Startseite Energiemanagement AC/DC- und DC/DC-Controller (externer FET)

UCC2893

AKTIV

Active-Clamp-PWM-Controller im Strommodus, 110 V, mit FET mit N-Kanal-Klemme und 0,75 V CS-Schwelle

Produktdetails

Vin (max) (V) 16 Operating temperature range (°C) -40 to 105 Control mode Current Topology Active-clamp forward, Flyback, Forward Rating Catalog Features High-voltage startup, Input line monitor, Multi-topology, Programmable slope compensation, Soft start, Soft switching, Supports NFET clamp Duty cycle (max) (%) 100
Vin (max) (V) 16 Operating temperature range (°C) -40 to 105 Control mode Current Topology Active-clamp forward, Flyback, Forward Rating Catalog Features High-voltage startup, Input line monitor, Multi-topology, Programmable slope compensation, Soft start, Soft switching, Supports NFET clamp Duty cycle (max) (%) 100
SOIC (D) 16 59.4 mm² 9.9 x 6 TSSOP (PW) 16 32 mm² 5 x 6.4
  • Low Output Jitter
  • Soft-Stop Shutdown of MAIN and AUX
  • Ideal for Active Clamp/Reset Forward, Flyback Converters
  • Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
  • Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
  • 110-V Input Startup Regulator on UCC2891/3
  • TrueDrive™ 2-A Sink, 2-A Source Outputs
  • Accurate Line UV and Line OV Threshold
  • Programmable Slope Compensation
  • 1.0-MHz Synchronizable Oscillator
  • Precise Programmable Maximum Duty Cycle
  • Programmable Soft Start
  • APPLICATIONS
    • 150-W to 700-W SMPS
    • High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
    • Server, 48-V Telecom, Datacom
    • High Power Adapter, LCD-TV and PDP-TV

  • Low Output Jitter
  • Soft-Stop Shutdown of MAIN and AUX
  • Ideal for Active Clamp/Reset Forward, Flyback Converters
  • Provides Complementary Auxiliary Driver with Programmable Deadtime (Turn-On Delay) between AUX and MAIN Switches
  • Peak Current-Mode Control with Cycle-by-Cycle Current Limiting
  • 110-V Input Startup Regulator on UCC2891/3
  • TrueDrive™ 2-A Sink, 2-A Source Outputs
  • Accurate Line UV and Line OV Threshold
  • Programmable Slope Compensation
  • 1.0-MHz Synchronizable Oscillator
  • Precise Programmable Maximum Duty Cycle
  • Programmable Soft Start
  • APPLICATIONS
    • 150-W to 700-W SMPS
    • High-Efficiency, Low EMI/RFI Off-Line or DC/DC Converters
    • Server, 48-V Telecom, Datacom
    • High Power Adapter, LCD-TV and PDP-TV

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897, this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.

The UCC2891/2/3/4 family of PWM controllers is designed to simplify implementation of the various active clamp/reset switching power topologies.

The UCC289x is a peak current-mode, fixedfrequency, high-performance pulse width modulator. It includes the logic and the drive capability for the auxiliary switch with a simple method of programming the critical delays for proper active clamp operation.

The UCC2891/3 includes a 110-V start-up regulator for initial start-up and to provide keep-alive power during stand-by.

Additional features include an internal programmable slope compensation circuit, precise DMAX limit, and a single resistor programmable synchronizable oscillator. An accurate line monitoring function also programs the converter\x92s ON and OFF transitions with regard to the bulk input voltage. Along with the UCC2897, this UCC289x family allows the power supply designer to eliminate many of the external components, reducing the size and complexity of the design.

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Technische Dokumentation

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Alle anzeigen 7
Typ Titel Datum
* Data sheet UCC289x Current Mode Active Clamp PWM Controller datasheet (Rev. F) 01 Jul 2009
Application note Understanding and Designing an Active Clamp Current Mode Controlled Converter (Rev. A) 27 Jan 2020
Selection guide Power Management Guide 2018 (Rev. R) 25 Jun 2018
Application note Method of Providing Hiccup Operation for UCC2897AEVM 27 Aug 2009
Application note UCC2891 Active Clamp 22 Dez 2003
More literature Seminar 1000 Topic 3 - Active Clamp and Reset Technique 15 Feb 2001
More literature Seminar 1100 Topic 3 - Design Considerations for Active Clamp and Reset 15 Feb 2001

Design und Entwicklung

Weitere Bedingungen oder erforderliche Ressourcen enthält gegebenenfalls die Detailseite, die Sie durch Klicken auf einen der unten stehenden Titel erreichen.

Simulationsmodell

UCC2893 Unencrypted PSpice Transient Model Package (Rev. A)

SLUM034A.ZIP (122 KB) - PSpice Model
Simulationsmodell

UCC289x PSpice Average Model

SLUC118.ZIP (353 KB) - PSpice Model
Simulationsmodell

UCC289x TINA-TI Average Reference Design

SLUM154.TSC (834 KB) - TINA-TI Reference Design
Simulationsmodell

UCC289x TINA-TI Average Spice Model

SLUM155.ZIP (12 KB) - TINA-TI Spice Model
Gehäuse Pins CAD-Symbole, Footprints und 3D-Modelle
SOIC (D) 16 Ultra Librarian
TSSOP (PW) 16 Ultra Librarian

Bestellen & Qualität

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  • MSL-Rating / Spitzenrückfluss
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  • Materialinhalt
  • Qualifikationszusammenfassung
  • Kontinuierliches Zuverlässigkeitsmonitoring
Beinhaltete Information:
  • Werksstandort
  • Montagestandort

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