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UC28025 Status: ACTIVE

Economy High Speed PWM Controller


      
         
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Datasheet

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 UC28025
TopologyBoost, Flyback, Forward, Full-Bridge, Half-Bridge, Push-Pull  
Control MethodCurrent Mode  
Duty Cycle(Max)(%)100  
PWM Outputs(#)2  
Frequency(Max)(kHz)1000  
UVLO Thresholds On/Off(V)9.2/8.4  
Pin/Package16PDIP, 16SOIC  
Regulated Outputs(#)2  
 Samples
 Inventory

Customers Who Evaluated This Product Also Evaluated

  • UCC28220: Dual Interleaved PWM Controller with Programmable Max Duty Cycle
  • UCC28230: Advanced PWM Controller for Bus Converters
  • UCC28610: 12-65W Green-mode Flyback Power Supply Controller
  • UCC27200: 120V Boot, 3-A Peak, High Frequency, High-Side/Low-Side Driver
  • DCH010515D: Miniature, 1W, 3kVDC Isolated DC/DC Converters
  • TPS54612: 3V to 6V, 6A Synchronous Step Down SWIFT™ Converter with 1.2V Output

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Product Information

Features

  • Peak Current Mode, Average Current Mode, or Voltage Mode (with Feed-Forward) Control Methods
  • Practical Operation Up to 1 MHz
  • 50-ns Propagation Delay to Output
  • ±1.5-A Peak Totem Pole Outputs
  • 9-V to 30-V Nominal Operational Voltage Range
  • Wide Bandwidth Error Amplifier
  • Fully Latched Logic with Double Pulse Suppression
  • Pulse-by-Pulse Current Limiting
  • Programmable Maximum Duty Cycle Control
  • Under-Voltage Lockout with Hysteresis
  • Trimmed 5.1-V Reference with UVLO
  • Same Functionality as UC3823 and UC3825
  • APPLICATIONS
    • Off-Line and DC/DC Power Supplies
    • Converters Using Voltage Mode, Peak Current Mode, or Average Current Mode Control Methods
    • Single-Ended or Two-Switch Topology Designs

Description

The UC28023 and UC28025 are fixed-frequency PWM controllers optimized for high-frequency switched-mode power supply applications. The UC28023 is a single output PWM for single-ended topologies while the UC28025 offers dual alternating outputs for double-ended and full bridge topologies.

Targeted for cost effective solutions with minimal external components, UC2802x include an oscillator, a temperature compensated reference, a wide band width error amplifier, a high-speed current-sense comparator and high-current active-high totem-pole outputs to directly drive external MOSFETs.

Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft-start pin which will double as a maximum duty cycle clamp.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC28025DWACTIVE-40 to 1051.50 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC28025DWG4ACTIVE-40 to 1051.50 | 1kuSOIC (DW) | 16 View 40 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC28025DWRACTIVE-40 to 1051.35 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC28025DWRG4ACTIVE-40 to 1051.35 | 1kuSOIC (DW) | 16 View 2000 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC28025NACTIVE-40 to 1051.80 | 1kuPDIP (N) | 16 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
UC28025NG4ACTIVE-40 to 1051.80 | 1kuPDIP (N) | 16 View 25 | 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 9:54 AM GMT, 20 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC28025DW
AmericasArrow 19
Newark 4
Rochester Electronics 257
TI Lead Time*: 20 WeeksUC28025DWG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksUC28025DWR
AmericasRochester Electronics >1k
TI Lead Time*: 20 WeeksUC28025DWRG4
None Reported
View Distributors
TI Lead Time*: 20 WeeksUC28025N
AmericasNewark 190
Rochester Electronics >1k
AsiaWPI 56
EuropeArrow Southern Europe 250
WorldwideDigiKey 566
TI Lead Time*: 20 WeeksUC28025NG4
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
UC28025DW RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC28025DWG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC28025DWR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC28025DWRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
UC28025N RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU N/A for Pkg TypeViewView
UC28025NG4 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.

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 UC28025 Help

Datasheet

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