumentsDevelopment Boards/EVMs
BQMTESTER Multi Channel Test and Program BoardBQMTESTERTexas InstrumentsDevelopment Boards/EVMs
Single Channel TesterBQTESTERTexas InstrumentsDevelopment Boards/EVMs
Chemistry Updater Setup 1.13 (Rev. G) (sluc066g.zip, 1038 KB )
14 May 2008 zip
bq20z70-V101 Multiple Li-Ion Chemistries Software (sluc057.zip, 703 KB )
11 Jul 2006 zip