SLUSEW0 December   2023 UCC28750

PRODUCTION DATA  

1.   1
2. 1 Features
3. 2 Applications
4. 3 Description
5. 4 Device Comparison
6. 5 Pin Configuration and Functions
7. 6 Specifications
   1. 6.1 Absolute Maximum Ratings
   2. 6.2 ESD Ratings
   3. 6.3 Recommended Operating Conditions
   4. 6.4 Thermal Information
   5. 6.5 Electrical Characteristics
   6. 6.6 Switching Characteristics
   7. 6.7 Timing Requirements
   8. 6.8 Typical Characteristics
8. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Detailed Pin Descriptions
      1. 7.3.1 VDD - Input Bias
      2. 7.3.2 DRV - Gate Drive Out
      3. 7.3.3 CS - Current Sensing
      4. 7.3.4 FB - Feedback
      5. 7.3.5 FLT - Fault
      6. 7.3.6 GND - Ground Return
   4. 7.4 Feature Description
      1. 7.4.1 Soft Start
      2. 7.4.2 Control Law
      3. 7.4.3 Frequency Dithering
      4. 7.4.4 Fault Protections
         1. 7.4.4.1 VDD Overvoltage and Undervoltage Lockout
         2. 7.4.4.2 Internal Overtemperature Protection
         3. 7.4.4.3 Output Overpower Protection
         4. 7.4.4.4 Output Short-Circuit Protection
         5. 7.4.4.5 FLT Pin Protections
      5. 7.4.5 Slope Compensation
   5. 7.5 Device Functional Modes
      1. 7.5.1 Off
      2. 7.5.2 Startup
      3. 7.5.3 On
      4. 7.5.4 Fault
      5. 7.5.5 Disabled
9. 8 Application and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Application
      1. 8.2.1 Application
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
         1. 8.2.3.1 Input Bulk Capacitance with Minimum Bulk Voltage
         2. 8.2.3.2 Transformer Turns Ratio and Inductance
         3. 8.2.3.3 Current Sense and Slope Compensation Network
         4. 8.2.3.4 Output Capacitors
         5. 8.2.3.5 VDD Capacitance, CVDD
      4. 8.2.4 Application Performance Plots
         1. 8.2.4.1 Startup
         2. 8.2.4.2 Load Transients
         3. 8.2.4.3 Q1 Drain Voltage Evaluation
      5. 8.2.5 What to Do and What Not to Do
   3. 8.3 Power Supply Recommendations
   4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
       1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
11. 10Revision History
12. 11Mechanical, Packaging, and Orderable Information

UCC28750 Current-Mode Flyback Controller with Secondary-Side Regulation (SSR) for Off-Line Applications