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UCC28521 Status: ACTIVE

Advanced PWM/PFC Combination Controller with TEM/TEM Modulation


      
         
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 UCC28521
UVLO Thresholds On/Off(V)10.2/9.7  
Operating Supply(Max)(V)18  
Startup Current(mA)0.1  
Operating Supply Current(mA)4  
Practical Operating Frequency(Max)(MHz)0.5  
Pin/Package20SOIC  
RatingCatalog  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • UCC28070: Two-Phase Interleaved CCM PFC Controller
  • UCC28061: Natural Interleaving(TM) Transition-Mode PFC Controller with Improved Audible Noise Immunity
  • UCC28019A: 8-Pin Continuous Conduction Mode (CCM) PFC Controller

More Related Products

Product Information

Features

  • Provides Control of PFC and PWM Power Stages In One Device
  • Trailing-Edge PFC, Trailing-Edge PWM Modulation
  • Built-In Sequencing of PFC and PWM Turn-On
  • 2-A Source and 3-A Sink Gate Drive for Both PFC and PWM Stages
  • Typical 16-ns Rise Time and 7-ns Fall Time into 1-nF Loads
  • PFC Features
    • Average-Current-Mode Control for Continuous Conduction Mode Operation
    • Highly-Linear Multiplier for Near-Unity Power Factor
    • Input Voltage Feedforward Implementation
    • Improved Load Transient Response
    • Accurate Power Limiting
    • Zero Power Detect
  • PWM Features
    • Peak-Current-Mode Control Operation
    • 1:1 PFC:PWM Frequency Option
    • Programmable maximum Duty Cycle Limit Up to 90%
    • Programmable Soft-Start
  • APPLICATIONS
    • High-Efficiency Server and Desktop Supplies
    • High-Efficiency Telecom AC-DC Converter

View All Features in Datasheet

Description

The UCC28521 and UCC28528 combination PFC/PWM controllers provide complete control functionality for any off-line power system requiring compliance with the IEC1000-3-2 harmonic reduction requirements. By combining the control and drive signals for the PFC and the PWM stages into a single device, significant performance and cost benefits are gained.

Based on the UCC28511, the new devices employ an average current mode control architecture with input voltage feedforward. The major difference of the UCC28521/28 is the trailing-edge / trailing-edge (TEM/TEM) modulation scheme for the PFC/PWM stages. The UCC28528 differs from the UCC28521 as its PWM stage does not turn off with the falling bulk voltage. The UCC28528 PWM was designed for low power auxiliary supplies.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UCC28521DWACTIVE-40 to 852.30 | 1kuSOIC (DW) | 20 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC28521DWG4ACTIVE-40 to 852.30 | 1kuSOIC (DW) | 20 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UCC28521DWRACTIVE-40 to 852.30 | 1kuSOIC (DW) | 20 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UCC28521DWRG4ACTIVE-40 to 852.30 | 1kuSOIC (DW) | 20 View 2000 | 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

Reported Distributor Inventory as of 9:50 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUCC28521DW
AmericasRochester Electronics 75
AsiaWPI 100
WorldwideDigiKey 104
TI Lead Time*: 20 WeeksUCC28521DWG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC28521DWR
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUCC28521DWRG4
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
UCC28521DW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28521DWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28521DWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
UCC28521DWRG4 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 UCC28521 Help

Datasheet

Application Notes

View Application Notes for Power Factor Correction ICs

User Guides

View User Guides for Power Factor Correction ICs

Tools & Software

NamePart # Company Tool / Software Type
UCC28521 Evaluation ModuleUCC28521EVMTexas InstrumentsDevelopment Boards/EVMs
UCC28528 Evaluation ModuleUCC28528EVMTexas InstrumentsDevelopment Boards/EVMs

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UCC28070 Two-Phase Interleaved CCM PFC Controller AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC28061 Natural Interleaving(TM) Transition-Mode PFC Controller with Improved Audible Noise Immunity AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC28019A 8-Pin Continuous Conduction Mode (CCM) PFC Controller AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC38051 PFC Controller for low to medium power applications requiring compliance with IEC 1000-3-2 AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC28528 Advanced PWM/PFC Combination Controller with TEM/TEM Modulation AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC28060 Natural Interleaved Dual-Phase Transition-Mode PFC Controller AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UC3854 High Power Factor Preregulator AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC28019 8-Pin Continuous Conduction Mode (CCM) PFC Controller AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC28517 Advanced PFC/PWM Combination Controllers AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UC2853A High Power Factor Preregulator AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.

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