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UC1825-SP Status: ACTIVE

High Speed PWM Controller


      
         
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Datasheet

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 UC1825-SP
TopologyBoost,Flyback,Forward,Full-Bridge,Half-Bridge,Push-Pull  
Control MethodCurrent Mode  
Duty Cycle(Max)(%)50  
PWM Outputs(#)2  
Frequency(Max)(kHz)1000  
UVLO Thresholds On/Off(V)9.2/8.4  
Pin/Package16CDIP, 20LCCC  
Regulated Outputs(#)2  
 Samples
 Inventory

Other qualified versions of UC1825-SP

Version Part Number Definition
Catalog UC1825 TI's standard catalog product

Customers Who Evaluated This Product Also Evaluated

  • UC1525B-SP: Regulating Pulse Width Modulators
  • UC1825: High Speed PWM Controller
  • UCC28610: 12-65W Green-mode Flyback Power Supply Controller

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Product Information

Features

  • QML-V Qualified, SMD 5962-87681
  • Rad-Tolerant: 30 kRad (Si) TID(1)
  • Compatible With Voltage- or Current-Mode Topologies
  • Practical Operation Switching Frequencies to 1 MHz
  • 50-ns Propagation Delay-to-Output
  • High-Current Dual Totem Pole Outputs (1.5 A Peak)
  • Wide Bandwidth Error Amplifier
  • Fully Latched Logic With Double-Pulse Suppression
  • Pulse-by-Pulse Current Limiting
  • Soft Start/Maximum Duty-Cycle Control
  • Undervoltage Lockout With Hysteresis
  • Low Start-Up Current (1.1 mA)

(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.

Description

The UC1825 PWM control device is optimized for high-frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.

Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty-cycle clamp. The logic is fully latched to provide jitter-free operation and prohibit multiple pulses at an output. An undervoltage lockout section with 800 mV of hysteresis assures low start up current.

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Pricing / Packaging / CAD Design Tools / Samples

PricePackagingCAD Design ToolsSamples
DeviceStatusTemp (oC)Price | QuantityPackage | PinsPackage QTY | Package CarrierSymbolsFootprintsSamples
5962-8768101V2AACTIVE-55 to 125336.10 | 100uLCCC (FK) | 20 1 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
5962-8768101VEAACTIVE-55 to 125310.05 | 100uCDIP (J) | 16 1 | TUBE Download CAD Format for this Symbol Download CAD Format for this FootprintPurchase Samples
5962-8768104V2AACTIVE-55 to 125376.43 | 100uLCCC (FK) | 20 1 | TUBE  Contact TI Distributor or Sales Office
5962-8768104VEAACTIVE-55 to 125347.26 | 100uCDIP (J) | 16 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, 22 Nov 2009
RegionCompanyIn StockPurchase
TI Lead Time*: 26 Weeks5962-8768101V2A
AmericasRochester Electronics 61
TI Lead Time*: 26 Weeks5962-8768101VEA
AmericasArrow 14
Avnet 7
Rochester Electronics 3
Call**5962-8768104VEA
AmericasArrow 33
Avnet 4
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
5962-8768101V2A  TBD POST-PLATE N/A for Pkg TypeViewView
5962-8768101VEA  TBD A42  N/A for Pkg TypeViewView
5962-8768104V2A  TBD POST-PLATE N/A for Pkg TypeViewView
5962-8768104VEA  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

Most useful technical documents for UC1825-SP Help

Datasheet

Customers Who Evaluated This Product Also Evaluated...
Part # Name Product Family Comments
UC1525B-SP Regulating Pulse Width Modulators AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC1825 High Speed PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UCC28610 12-65W Green-mode Flyback Power Supply Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC1825A-SP High Speed PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC1825A High Speed PWM Controller AC/DC AND DC/DC POWER SUPPLIES-PWM POWER SUPPLY CONTROLLERS TI customers also evaluated this product.
UC1846-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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