SLUS829G August   2008  – February 2020 UCC2897A

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
    1.     Device Images
      1.      Typical Application Diagram
  4. 4 Revision History
  5. 5 Device Options
  6. 6 Pin Configuration and Functions
    1.     Pin Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Detailed Pin Descriptions
        1. 8.3.1.1  RDEL
        2. 8.3.1.2  RON
        3. 8.3.1.3  ROFF
        4. 8.3.1.4  VREF
        5. 8.3.1.5  SYNC
        6. 8.3.1.6  GND
        7. 8.3.1.7  CS
        8. 8.3.1.8  RSLOPE
        9. 8.3.1.9  FB
        10. 8.3.1.10 SS/SD
        11. 8.3.1.11 PGND
        12. 8.3.1.12 AUX
        13. 8.3.1.13 OUT
        14. 8.3.1.14 VDD
        15. 8.3.1.15 LINEUV
        16. 8.3.1.16 VIN
        17. 8.3.1.17 LINEOV
      2. 8.3.2 JFET Control and UVLO
      3. 8.3.3 Line Undervoltage Protection
      4. 8.3.4 Line Overvoltage Protection
      5. 8.3.5 Pulse Skipping
      6. 8.3.6 Synchronization
      7. 8.3.7 Gate Drive Connection
      8. 8.3.8 Bootstrap Biasing
    4. 8.4 Device Functional Modes
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Oscillator
        2. 9.2.2.2 Soft Start
        3. 9.2.2.3 VDD Bypass Requirements
        4. 9.2.2.4 Delay Programming
        5. 9.2.2.5 Input Voltage Monitoring
        6. 9.2.2.6 Current Sense and Slope Compensation
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Receiving Notification of Documentation Updates
    3. 12.3 Community Resources
    4. 12.4 Trademarks
    5. 12.5 Electrostatic Discharge Caution
    6. 12.6 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

12.1.1 Related Documentation

  1. Evaluation Module: UCC2891EVM, 48-V to 3.3-V, 30-A Forward Converter with Active Clamp Reset. (SLUU407).
  2. User’s Guide: Using the UCC2897AEVM, 48-V to 3.3-V Forward Converter with Active Clamp Reset (SLUU357).
  3. Application Note: Understanding and Designing an Active Clamp Current Mode Controlled Converter (SLUA535).
  4. Power Supply Design Seminar Topic: Design Considerations for Active Clamp and Reset Technique, D. Dalal, SEM1100-Topic 3 (SLUP112).
  5. Power Supply Design Seminar Topic: Active Clamp and Reset Technique Enhances Forward Converter Performance, B. Andreycak, SEM1000-Topic 3 (SLUP108).
  6. Power Supply Design Seminar Topic: Design and Application Guide for High Speed MOSFET Gate Drive Circuits, L. Balogh, SEM1400-Topic 2 (SLUP169).
  7. Datasheet: UCC3580, Single Ended Active-Clamp/Reset PWM Controller (SLUS292).
  8. Evaluation Module: UCC3580EVM, Flyback Converters, Active Clamp vs. Hard-Switched (SLUU085).
  9. Reference Designs: Highly Efficient 100W Isolated Power Supply Reference Design Using UCC3580-1. Texas Instruments Hardware Reference Design Number PMP206.
  10. Reference Designs: Active Clamp Forward Reference Design using UCC3580-1. Texas Instruments Hardware Reference Design Number PMP368
  11. Application Note: Method of Providing Hiccup Operation for UCC2897AEVM (SLUA532)
  12. Application Note: External Slope Compensation for UCC2897A in Some Special Applications (SLUA548)