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UC1843A-SP Status: ACTIVE

Current Mode PWM Controller


      
         
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 UC1843A-SP
TopologyBoost,Flyback,Forward  
Control MethodCurrent Mode  
Duty Cycle(Max)(%)100  
PWM Outputs(#)1  
Frequency(Max)(kHz)450  
UVLO Thresholds On/Off(V)8.4/7.6  
Pin/Package20LCCC, 8CDIP  
Regulated Outputs(#)1  
 Samples
 Inventory

Other qualified versions of UC1843A-SP

Version Part Number Definition
Catalog UC1843A TI's standard catalog product
Enhanced Product UC1843A-EP Supports Defense, Aerospace and Medical Applications

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Product Information

Features

  • QML-V Qualified, SMD 5962-86704
  • Rad-Tolerant: 30 kRad (Si) TID(1)(2)
  • Optimized for Offline and DC-to-DC Converters
  • Low Start-Up Current (<0.5 mA)
  • Trimmed Oscillator Discharge Current
  • 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
  • Low RO Error Amplifier

(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.
(2) 5962-8670409VPA currently offered. Contact factory for additional devices.

Description

The UC1842A/3A/4A/5A family of control IC’s is a pin for pin compatible improved version of the UC1842/3/4/5 family.Providing the necessary features to control current-mode switched-mode power supplies, this device has the following improved features. Start up current is guaranteed to be less than 0.5 mA. Oscillator discharge is trimmed to 8.3 mA. During undervoltage lockout, the output stage can sink at least 10 mA at less than 1.2 V for VCC over 5 V.

The difference between members of this family are shown in Table 1.

    

Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsTop Side MarkingPackage QTY | Package CarrierSymbolsFootprintsSamples
5962-8670406VPAACTIVE-55 to 125204.04 | 100uCDIP (JG) | 8 View 1 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
5962-8670406VXAACTIVE-55 to 125230.53 | 100uLCCC (FK) | 20  1 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
5962-8670409VPAACTIVE-55 to 125228.52 | 100uCDIP (JG) | 8 View 1 | TUBE  Contact 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 9:55 AM GMT, 25 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 26 Weeks5962-8670406VPA
None Reported
View Distributors
TI Lead Time*: 20 Weeks5962-8670406VXA
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
5962-8670406VPA  TBD A42  N/A for Pkg TypeViewView
5962-8670406VXA  TBD POST-PLATE N/A for Pkg TypeViewView
5962-8670409VPA  TBD A42  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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UC1843-SP 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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