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UCC3956 Status: ACTIVE

Switch-mode Lead-Acid Battery Charger with Differential Current Sense


      
         
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 UCC3956
# Series CellsMultiple  
Charge Current(Max)(A)>2  
Charge Status Outputs2  
Control TopologySwitchmode  
Switching Frequency(kHz)110  
Primary Charge Termination MethodMinimum Current  
Pin/Package20PDIP, 20SOIC  
Vin(Max)(V)20  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • UC2909: Switch-mode Lead-Acid Battery Charger with Differential Current Sense
  • BQ2031: Switch-mode Lead-Acid Battery Charger with User-Selectable Charge Algorithms
  • BQ24450: Integrated Charge Controller for Lead-Acid Batteries
  • TPS40210: Wide Input Range Current Mode Boost Controller

More Related Products

Product Information

Features

  • Precision 4.1 V Reference (1%)
  • High-Efficiency Battery Charger Solution
  • High-Side or Low-Side Switch-Mode Current-Sensing
  • Average-Current-Mode Control from Trickle to Overcharge
  • Resistor-Programmable Charge Currents
  • Internal State Logic Provides Four Charge States
  • Programmable Overcharge Time
  • CHG Pin Initiates Charging
  • Output-Status Bits Report Charge State

Description

The UCC3956 family of switch-mode lithium-ion battery-charger controllers accurately control lithium-ion battery charging with a highly-efficient average-current-control loop. This chip is designed to work as a stand-alone charger controller for a single-cell or multiple-cell battery pack. This chip combines charge-state logic and average-current PWM control circuitry with a 14-bit counter to program the overcharge time. The charge-state logic indicates current-or voltage-control depending on the charge state. The chip includes undervoltage lockout (UVLO) circuitry to ensure sufficient supply voltage is present before output switching starts. Additional circuit blocks include a differential-current-sense amplifier, a 1% voltage reference, voltage- and current-error amplifiers, PWM latch, charge-state decode bits, and a 500-mA output driver.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UCC3956DWACTIVE-20 to 702.55 | 1kuSOIC (DW) | 20 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC3956DWG4ACTIVE-20 to 702.55 | 1kuSOIC (DW) | 20 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC3956NACTIVE-20 to 702.55 | 1kuPDIP (N) | 20 View 20 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC3956NG4ACTIVE-20 to 702.55 | 1kuPDIP (N) | 20 View 20 | TUBE 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 9:48 AM GMT, 25 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUCC3956DW
AmericasRochester Electronics 97
AsiaWPI 55
WorldwideDigiKey 50
TI Lead Time*: 20 WeeksUCC3956DWG4
WorldwideDigiKey  Available
TI Lead Time*: 14 WeeksUCC3956N
AmericasNewark 140
Rochester Electronics >1k
WorldwideDigiKey 271
Mouser Electronics 140
TI Lead Time*: 14 WeeksUCC3956NG4
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
UCC3956DW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC3956DWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC3956N RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UCC3956NG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView

* 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 UCC3956 Help

Datasheet

Application Notes

View Application Notes for Battery Charge Management

Tools & Software

NamePart # Company Tool / Software Type
Quick Search Selection Tool for Battery ChargersBATTERY_CHARGERS_SELECTION_TOOLTexas InstrumentsFree Evaluation Tools

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UC2909 Switch-mode Lead-Acid Battery Charger with Differential Current Sense BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ2031 Switch-mode Lead-Acid Battery Charger with User-Selectable Charge Algorithms BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24450 Integrated Charge Controller for Lead-Acid Batteries BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
UC3909 Switch-mode Lead-Acid Battery Charger with Differential Current Sense BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
UC3906 Linear Lead-Acid Battery Charger BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24702 Multi-Chemistry Battery Charge Controller and System Power Selector BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24703 Multi-Chemistry Battery Charge Controller and System Power Selector BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
BQ24105 Standalone Synchronous Switch-Mode Li-Ion Charger w/2A FET in QFN-20, 1 to 3 Cells BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
UC2906 Linear Lead-Acid Battery Charger BATTERY MANAGEMENT-BATTERY CHARGE MANAGEMENT TI customers also evaluated this product.
TPS40210 Wide Input Range Current Mode Boost Controller NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.

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