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UC2827-2 Status: ACTIVE

Buck Current/Voltage Fed Push-Pull PWM Controllers


      
         
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 UC2827-2UC3827-2 
TopologyBuck, Full-Bridge, Push-Pull  Buck, Full-Bridge, Push-Pull  
Control MethodCurrent Mode  Current Mode  
Duty Cycle(Max)(%)50  50  
PWM Outputs(#)3  3  
Frequency(Max)(kHz)450  450  
UVLO Thresholds On/Off(V)9/8.4  9/8.4  
Pin/Package24SOIC  24PDIP, 24SOIC  
Regulated Outputs(#)3  3  
 SamplesSamples
 InventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • UCC3895: BiCMOS Advanced Phase Shift PWM Controller
  • UCC28230: Advanced PWM Controller for Bus Converters
  • UC3846M: Current Mode PWM Controller

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Product Information

Features

  • Ideal for Multiple Output and/or High Voltage Output Voltage Converters
  • Up to 500 kHz Operation
  • High Voltage, High Current Floating Driver for Buck Converter Stage
  • UC3827-1 Current Fed Controller has Push-Pull Drivers with Overlapping Conduction Periods
  • UC3827-2 Voltage Fed Controller has Push-Pull Drivers with Nonoverlapping Conduction Periods
  • Average Current Mode, Peak Current Mode or Voltage Mode with Input Voltage Feedforward Control for Buck Power Stage
  • Wide Bandwidth, Low Offset, Differential Current Sense Amplifier
  • Precise Short Circuit Current Control

Description

The UC3827 family of controller devices provides an integrated control solution for cascaded buck and push-pull converters. These converters are known as current fed or voltage fed push-pull converters and are ideally suited for multiple output and/or high voltage output applications. In both current fed and voltage fed modes, the push-pull switches are driven at 50% nominal duty cycles and at one half the switching frequency of the buck stage. In the current fed mode, the two switches are driven with a specified over-lap period to prevent ringing and voltage stress on the devices. In the voltage fed mode, the two switches are driven with a specified gap time between the switches to prevent shorting the transformer across the energy storage capacitor and to prohibit excessive currents flowing through the devices.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
UC2827DW-2ACTIVE-40 to 854.75 | 1kuSOIC (DW) | 24 View 25 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
UC2827DW-2G4ACTIVE-40 to 854.75 | 1kuSOIC (DW) | 24 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 9:53 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksUC2827DW-2
AmericasRochester Electronics 75
EuropeAvnet-SILICA 400
WorldwideDigiKey 96
TI Lead Time*: 20 WeeksUC2827DW-2G4
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
UC2827DW-2 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView
UC2827DW-2G4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-3-260C-168 HRViewView

* 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 UC2827-2 Help

Datasheet

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Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UCC3895 BiCMOS Advanced Phase Shift PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC28230 Advanced PWM Controller for Bus Converters AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC3846M Current Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC3824 High Speed PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC1846-SP Current-Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC35706 High Speed Voltage Mode Pulse Width Modulator AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.

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