TI Home > Semiconductors > Power Management > Battery Management > Battery Fuel Gauges >

BQ2084 Status: NRND

SBS Compliant Gas Gauge For Use With The bq29312


      
         
Alert me about changes<br/>to this product

Alert Icon   NRND: This product is not recommended for new designs. However, the device, tool, or software continues to be in production to support existing customers. TI does not recommend using this part in a new design. TI encourages designers to consider alternative products for new designs.

Replaced By:

  • BQ2084-V140 The device has the SAME FUNCTIONALITY and PINOUT as the compared device but is NOT an exact equivalent. 

Product Information

Features

  • Provides Accurate Measurement of Available Charge in Li-Ion and Li-Polymer Batteries
  • Supports the Smart Battery Specification (SBS) V1.1
  • Integrated Time Base Removes Need for External Crystal with Optional Crystal input
  • Works With the TI bq29312 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics for 7.2-V, 10.8-V or 14.4-V Battery Packs With Few External Components
  • Based on a Powerful Low-Power RISC CPU Core With High-Performance Peripherals
  • Integrated Flash Memory Eliminates the Need for External Configuration EEPROM
  • Uses 16-Bit Delta Sigma Converter for Accurate Voltage and Temperature Measurements
  • Measures Charge Flow Using a High Resolution 16-Bit Integrating Converter
    • Better Than 0.65-nVh of Resolution
    • Self-Calibrating
    • Offset Error Less Than 1-µV
  • Programmable Cell Modeling for Maximum Battery Fuel Gauge Accuracy
  • Drives 3-, 4-, or 5-Segment LED Display for Remaining Capacity Indication
  • Available in a 38-Pin TSSOP (DBT) Package
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

Description

The bq2084-V143 SBS-compliant gas gauge IC for battery pack or in-system installation maintains an accurate record of available charge in Li-ion or Li-polymer batteries. The bq2084-V143 monitors capacity 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 bq29312 AFE protection IC to maximize functionality and safety and minimize component count and cost in smart battery circuits. Using information from the bq2084-V143, the host controller can manage remaining battery power to extend the system run time as much as possible.

The bq2084-V143 uses an integrating converter with continuous sampling for the measurement of battery charge and discharge currents. Optimized for coulomb counting in portable applications, the self-calibrating integrating converter has a resolution better than 0.65-nVh and an offset measurement error of less than 1-µV (typical). For voltage and temperature reporting, the bq2084-V143 uses a 16-bit A-to-D converter. With the bq29312, the onboard ADC also monitors the pack and individual cell voltages in a battery pack and allows the bq2084-V143 to generate the control signals necessary to implement the cell balancing and the required safety protection for Li-ion and Li-polymer battery chemistries.

The bq2084-V143 supports the Smart Battery Data (SBData) commands and charge-control functions. It communicates data using the System Management Bus (SMBus) 2-wire protocol. The data available include the battery's remaining capacity, temperature, voltage, current, and remaining run-time predictions.

The bq2084-V143 provides LED drivers and a pushbutton input to depict remaining battery capacity from full to empty in 20%, 25%, or 33% increments with a 3-, 4-, or 5-segment display.

The bq2084-V143 contains 1k bytes of internal data flash memory, which store configuration information. The information includes nominal capacity and voltage, self-discharge rate, rate compensation factors, and other programmable cell-modeling factors used to accurately adjust remaining capacity for use-conditions based on time, rate, and temperature. The bq2084-V143 also automatically calibrates or learns the true battery capacity in the course of a discharge cycle from programmable near full to near empty levels.

The bq29312 analog front-end (AFE) protection IC is used to maximize functionality and safety and minimize component count and cost in smart battery circuits. The bq29312 AFE protection IC provides power to the bq2084-V143 from a 2-, 3-, or 4-series Li-ion cell stack, eliminating the need for an external regulator circuit.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
BQ2084DBTNRND-25 to 856.05 | 1kuTSSOP (DBT) | 38 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
BQ2084DBT-V141PREVIEW-25 to 85 TSSOP (DBT) | 38 View    Not Available
BQ2084DBTG4NRND-25 to 856.05 | 1kuTSSOP (DBT) | 38 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
BQ2084DBTRNRND-25 to 855.50 | 1kuTSSOP (DBT) | 38 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available
BQ2084DBTR-V141PREVIEW-25 to 85 TSSOP (DBT) | 38 View    Not Available
BQ2084DBTRG4NRND-25 to 855.50 | 1kuTSSOP (DBT) | 38 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintNot Available

* 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

Reported Distributor Inventory as of 12:08 PM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksBQ2084DBT
AmericasRochester Electronics >1k
TI Lead Time*: 4 WeeksBQ2084DBT-V141
AmericasRochester Electronics 450
TI Lead Time*: 20 WeeksBQ2084DBTG4
AsiaFarnell Asia 2
EuropeFarnell 1
TI Lead Time*: 20 WeeksBQ2084DBTR
AmericasRochester Electronics >1k
TI Lead Time*: 4 WeeksBQ2084DBTR-V141
None Reported
View Distributors
TI Lead Time*: 20 WeeksBQ2084DBTRG4
None Reported
View Distributors
View all Distributors  

** 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

 Product ContentDPPM / MTBF / FIT Rate
DeviceEco Plan* Lead / Ball FinishMSL Rating / Peak ReflowDetailsDetails
BQ2084DBT  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2084DBT-V141 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2084DBTG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2084DBTR  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2084DBTR-V141 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2084DBTRG4  Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView

* 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

Most useful technical documents for BQ2084 Help

Datasheet

Application Notes

View Application Notes for Battery Fuel Gauges

Tools & Software

NamePart # Company Tool / Software Type
BQ2084EVM-001 Gas Gauge Evaluation System for LiIon LiPoly battery packsBQ2084EVM-001Texas InstrumentsDevelopment Boards/EVMs
bq2084 Evaluation Software for WindowsEV2300-084 Texas Instruments Application Software 

Support and Community

Customer Tags Help

No Tags are Available for this Part Number

Other Support



Click Here