BQ2085-V1P3 Status: ACTIVE

SBS-Compliant Gas Gauge IC For Use With The bq29311


      
         
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 BQ2085-V1P3
Battery Capacity(Min)(mAh)500  
Battery Capacity(Max)(mAh)15000  
Communication InterfaceSMBus  
Capacity IndicationLED  
Pin/Package38TSSOP  
Approx. Price (US$) 4.60 | 1ku  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • BQ78PL114: PowerLAN Gateway Battery Management Controller with PowerPump Cell Balancing
  • BQ2084-V150: SBS v1.1 Compliant Gas Gauge with LED Delay
  • BQ2084-V143: SBS v1.1 Compliant Gas Gauge for use with the BQ29312A
  • BQ29311: 3-, 4-Cell Lithium-Ion Protection IC for Use With BQ2083/5
  • BQ29412: Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.45V)
  • PTH08T220W: 16-A, 4.5-V to 14-V Input, Non-Isolated, Wide Output Adjust, Power Module w/ TurboTrans

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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
  • Works With the TI bq29311 Analog Front-End (AFE) Protection IC to Provide Complete Pack Electronics for 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
  • Measures Charge Flow Using a High Resolution 16-Bit Integrating Converter
    • Better Than 3-nVh of Resolution
    • Self-Calibrating
    • Offset Error Less Than 1 µV
  • Uses 16-Bit Delta Sigma Converter for Accurate Voltage and Temperature Measurements
  • Programmable Cell Modeling for Maximum Battery Fuel Gauge Accuracy
  • Drives 3-, 4-, or 5-Segment LED Display for Remaining Capacity Indication
  • 38-Pin TSSOP (DBT)
  • APPLICATIONS
    • Notebook PCs
    • Medical and Test Equipment
    • Portable Instrumentation

Description

The bq2085-V1P3 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 bq2085-V1P3 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 bq29311 analog front-end (AFE) protection IC to maximize functionality and safety and minimize component count and cost in smart battery circuits. Using information from the bq2085-V1P3, the host controller can manage remaining battery power to extend the system run time as much as possible.

The bq2085-V1P3 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 3-nVh and an offset measurement error of less than 1-µV (typical). For voltage and temperature reporting, the bq2085-V1P3 uses a 16-bit A-to-D converter. In conjunction with the bq29311, the onboard ADC also monitors individual cell voltages in a battery pack and allows the bq2085-V1P3 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 bq2085-V1P3 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 bq2085-V1P3 provides LED drivers and a push-button 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 bq2085-V1P3 contains 512 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 bq2085-V1P3 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 bq29311 AFE protection IC provides power to the bq2085-V1P3 from a 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
BQ2085DBT-V1P3ACTIVE-20 to 855.05 | 1kuTSSOP (DBT) | 38 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ2085DBT-V1P3G4ACTIVE-20 to 855.05 | 1kuTSSOP (DBT) | 38 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ2085DBTR-V1P3ACTIVE-20 to 854.60 | 1kuTSSOP (DBT) | 38 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ2085DBTR-V1P3G4ACTIVE-20 to 854.60 | 1kuTSSOP (DBT) | 38 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

Reported Distributor Inventory as of 12:08 PM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 4 WeeksBQ2085DBT-V1P3
AmericasAvnet 36
AsiaWPI 87
WorldwideDigiKey 230
TI Lead Time*: 4 WeeksBQ2085DBT-V1P3G4
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksBQ2085DBTR-V1P3
WorldwideDigiKey  Available
TI Lead Time*: 4 WeeksBQ2085DBTR-V1P3G4
AsiaWPI >1k
WorldwideDigiKey  Available
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
BQ2085DBT-V1P3 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2085DBT-V1P3G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2085DBTR-V1P3 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ2085DBTR-V1P3G4 RoHS Compliant 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 BQ2085-V1P3 Help

Datasheet

Application Notes

Tools & Software

NamePart # CompanySoftware/Tool Type

Customers Who Evaluated This Product Also Evaluated...
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