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TL2844 Status: ACTIVE

Current-Mode PWM Controller


      
         
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Datasheet

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 TL2842 TL2843 TL2844TL2845 
TopologyBoost, Flyback, Forward  Boost, Flyback, Forward  Boost, Flyback, Forward  Boost, Flyback, Forward  
Control MethodCurrent Mode  Current Mode  Current Mode  Current Mode  
Duty Cycle(Max)(%)100  100  50  50  
PWM Outputs(#)1  1  1  1  
Frequency(Max)(kHz)500  500  500  500  
UVLO Thresholds On/Off(V)16/10  8.4/7.6  16/10  8.4/7.6  
Pin/Package14SOIC, 8PDIP, 8SOIC  14SOIC, 8PDIP, 8SOIC  14SOIC, 8PDIP, 8SOIC  14SOIC, 8PDIP, 8SOIC  
Regulated Outputs(#)1  1  1  1  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • TL2844B: High-Performance Current-Mode PWM Controller

Product Information

Features

  • Optimized for Off-Line and dc-to-dc Converters
  • Low Start-Up Current (<1 mA)
  • Automatic Feed-Forward Compensation
  • Pulse-by-Pulse Current Limiting
  • Enhanced Load-Response Characteristics
  • Undervoltage Lockout With Hysteresis
  • Double-Pulse Suppression
  • High-Current Totem-Pole Output
  • Internally Trimmed Bandgap Reference
  • 500-kHz Operation
  • Error Amplifier With Low Output Resistance
  • Designed to Be Interchangeable With UC2842 and UC3842 Series

Description

The TL284x and TL384x series of control integrated circuits provide the features that are necessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes, with a minimum number of external components. Some of the internally implemented circuits are an undervoltage lockout (UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation (PWM) comparator (that also provides current-limit control), and a totem-pole output stage designed to source or sink high-peak current. The output stage, suitable for driving N-channel MOSFETs, is low when it is in the off state.

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Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
TL2844DACTIVE-40 to 850.50 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL2844D-8ACTIVE-40 to 850.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL2844DE4ACTIVE-40 to 850.50 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL2844DE4-8ACTIVE-40 to 850.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL2844DG4ACTIVE-40 to 850.50 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL2844DG4-8ACTIVE-40 to 850.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL2844DRACTIVE-40 to 850.45 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL2844DR-8ACTIVE-40 to 850.45 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL2844DRE4ACTIVE-40 to 850.45 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL2844DRE4-8ACTIVE-40 to 850.45 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL2844DRG4ACTIVE-40 to 850.45 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL2844DRG4-8ACTIVE-40 to 850.45 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL2844PACTIVE-40 to 850.45 | 1kuPDIP (P) | 8 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL2844PE4ACTIVE-40 to 850.45 | 1kuPDIP (P) | 8 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office

* 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 10:40 AM GMT, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 18 WeeksTL2844D
AmericasAvnet 1k
Rochester Electronics >1k
EuropeAvnet-SILICA 400
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL2844D-8
AmericasRochester Electronics >1k
EuropeAvnet-SILICA 825
WorldwideDigiKey  Available
Mouser Electronics 45
TI Lead Time*: 18 WeeksTL2844DE4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL2844DE4-8
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTL2844DG4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL2844DG4-8
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTL2844DR
WorldwideDigiKey 28
TI Lead Time*: 15 WeeksTL2844DR-8
AmericasArrow >1k
Avnet >1k
Rochester Electronics >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 18 WeeksTL2844DRE4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL2844DRE4-8
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTL2844DRG4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL2844DRG4-8
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTL2844P
AmericasAvnet >1k
Rochester Electronics 800
EuropeCompel >1k
WorldwideDigiKey 924
Mouser Electronics 322
TI Lead Time*: 18 WeeksTL2844PE4
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
TL2844D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844D-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DE4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DR-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DRE4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844DRG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL2844P RoHS Compliant Pb-Free (RoHS) CU NIPDAU N/A for Pkg TypeViewView
TL2844PE4 RoHS Compliant Pb-Free (RoHS) 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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Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
TL2844B High-Performance Current-Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.

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