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TL3843 Status: ACTIVE

Current-Mode PWM Controller


      
         
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Datasheet

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 TL3842 TL3843TL3844 TL3845 
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, 8SOIC, 8PDIP  14SOIC, 8PDIP, 8SOIC  14SOIC, 8PDIP, 8SOIC  14SOIC, 8PDIP, 8SOIC  
Regulated Outputs(#)1  1  1  1  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • UC3843: Current-Mode PWM Controller
  • TL3842: 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.

View All Description in Datasheet

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
TL3843DACTIVE0 to 700.40 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843D-8ACTIVE0 to 700.40 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843D-8E4ACTIVE0 to 700.40 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843DE4ACTIVE0 to 700.40 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843DG4ACTIVE0 to 700.40 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843DG4-8ACTIVE0 to 700.40 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843DRACTIVE0 to 700.40 | 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
TL3843DR-8ACTIVE0 to 700.40 | 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
TL3843DR-8E4ACTIVE0 to 700.40 | 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
TL3843DRE4ACTIVE0 to 700.40 | 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
TL3843DRG4ACTIVE0 to 700.40 | 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
TL3843DRG4-8ACTIVE0 to 700.40 | 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
TL3843PACTIVE0 to 700.40 | 1kuPDIP (P) | 8 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL3843PE4ACTIVE0 to 700.40 | 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 WeeksTL3843D
AmericasRochester Electronics 200
EuropeEBV Elektronik 100
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL3843D-8
AmericasRochester Electronics >1k
AsiaFarnell Asia >1k
EuropeFarnell >1k
WorldwideMouser Electronics 89
TI Lead Time*: 15 WeeksTL3843D-8E4
None Reported
View Distributors
TI Lead Time*: 18 WeeksTL3843DE4
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTL3843DG4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL3843DG4-8
EuropeEBV Elektronik 75
TI Lead Time*: 18 WeeksTL3843DR
AmericasRochester Electronics >1k
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 15 WeeksTL3843DR-8
AsiaWintech >1k
TI Lead Time*: 15 WeeksTL3843DR-8E4
None Reported
View Distributors
TI Lead Time*: 18 WeeksTL3843DRE4
WorldwideDigiKey  Available
TI Lead Time*: 18 WeeksTL3843DRG4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL3843DRG4-8
None Reported
View Distributors
TI Lead Time*: 18 WeeksTL3843P
AmericasArrow 780
Newark 402
Rochester Electronics >1k
AsiaFarnell Asia 84
Wintech >1k
EuropeAvnet-SILICA 700
Farnell 41
WorldwideDigiKey >1k
Mouser Electronics >1k
TI Lead Time*: 18 WeeksTL3843PE4
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
TL3843D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843D-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843D-8E4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DR-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DR-8E4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843DRG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843P RoHS Compliant Pb-Free (RoHS) CU NIPDAU N/A for Pkg TypeViewView
TL3843PE4 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.

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

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Datasheet

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Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UC3843 Current-Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
TL3842 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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