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UCC2893 Status: ACTIVE

Current Mode Active Clamp PWM Controller


      
         
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Datasheet

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Functional Block Diagram


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 UCC2891 UCC2892 UCC2893UCC2894 
TopologyFlyback, Forward  Flyback, Forward  Flyback, Forward  Flyback, Forward  
Control MethodCurrent Mode  Current Mode  Current Mode  Current Mode  
PWM Outputs(#)1  1  1  1  
Frequency(Max)(kHz)1000  1000  1000  1000  
UVLO Thresholds On/Off(V)13.0/8.0  13.0/8.0  13.0/8.0  13.0/8.0  
Pin/Package16SOIC, 16TSSOP  16SOIC, 16TSSOP  16SOIC, 16TSSOP  16SOIC, 16TSSOP  
Regulated Outputs(#)1  1  1  1  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • UCC28C42: BiCMOS Low Current 8 Pin PWM Current Mode Controller
  • UCC2891: Current Mode Active Clamp PWM Controller
  • UCC28C45: BiCMOS Low-Power Current Mode PWM Controller
  • TPS54231: 2A, 28V Input, 570 kHz Step Down SWIFT™ DC/DC Converter with Eco-Mode ™
  • UCC37323: Dual 4 A Peak High Speed Low-Side Power MOSFET Drivers
  • TPS28225: 8-Pin High Frequency 4-Amp Sink Synchronous MOSFET Driver

Product Information

Features

  • Low Output Jitter
  • Soft-Stop Shutdown of MAIN and AUX
  • Ideal for Active Clamp/Reset Forward, Flyback Converters
  • Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
  • Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
  • 110-V Input Startup Regulator on UCC2891/3
  • TrueDrive™ 2-A Sink, 2-A Source Outputs
  • Accurate Line UV and Line OV Threshold
  • Programmable Slope Compensation
  • 1.0-MHz Synchronizable Oscillator
  • Precise Programmable Maximum Duty Cycle
  • Programmable Soft Start
  • APPLICATIONS
    • 150-W to 700-W SMPS
    • High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
    • Server, 48-V Telecom, Datacom
    • High Power Adapter, LCD-TV and PDP-TV

Description

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UCC2893DACTIVE-40 to 851.45 | 1kuSOIC (D) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC2893DG4ACTIVE-40 to 851.45 | 1kuSOIC (D) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC2893DRACTIVE-40 to 851.45 | 1kuSOIC (D) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC2893DRG4ACTIVE-40 to 851.45 | 1kuSOIC (D) | 16 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC2893PWACTIVE-40 to 1051.45 | 1kuTSSOP (PW) | 16 View 90 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC2893PWG4ACTIVE-40 to 1051.45 | 1kuTSSOP (PW) | 16 View 90 | 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 9:50 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUCC2893D
AmericasRochester Electronics >1k
AsiaWPI 51
EuropeSpoerle 240
WorldwideDigiKey 156
TI Lead Time*: 20 WeeksUCC2893DG4
WorldwideDigiKey  Available
Mouser Electronics 175
TI Lead Time*: 20 WeeksUCC2893DR
AsiaWPI >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC2893DRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC2893PW
AmericasRochester Electronics 450
AsiaWPI 95
TI Lead Time*: 20 WeeksUCC2893PWG4
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
UCC2893D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC2893DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC2893DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC2893DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC2893PW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC2893PWG4 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 UCC2893 Help

Datasheet

Application Notes

View Application Notes for PWM Power Supply Controllers

Tools & Software

NamePart # Company Tool / Software Type
UCC2891 Evaluation ModuleUCC2891EVMTexas InstrumentsDevelopment Boards/EVMs

Simulation Models

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UCC28C42 BiCMOS Low Current 8 Pin PWM Current Mode Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC2891 Current Mode Active Clamp PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC28C45 BiCMOS Low-Power Current Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TPS54231 2A, 28V Input, 570 kHz Step Down SWIFT™ DC/DC Converter with Eco-Mode ™ DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
UCC37323 Dual 4 A Peak High Speed Low-Side Power MOSFET Drivers AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS TI customers also evaluated this product.
TPS28225 8-Pin High Frequency 4-Amp Sink Synchronous MOSFET Driver AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS TI customers also evaluated this product.
TPS40193 4.5V to 18V Input, Low Pin Count Synchronous Buck Controller with Power Good NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.
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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.
TPS54620 4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter DC/DC CONVERTERS (INTEGRATED SWITCH)-STEP-DOWN REGULATORS TI customers also evaluated this product.
UCC27200 120V Boot, 3-A Peak, High Frequency, High-Side/Low-Side Driver AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS TI customers also evaluated this product.
UCC37324 Dual 4 A Peak High Speed Low-Side Power MOSFET Drivers AC/DC AND DC/DC POWER SUPPLIES-MOSFET DRIVERS TI customers also evaluated this product.
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