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UC2854B Status: ACTIVE

Enhanced High Power Factor Preregulator


      
         
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Datasheet

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 UC1854B UC2854BUC3854B 
UVLO Thresholds On/Off(V)10.5/10  10.5/10  10.5/10  
Operating Supply(Max)(V)20  20  20  
Startup Current(mA)0.25  0.25  0.25  
Operating Supply Current(mA)12  12  12  
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, 20PLCC  16PDIP, 16SOIC  
RatingMilitary  Catalog  Catalog  
 SamplesSamplesSamples
 InventoryInventoryInventory

Other qualified versions of UC2854B

Version Part Number Definition
Enhanced Product UC2854B-EP Supports Defense, Aerospace and Medical Applications
Military UC2854BM QML certified for Military and Defense Applications

Customers Who Evaluated This Product Also Evaluated

  • UCC28061: Natural Interleaving(TM) Transition-Mode PFC Controller with Improved Audible Noise Immunity
  • UC3854B: Enhanced High Power Factor Preregulator
  • UCC28070: Two-Phase Interleaved CCM PFC Controller
  • UC2875: Phase Shift Resonant Controller
  • LP2985A-50: Single Output LDO, 150mA, Fixed(5.0V), 1.0% Tolerance, Low Quiescent Current, Low Noise
  • UCC2895: BiCMOS Advanced Phase Shift Resonant Controller

More Related Products

Product Information

Features

  • Controls Boost PWM to Near-Unity Power Factor
  • Limits Line Current Distortion To <3%
  • World-Wide Operation Without Switches
  • Accurate Power Limiting
  • Fixed-Frequency Average Current-Mode Control
  • High Bandwidth (5 MHz), Low-Offset Current Amplifier
  • Integrated Current- and Voltage-Amplifier Output Clamps
  • Multiplier Improvements: Linearity, 500 mV VAC Offset (Eliminates External Resistor), 0 V to 5 V Multout Common-Mode Range
  • VREF GOOD Comparator
  • Faster and Improved Accuracy ENABLE Comparator
  • UVLO Options (16 V/10 V or 10.5 V/10 V)
  • 300-µA Start-Up Supply Current

Description

The UC3854A/B products are pin compatibleenhanced versions of the UC3854. Like the UC3854, these products provide all of the functions necessary for active power factor corrected preregulators. The controller achieves near unity power factor by shaping the ac input line current waveform to correspond to the ac input line voltage. To do this the UC3854A/B uses average current mode control. Average current mode control maintains stable, low distortion sinusoidal line current without the need for slope compensation, unlike peak current mode control.

A 1%, 7.5-V reference, fixed frequency oscillator, PWM, voltage amplifierwith soft-start, line voltage feedforward (VRMS squarer), input supply voltage clamp, and over current comparator round out the lilst of feataures.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC2854BDWACTIVE-40 to 851.70 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2854BDWG4ACTIVE-40 to 851.70 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2854BDWTRACTIVE-40 to 851.65 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC2854BDWTRG4ACTIVE-40 to 851.65 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC2854BNACTIVE-40 to 851.70 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2854BNG4ACTIVE-40 to 851.70 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC2854BQACTIVE-40 to 852.00 | 1kuPLCC (FN) | 20 View 46 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC2854BQG3ACTIVE-40 to 852.00 | 1kuPLCC (FN) | 20 View 46 | 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 9:55 AM GMT, 26 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC2854BDW
AmericasArrow >1k
Avnet 35
Rochester Electronics >1k
AsiaWPI 44
WorldwideMouser Electronics 42
TI Lead Time*: 20 WeeksUC2854BDWG4
AsiaFarnell Asia 151
EuropeFarnell 136
TI Lead Time*: 20 WeeksUC2854BDWTR
AmericasArrow >1k
EuropeAvnet-SILICA >1k
TI Lead Time*: 20 WeeksUC2854BDWTRG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksUC2854BN
AmericasRochester Electronics >1k
EuropeArrow Northern Europe 50
Avnet-SILICA 25
TI Lead Time*: 20 WeeksUC2854BNG4
AsiaFarnell Asia 15
EuropeFarnell 10
TI Lead Time*: 4 WeeksUC2854BQ
AmericasAvnet 92
Rochester Electronics >1k
EuropeEBV Elektronik 46
Spoerle 92
TI Lead Time*: 4 WeeksUC2854BQG3
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
UC2854BDW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854BDWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854BDWTR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854BDWTRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC2854BN RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC2854BNG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC2854BQ RoHS Compliant Green (RoHS & no Sb/Br) CU SN Level-2-260C-1 YEARViewView
UC2854BQG3 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 UC2854B Help

Datasheet

Application Notes

View Application Notes for Power Factor Correction ICs

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
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.
UC3854B Enhanced High Power Factor Preregulator AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UCC28070 Two-Phase Interleaved CCM PFC Controller AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
UC2854B-EP Enhanced Product Advanced High-Power Factor Preregulator 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.
UC2875 Phase Shift Resonant Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
LP2985A-50 Single Output LDO, 150mA, Fixed(5.0V), 1.0% Tolerance, Low Quiescent Current, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
UCC2895 BiCMOS Advanced Phase Shift Resonant Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TPS70348 Dual-Output Low-Dropout (LDO) Voltage Regulators LINEAR REGULATORS-DUAL CHANNEL LDO TI customers also evaluated this product.
UCD7100 Digital Control Compatible Single Low-Side +/- 4Amp MOSFET Driver with Current Sense FUSION DIGITAL POWER(TM) CONTROL SOLUTIONS-FUSION DIGITAL POWER(TM) CONTROL DRIVERS TI customers also evaluated this product.
TPS61040 28-V, 400-mA Switch Boost Converter in SOT-23 for LCD and White LED Applications LIGHTING AND DISPLAY SOLUTIONS-WHITE LED DRIVERS TI customers also evaluated this product.
UC3844 Current-Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TPS73201 Single Output LDO, 250mA, Adj.(1.2 to 5.5V), Low Noise, Fast Transient Response LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
TPS70358 Dual-Output Low-Dropout (LDO) Voltage Regulators LINEAR REGULATORS-DUAL CHANNEL LDO TI customers also evaluated this product.
REF3033 3.3V 50ppm/Degrees C, 50uA in SOT23-3 Series (Bandgap) Voltage Reference VOLTAGE REFERENCE-SERIES VOLTAGE REFERENCE TI customers also evaluated this product.

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