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UC2854 Status: ACTIVE

High Power Factor Preregulator


      
         
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Datasheet

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 UC1854 UC2854UC3854 
UVLO Thresholds On/Off(V)16/10  16/10  16/10  
Operating Supply(Max)(V)30  30  30  
Startup Current(mA)1.5  1.5  1.5  
Operating Supply Current(mA)10  10  10  
Vref(V)7.5  7.5  7.5  
Vref tol(%)1.3  1.3  1.3  
Duty Cycle(Max)(%)95  95  95  
Practical Operating Frequency(Max)(MHz)0.2  0.2  0.2  
Pin/Package16CDIP  16PDIP, 16SOIC  16PDIP, 16SOIC, 20PLCC  
RatingMilitary  Catalog  Catalog  
 SamplesSamplesSamples
 InventoryInventoryInventory

Other qualified versions of UC2854

Version Part Number Definition
Military UC2854M QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

  • UC3854: High Power Factor Preregulator
  • TPS40054: Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source only

Product Information

Features

  • Control Boost PWM to 0.99 Power Factor
  • Limit Line Current Distortion To <5%
  • World-Wide Operation Without Switches
  • Feed-Forward Line Regulation
  • Average Current-Mode Control
  • Low Noise Sensitivity
  • Low Start-Up Supply Current
  • Fixed-Frequency PWM Drive
  • Low-Offset Analog Multiplier/Divider
  • 1A Totem-Pole Gate Driver
  • Precision Voltage Reference

Description

The UC1854 provides active power factor correction for power systems that otherwise would draw non-sinusoidal current from sinusoidal power lines. This device implements all the control functions necessary to build a power supply capable of optimally using available power-line current while minimizing line-current distortion. To do this, the UC1854 contains a voltage amplifier, an analog multiplier/divider, a current amplifier, and a fixed-frequency PWM. In addition, the UC1854 contains a power MOSFET compatible gate driver, 7.5V reference, line anticipator, load-enable comparator, low-supply detector, and over-current comparator.

The UC1854 uses average current-mode control to accomplish fixed-frequency current control with stability and low distortion.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC2854DWACTIVE-40 to 851.50 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2854DWG4ACTIVE-40 to 851.50 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2854DWTRACTIVE-40 to 851.50 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC2854DWTRG4ACTIVE-40 to 851.50 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC2854NACTIVE-40 to 851.50 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC2854NG4ACTIVE-40 to 851.50 | 1kuPDIP (N) | 16 View 25 | TUBE 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 9:54 AM GMT, 25 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC2854DW
AmericasArrow 138
Avnet 5
Newark 94
Rochester Electronics >1k
AsiaFarnell Asia 399
WPI 130
WorldwideDigiKey 188
TI Lead Time*: 20 WeeksUC2854DWG4
AsiaFarnell Asia 32
EuropeFarnell 32
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC2854DWTR
AmericasRochester Electronics >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC2854DWTRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksUC2854N
AmericasArrow 629
Newark 181
Rochester Electronics 502
AsiaFarnell Asia 87
EuropeFarnell 62
TI Lead Time*: 20 WeeksUC2854NG4
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
UC2854DW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854DWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854DWTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854DWTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854N RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC2854NG4 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.

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Technical Documents

Most useful technical documents for UC2854 Help

Datasheet

Application Notes

View Application Notes for Power Factor Correction ICs

Tools & Software

NamePart # Company Tool / Software Type
UCC28070 Evaluation moduleUCC28070EVMTexas InstrumentsDevelopment Boards/EVMs

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UC3854 High Power Factor Preregulator AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
TPS40054 Wide Input (8V-40V) up to 1MHz Frequency Synchronous Buck Controller, source only NON-ISOLATED SWITCHING DC/DC REGULATORS-DC/DC CONTROLLERS (EXTERNAL SWITCH) TI customers also evaluated this product.

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