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BQ29414 Status: ACTIVE

Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.55V)


      
         
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 BQ29410 BQ29411 BQ29412 BQ29413 BQ29414BQ29415 BQ29419 
Cells Protected2, 3, 4  2, 3, 4  2, 3, 4  2, 3, 4  2, 3, 4  2, 3, 4  2, 3, 4  
Overvoltage Threshold(V)4.35  4.40  4.45  4.5  4.55  4.6  4.30  
Protection FETsExternal  External  External  External  External  External  External  
Shutdown Current(uA)2  2  2  2  2  2  2  
Pin/Package8SM8, 8TSSOP  8SM8, 8TSSOP  8SM8, 8TSSOP  8SM8, 8TSSOP  8SM8, 8TSSOP  8SM8, 8TSSOP  8TSSOP  
Approx. Price (US$) 0.45 | 1ku   0.45 | 1ku   0.45 | 1ku   0.45 | 1ku   0.45 | 1ku   0.45 | 1ku   0.45 | 1ku  
 SamplesSamplesSamplesSamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • BQ29415: Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.60V)
  • BQ29412: Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.45V)

Product Information

Features

  • 2-, 3-, or 4-Cell SecondaryProtection
  • Low Power Consumption ICC < 2 µA [VCELL(ALL) < V(PROTECT)]
  • Fixed High Accuracy Overvoltage Protection Threshold
    • bq29410 = 4.35 V
    • bq29411 = 4.40 V
    • bq29412 = 4.45 V
    • bq29413 = 4.50 V
    • bq29414 = 4.55 V
    • bq29415 = 4.60 V
    • bq29419 = 4.30 V
  • Programmable Delay Time of Detection
  • High Power Supply Ripple Rejection
  • Stable During Pulse Charge Operation
  • APPLICATIONS
    • 2nd-Level Overvoltage Protection in Li-Ion Battery Packs in:
      • Notebook Computers
      • Portable Instrumentation
      • Portable Equipment

Description

The bq2941x is a secondary overvoltage protection IC for 2-, 3-, or 4-cell lithium-ion battery packs that incorporates a high-accuracy precision overvoltage detection circuit. It includes a programmable delay circuit for overvoltage detection time.

FUNCTION

Each cell in a multiple-cell pack is compared to an internal reference voltage. If one cell reaches an overvoltage condition, the protection sequence begins. The bq2941x device starts charging an external capacitor through the CD pin. When the CD pin voltage reaches 1.2 V, the OUT pin changes from a low level to a high level.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
BQ29414DCTRACTIVE-40 to 1100.45 | 1kuSM8 (DCT) | 8  3000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ29414DCTRG4ACTIVE-40 to 1100.45 | 1kuSM8 (DCT) | 8  3000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ29414DCTTACTIVE-40 to 1100.50 | 1kuSM8 (DCT) | 8  250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ29414DCTTG4ACTIVE-40 to 1100.50 | 1kuSM8 (DCT) | 8  250 | SMALL T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ29414PWACTIVE-40 to 1100.50 | 1kuTSSOP (PW) | 8 View 150 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ29414PWG4ACTIVE-40 to 1100.50 | 1kuTSSOP (PW) | 8 View 150 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
BQ29414PWRACTIVE-40 to 1100.45 | 1kuTSSOP (PW) | 8 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint
BQ29414PWRG4ACTIVE-40 to 1100.45 | 1kuTSSOP (PW) | 8 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this Footprint

* 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 12:12 PM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksBQ29414DCTR
AmericasRochester Electronics >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 20 WeeksBQ29414DCTRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ29414DCTT
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ29414DCTTG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ29414PW
AsiaFarnell Asia 600
EuropeFarnell 600
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ29414PWG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksBQ29414PWR
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 20 WeeksBQ29414PWRG4
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
BQ29414DCTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ29414DCTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ29414DCTT RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ29414DCTTG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
BQ29414PW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ29414PWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ29414PWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
BQ29414PWRG4 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 BQ29414 Help

Datasheet

Application Notes

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
BQ29415 Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.60V) BATTERY MANAGEMENT-LITHIUM ION PROTECTION TI customers also evaluated this product.
BQ29412 Secondary Over-Voltage Protection for 2-4 cell in series Li-Ion/Poly (4.45V) BATTERY MANAGEMENT-LITHIUM ION PROTECTION TI customers also evaluated this product.

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