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TL2845 Status: ACTIVE

Current-Mode PWM Controller


      
         
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 TL2842 TL2843 TL2844 TL2845
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

  • TPS61085: 18.5V, 2A, 650kHz, 1.2MHz Step-Up DC-DC Converter with Forced PWM Mode
  • TPS2051B: Single, Current-Limited, Power-Distribution Switch
  • TPS54620: 4.5V to 17V Input, 6A Synchronous Step Down SWIFT™ Converter

    • 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
    TL2845DACTIVE-40 to 850.50 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845D-8ACTIVE-40 to 850.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DE4ACTIVE-40 to 850.50 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DE4-8ACTIVE-40 to 850.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DG4ACTIVE-40 to 850.50 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DG4-8ACTIVE-40 to 850.50 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DRACTIVE-40 to 850.45 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DR-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
    TL2845DRE4ACTIVE-40 to 850.45 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DRE4-8ACTIVE-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
    TL2845DRG4ACTIVE-40 to 850.45 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845DRG4-8ACTIVE-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
    TL2845PACTIVE-40 to 850.45 | 1kuPDIP (P) | 8 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
    TL2845PE4ACTIVE-40 to 850.45 | 1kuPDIP (P) | 8 View 50 | 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 10:40 AM GMT, 22 Nov 2009
    RegionCompanyIn StockPurchase
    TI Lead Time*: 18 WeeksTL2845D
    AmericasAvnet 200
    Rochester Electronics 830
    TI Lead Time*: 15 WeeksTL2845D-8
    AmericasRochester Electronics 30
    EuropeAvnet-SILICA 225
    EBV Elektronik 10
    WorldwideDigiKey  Available
    Mouser Electronics 7
    TI Lead Time*: 18 WeeksTL2845DE4
    None Reported
    View Distributors
    TI Lead Time*: 15 WeeksTL2845DE4-8
    WorldwideDigiKey  Available
    TI Lead Time*: 18 WeeksTL2845DG4
    None Reported
    View Distributors
    TI Lead Time*: 15 WeeksTL2845DG4-8
    WorldwideDigiKey  Available
    TI Lead Time*: 18 WeeksTL2845DR
    AmericasRochester Electronics >1k
    TI Lead Time*: 15 WeeksTL2845DR-8
    AmericasRochester Electronics >1k
    WorldwideDigiKey >1k
    TI Lead Time*: 18 WeeksTL2845DRE4
    None Reported
    View Distributors
    TI Lead Time*: 15 WeeksTL2845DRE4-8
    WorldwideDigiKey  Available
    TI Lead Time*: 18 WeeksTL2845DRG4
    None Reported
    View Distributors
    TI Lead Time*: 15 WeeksTL2845DRG4-8
    WorldwideDigiKey  Available
    TI Lead Time*: 18 WeeksTL2845P
    AmericasArrow >1k
    Rochester Electronics >1k
    EuropeSpoerle 500
    WorldwideMouser Electronics 55
    TI Lead Time*: 18 WeeksTL2845PE4
    None Reported
    View Distributors
    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
    TL2845D RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845D-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DE4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DR-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DRE4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DRE4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845DRG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
    TL2845P RoHS Compliant Pb-Free (RoHS) CU NIPDAU N/A for Pkg TypeViewView
    TL2845PE4 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

    Most useful technical documents for TL2845 Help

    Datasheet

    Selection Guides

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    TPS2051B Single, Current-Limited, Power-Distribution Switch PCMCIA AND USB-USB POWER SWITCHES TI customers also evaluated this product.
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