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TL3843B Status: ACTIVE

High-Performance Current-Mode PWM Controller


      
         
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 TL3842B TL3843BTL3844B TL3845B 
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, 8SOIC, 8PDIP  
Regulated Outputs(#)1  1  1  1  
 SamplesSamplesSamplesSamples
 InventoryInventoryInventoryInventory

Customers Who Evaluated This Product Also Evaluated

  • UCC28086: Current Mode Push-Pull PWM With Programmable Slope Compensation
  • UC3843A: Current Mode PWM Controller
  • UCC28060: Natural Interleaved Dual-Phase Transition-Mode PFC Controller
  • TPS3106K33: Ultra Low-Supply Current/Supply-Voltage Supervisory Circuits
  • TPS73001: Single Output LDO, 200mA, Adj.(1.5 to 5.5V), High PSRR, Low Noise

Product Information

Features

  • Low Start-Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • Current Mode Operation to 500 kHz
  • Automatic Feed-Forward Compensation
  • Latching PWM for Cycle-by-Cycle Current Limiting
  • Internally Trimmed Reference With Undervoltage Lockout
  • High-Current Totem-Pole Output Undervoltage Lockout With Hysteresis
  • Double-Pulse Suppression

DESCRIPTION/ORDERING INFORMATION

The TL284xB and TL384xB 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. Internally implemented circuits include an undervoltage lockout (UVLO) and a precision reference that is 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.

The TL284xB and TL384xB series are pin compatible with the standard TL284x and TL384x with the following improvements. The start-up current is specified to be 0.5 mA (max), while the oscillator discharge current is trimmed to 8.3 mA (typ). In addition, during undervoltage lockout conditions, the output has a maximum saturation voltage of 1.2 V while sinking 10 mA (VCC = 5 V).

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 TLx842B and TLx844B devices make them ideally suited to off-line applications. The corresponding typical thresholds for the TLx843B and TLx845B devices are 8.4 V (on) and 7.6 V (off). The TLx842B and TLx843B devices can operate to duty cycles approaching 100%. A duty-cycle range of 0% to 50% is obtained by the TLx844B and TLx845B by the addition of an internal toggle flip-flop, which blanks the output off every other clock cycle.The TL284xB-series devices are characterized for operation from -40°C to 85°C. The TL384xB-series devices are characterized for operation from 0°C to 70°C.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
TL3843BDACTIVE0 to 700.60 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
TL3843BD-8ACTIVE0 to 700.60 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843BDG4ACTIVE0 to 700.60 | 1kuSOIC (D) | 14 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this Footprint
TL3843BDG4-8ACTIVE0 to 700.60 | 1kuSOIC (D) | 8 View 75 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843BDRACTIVE0 to 700.55 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843BDR-8ACTIVE0 to 700.55 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843BDRG4ACTIVE0 to 700.55 | 1kuSOIC (D) | 14 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843BDRG4-8ACTIVE0 to 700.55 | 1kuSOIC (D) | 8 View 2500 | LARGE T&R Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843BPACTIVE0 to 700.55 | 1kuPDIP (P) | 8 View 50 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
TL3843BPE4ACTIVE0 to 700.55 | 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 10:42 AM GMT, 24 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 20 WeeksTL3843BD
AmericasArrow >1k
Rochester Electronics 800
AsiaWPI 65
WorldwideDigiKey 118
TI Lead Time*: 15 WeeksTL3843BD-8
AmericasArrow >1k
Avnet 525
Newark 618
Rochester Electronics >1k
AsiaFarnell Asia 626
WPI 40
WorldwideMouser Electronics 682
TI Lead Time*: 20 WeeksTL3843BDG4
WorldwideDigiKey  Available
TI Lead Time*: 15 WeeksTL3843BDG4-8
None Reported
View Distributors
TI Lead Time*: 20 WeeksTL3843BDR
AmericasArrow >1k
Rochester Electronics >1k
EuropeAvnet-SILICA >1k
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksTL3843BDR-8
AmericasRochester Electronics >1k
TI Lead Time*: 20 WeeksTL3843BDRG4
WorldwideDigiKey  Available
TI Lead Time*: 20 WeeksTL3843BDRG4-8
None Reported
View Distributors
TI Lead Time*: 20 WeeksTL3843BP
AmericasArrow 850
Newark 97
Rochester Electronics 850
AsiaFarnell Asia 99
WPI 81
WorldwideMouser Electronics 789
TI Lead Time*: 20 WeeksTL3843BPE4
WorldwideMouser Electronics 838
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
TL3843BD RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BD-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BDG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BDG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BDR RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BDR-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BDRG4 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BDRG4-8 RoHS Compliant Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIMViewView
TL3843BP RoHS Compliant Pb-Free (RoHS) CU NIPDAU N/A for Pkg TypeViewView
TL3843BPE4 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 TL3843B Help

Datasheet

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UCC28086 Current Mode Push-Pull PWM With Programmable Slope Compensation AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC3843A Current Mode PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC28060 Natural Interleaved Dual-Phase Transition-Mode PFC Controller AC/DC AND DC/DC POWER SUPPLIES-POWER FACTOR CORRECTION ICS TI customers also evaluated this product.
TPS3106K33 Ultra Low-Supply Current/Supply-Voltage Supervisory Circuits POWER MANAGEMENT-SUPERVISORY CIRCUITS(VOLTAGE SUPERVISORS) TI customers also evaluated this product.
TPS73001 Single Output LDO, 200mA, Adj.(1.5 to 5.5V), High PSRR, Low Noise LINEAR REGULATORS-SINGLE CHANNEL LDO TI customers also evaluated this product.
TLV1117-33 Single Output LDO, 800mA, Fixed(3.3), Internal Current limit, Thermal Overload Protection LINEAR REGULATORS-STANDARD VOLTAGE REGULATORS TI customers also evaluated this product.
TPS3705-33 Processor Supervisory Circuits with Power-Fail POWER MANAGEMENT-SUPERVISORY CIRCUITS(VOLTAGE SUPERVISORS) TI customers also evaluated this product.

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