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BQ2031 Status: ACTIVE

Switch-mode Lead-Acid Battery Charger with User-Selectable Charge Algorithms

      
         
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Datasheet

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 BQ2031
# Series CellsMultiple  
Charge Current(Max)(A)>2  
Charge Status Outputs3  
Control TopologySwitchmode  
Switching Frequency(kHz)100  
Primary Charge Termination MethodMaximum Voltage, (-)d2V, Minimum Current  
Pin/Package16PDIP, 16SOIC  
Vin(Max)(V)7  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • UC3906: Linear Lead-Acid Battery Charger
  • UC3909: Switch-mode Lead-Acid Battery Charger with Differential Current Sense
  • BQ24105: Standalone Synchronous Switch-Mode Li-Ion Charger w/2A FET in QFN-20, 1 to 3 Cells
  • TPS54350: 4.5 to 20V, 3A Synchronous Step Down SWIFT™ Converter
  • TPS2062: Dual 1A Current-Limited, Power-Distribution Switches
  • PTN78000W: 1.5-A, Wide-Input Adjustable Switching Regulator

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Product Information

Features

  • Conforms to battery manufacturers' charge recommendations for cyclic and float charge
  • Pin-selectable charge algorithms

    • - Two-Step Voltage with temperature-compensated constant-voltage maintenance
    - Two-Step Current with constant-rate pulsed current maintenance
    - Pulsed Current: hysteretic, on-demand pulsed current
  • Pin-selectable charge termination by maximum voltage, 2V, minimum current, and maximum time
  • Pre-charge qualification detects shorted, opened, or damaged cells and conditions battery
  • Charging continuously qualified by temperature and voltage limits
  • Internal temperature-compensated voltage reference
  • Pulse-width modulation control

    • - Ideal for high-efficiency switch-mode power conversion
    - Configurable for linear or gated current use
  • Direct LED control outputs display charge status and fault conditions

Description

The bq2031 Lead-Acid Fast Charge IC is designed to optimize charging of lead-acid chemistry batteries. A flexible pulse-width modulation regulator allows the bq2031 to control constant-voltage, constant-current, or pulsed-current charging. The regulator frequency is set by an external capacitor for design flexibility. The switch-mode design keeps power dissipation to a minimum for high charge current applications.

A charge cycle begins when power is applied or the battery is replaced. For safety, charging is inhibited until the battery voltage is within configured limits. If the battery voltage is less than the low-voltage threshold, the bq2031 provides trickle-currentcharging until the voltage rises into the allowed range or an internal timer runs out and places the bq2031 in a Fault condition. This procedure prevents high-current charging of cells that are possibly damaged or reversed. Charging is inhibited anytime the temperature of the battery is outside the configurable, allowed range. All voltage thresholds are temperature-compensated.

The bq2031 terminates fast (bulk) charging based on the following:

  • Maximum voltage
  • Second difference of cell voltage (2V)
  • Minimum current (in constant-voltage charging)
  • Maximum time-out (MTO)
    • After bulk charging, the bq2031 provides temperature-compensated maintenance (float) charging to maintain battery capacity.

    		    

    Pricing / Packaging / CAD Design Tools / Samples

    PricePackagingCAD Design ToolsSamples
    DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
    BQ2031PN-A5ACTIVE-20 to 702.80 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
    BQ2031PN-A5E4ACTIVE-20 to 702.80 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
    BQ2031SN-A5ACTIVE-20 to 703.10 | 1kuSOIC (D) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
    BQ2031SN-A5G4ACTIVE-20 to 703.10 | 1kuSOIC (D) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
    BQ2031SN-A5TRACTIVE-20 to 702.80 | 1kuSOIC (D) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    BQ2031SN-A5TRG4ACTIVE-20 to 702.80 | 1kuSOIC (D) | 16 View 2500 | 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

      TI Inventory Status Reported Distributor Inventory
    BQ2031PN-A5As of 12:05 PM GMT, 03 Jul 2009As of 12:05 PM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     4 Weeks AmericasDigiKey 165
     Mouser Electronics 100
     Newark 74
     Rochester Electronics 6
     AsiaWPI 61
     EuropeSpoerle 75
    BQ2031PN-A5E4As of 12:05 PM GMT, 03 Jul 2009As of 12:05 PM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     4 WeeksNone Reported
    View Distributors    		   
    BQ2031SN-A5As of 12:05 PM GMT, 03 Jul 2009As of 12:05 PM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     8 Weeks AmericasAvnet 968
     DigiKey >1k
     Mouser Electronics 187
     Newark 539
     EuropeAvnet-SILICA 50
    BQ2031SN-A5G4As of 12:05 PM GMT, 03 Jul 2009As of 12:05 PM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     8 Weeks AmericasDigiKey  Available
    BQ2031SN-A5TRAs of 12:05 PM GMT, 03 Jul 2009As of 12:05 PM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     8 Weeks AmericasArrow >1k
     DigiKey  Available
    BQ2031SN-A5TRG4As of 12:05 PM GMT, 03 Jul 2009As of 12:05 PM GMT, 03 Jul 2009
     Lead TimeRegionCompanyIn StockPurchase
     8 Weeks AmericasDigiKey  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
    BQ2031PN-A5 RoHS Compliant Pb-Free (RoHS) CU NIPDAU N/A for Pkg TypeViewView
    BQ2031PN-A5E4 RoHS Compliant Pb-Free (RoHS) CU NIPDAU N/A for Pkg TypeViewView
    BQ2031SN-A5 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    BQ2031SN-A5G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    BQ2031SN-A5TR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    BQ2031SN-A5TRG4 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

    Most useful technical documents for BQ2031 Help

    Datasheet

    Application Notes

    View Application Notes for Battery Charge Management

    User Guides

    View User Guides for Battery Charge Management

    Tools & Software

    NamePart # Company Tool / Software Type
    Temp Sense Designer SoftwareTEMPSENSE-SWTexas InstrumentsAnalysis Software
    Evaluation Module for Lead Acid, switchmode BQ2031DV2031S2Texas InstrumentsDevelopment Boards/EVMs
    Quick Search Selection Tool for Battery ChargersBATTERY_CHARGERS_SELECTION_TOOLTexas InstrumentsFree Evaluation Tools

    Customers Who Evaluated This Product Also Evaluated...
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    UC2906 Linear Lead-Acid Battery Charger   TI customers also evaluated this product.
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