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UC3854 Status: ACTIVE

High Power Factor Preregulator


      
         
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Datasheet

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 UC1854 UC2854 UC3854
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 UC3854

Version Part Number Definition
Military UC1854 QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

  • UC3854A: Enhanced High Power Factor Preregulator
  • UC3854B: Enhanced High Power Factor Preregulator
  • TL431A: Adjustable Precision Shunt Regulator
  • TL431: Adjustable Precision Shunt Regulator

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
UC3854DWACTIVE0 to 701.30 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3854DWG4ACTIVE0 to 701.30 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3854DWTRACTIVE0 to 701.25 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3854DWTR-FG4ACTIVE0 to 701.15 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3854DWTRG4ACTIVE0 to 701.25 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3854NACTIVE0 to 701.30 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3854NG4ACTIVE0 to 701.30 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC3854QACTIVE0 to 701.50 | 1kuPLCC (FN) | 20 View 46 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3854QG3ACTIVE0 to 701.50 | 1kuPLCC (FN) | 20 View 46 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3854QTRACTIVE0 to 701.25 | 1kuPLCC (FN) | 20 View 1000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC3854QTRG3ACTIVE0 to 701.25 | 1kuPLCC (FN) | 20 View 1000 | 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 9:52 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC3854DW
AmericasArrow 250
AsiaWPI 34
TI Lead Time*: 20 WeeksUC3854DWG4
AsiaFarnell Asia 789
EuropeFarnell 598
TI Lead Time*: 20 WeeksUC3854DWTR
AmericasRochester Electronics 139
TI Lead Time*: 20 WeeksUC3854DWTR-FG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksUC3854DWTRG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksUC3854N
AmericasNewark 81
Rochester Electronics 944
AsiaFarnell Asia 269
WPI 86
EuropeArrow Northern Europe 325
Avnet-SILICA 550
Compel 20
Farnell 150
WorldwideMouser Electronics 66
TI Lead Time*: 20 WeeksUC3854NG4
AmericasNewark 730
Rochester Electronics 50
AsiaFarnell Asia 730
WorldwideMouser Electronics 225
TI Lead Time*: 12 WeeksUC3854Q
AmericasRochester Electronics >1k
WorldwideMouser Electronics 225
TI Lead Time*: 12 WeeksUC3854QG3
None Reported
View Distributors
TI Lead Time*: 1 WeekUC3854QTR
AmericasRochester Electronics >1k
TI Lead Time*: 1 WeekUC3854QTRG3
None Reported
View Distributors
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
UC3854DW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3854DWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3854DWTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3854DWTR-FG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3854DWTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC3854N RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC3854NG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC3854Q RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC3854QG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC3854QTR RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC3854QTRG3 RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView

* 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 UC3854 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
UC3854A Enhanced High Power Factor Preregulator AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UC3854B Enhanced High Power Factor Preregulator AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
TL431A Adjustable Precision Shunt Regulator VOLTAGE REFERENCE-SHUNT VOLTAGE REFERENCE TI customers also evaluated this product.
TL431 Adjustable Precision Shunt Regulator VOLTAGE REFERENCE-SHUNT VOLTAGE REFERENCE TI customers also evaluated this product.

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