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UCC3581 Status: ACTIVE

Micropower Voltage Mode PWM


      
         
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Datasheet

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 UCC2581 UCC3581
TopologyBoost, Flyback, Forward  Boost, Buck, Flyback, Forward  
Control MethodVoltage Mode  Voltage Mode  
Duty Cycle(Max)(%)83  83  
PWM Outputs(#)1  1  
Frequency(Max)(kHz)100  100  
UVLO Thresholds On/Off(V)7.3/6.8  7.3/6.8  
Pin/Package14SOIC  14PDIP, 14SOIC  
Regulated Outputs(#)1  1  
 SamplesSamples
 InventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • UCC2581: Micropower Voltage Mode PWM
  • UCC3889: Off-Line Power Supply Controller
  • TL494: PWM Control Circuit

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Product Information

Features

  • Low 85µA Startup Current
  • Low 300µA Operating Current
  • Automatically Disabled Startup Preregulator
  • Programmable Minimum Duty Cycle with Cycle Skipping
  • Programmable Maximum Duty Cycle
  • Output Current 1A Peak Source and Sink
  • Programmable Soft Start
  • Programmable Oscillator Frequency
  • External Oscillator Synchronization Capability

Description

The UCC3581 voltage mode pulse width modulator is designed to control low power isolated DC - DC converters in applications such as Subscriber Line Power (ISDN I.430). Primarily used for single switch forward and flyback converters, the UCC3581 features BiCMOS circuitry for low startup and operating current, while maintaining the ability to drive power MOSFETs at frequencies up to 100kHz. The UCC3581 oscillator allows the flexibility to program both the frequency and the maximum duty cycle with two resistors and a capacitor. A TTL level input is also provided to allow synchronization to an external frequency source.

The UCC3581 includes programmable soft start circuitry, overcurrent detection, a 7.5V linear preregulator to control chip VDD during startup, and an on-board 4.

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Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UCC3581DACTIVE0 to 701.40 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC3581DG4ACTIVE0 to 701.40 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC3581DTRACTIVE0 to 701.35 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC3581DTRG4ACTIVE0 to 701.35 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC3581NACTIVE0 to 701.40 | 1kuPDIP (N) | 14 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC3581NG4ACTIVE0 to 701.40 | 1kuPDIP (N) | 14 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC3581QOBSOLETE0 to 70 UTR | 0     Not 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 9:49 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUCC3581D
AmericasAvnet 240
Newark 239
AsiaWPI 151
WorldwideDigiKey 116
Mouser Electronics 220
TI Lead Time*: 20 WeeksUCC3581DG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC3581DTR
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC3581DTRG4
WorldwideDigiKey  Available
TI Lead Time*: 14 WeeksUCC3581N
AmericasAvnet 15
Rochester Electronics 175
EuropeAvnet-SILICA 125
WorldwideMouser Electronics 198
TI Lead Time*: 14 WeeksUCC3581NG4
None Reported
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** 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
UCC3581D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC3581DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC3581DTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC3581DTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UCC3581N RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UCC3581NG4 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 UCC3581 Help

Datasheet

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UCC2581 Micropower Voltage Mode PWM AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC3889 Off-Line Power Supply Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TL494 PWM Control Circuit AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC35705 High Speed Voltage Mode Pulse Width Modulator AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC35701 Advanced Voltage Mode Pulse Width Modulator AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC3895 BiCMOS Advanced Phase Shift PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC35706 High Speed Voltage Mode Pulse Width Modulator AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC28600 8-Pin Quasi Resonant Flyback Green Mode Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.

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