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TL3842 Status: ACTIVE

Current-Mode PWM Controller


      
         
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Datasheet

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 TL3842TL3843 TL3844 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

  • UC3842: Current-Mode PWM Controller
  • TL3842B: High-Performance Current-Mode PWM Controller
  • TL3843: Current-Mode PWM Controller
  • TLV1117: Single Output LDO, 800mA, Fixed and Adj., Internal Current limit, Thermal Overload Protection
  • LP2985A-50: Single Output LDO, 150mA, Fixed(5.0V), 1.0% Tolerance, Low Quiescent Current, Low Noise
  • UCD7100: Digital Control Compatible Single Low-Side +/- 4Amp MOSFET Driver with Current Sense

More Related Products

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.

Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges. Typical UVLO thresholds of 16 V (on) and 10 V (off) on the TLx842 and TLx844 devices make them ideally suited to off-line applications. The corresponding typical thresholds for the TLx843 and TLx845 devices are 8.4 V (on) and 7.6 V (off). The TLx842 and TLx843 devices can operate to duty cycles approaching 100%. A duty-cycle range of 0 to 50% is obtained by the TLx844 and TLx845 by the addition of an internal toggle flip-flop, which blanks the output off every other clock cycle.

The TL284x-series devices are characterized for operation from –40°C to 85°C. The TL384x devices are characterized for operation from 0° to 70°C.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
TL3842DACTIVE0 to 700.44 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842D-8ACTIVE0 to 700.44 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DE4ACTIVE0 to 700.44 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DE4-8ACTIVE0 to 700.44 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DG4ACTIVE0 to 700.44 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DG4-8ACTIVE0 to 700.44 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DRACTIVE0 to 700.40 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DR-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
TL3842DRE4ACTIVE0 to 700.40 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DRE4-8ACTIVE0 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
TL3842DRG4ACTIVE0 to 700.40 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3842DRG4-8ACTIVE0 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
TL3842PACTIVE0 to 700.44 | 1kuPDIP (P) | 8 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintContact TI Distributor or Sales Office
TL3842PE4ACTIVE0 to 700.44 | 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 10:35 AM GMT, 08 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 14 WeeksTL3842D
AmericasRochester Electronics >1k
TI Lead Time*: 15 WeeksTL3842D-8
AmericasRochester Electronics >1k
TI Lead Time*: 14 WeeksTL3842DE4
None Reported
View Distributors
TI Lead Time*: 15 WeeksTL3842DE4-8
WorldwideMouser Electronics >1k
TI Lead Time*: 14 WeeksTL3842DG4
None Reported
View Distributors
TI Lead Time*: 15 WeeksTL3842DG4-8
None Reported
View Distributors
TI Lead Time*: 18 WeeksTL3842DR
AmericasRochester Electronics 541
TI Lead Time*: 15 WeeksTL3842DR-8
AmericasRochester Electronics >1k
TI Lead Time*: 18 WeeksTL3842DRE4
None Reported
View Distributors
TI Lead Time*: 15 WeeksTL3842DRE4-8
None Reported
View Distributors
TI Lead Time*: 18 WeeksTL3842DRG4
None Reported
View Distributors
TI Lead Time*: 15 WeeksTL3842DRG4-8
None Reported
View Distributors
TI Lead Time*: 18 WeeksTL3842P
AmericasAvnet 500
Newark 635
Rochester Electronics >1k
AsiaFarnell Asia 182
WPI 2
EuropeEBV Elektronik 100
Farnell 169
WorldwideDigiKey 189
Mouser Electronics 192
TI Lead Time*: 18 WeeksTL3842PE4
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
TL3842D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842D-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DE4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DR-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DRE4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842DRG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEARViewView
TL3842P RoHS Compliant Pb-Free (RoHS) CU NIPDAU N/A for Pkg TypeViewView
TL3842PE4 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

Application Notes

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Selection Guides

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