SGLS245F May   2004  – April 2025 UCC2813-0-Q1 , UCC2813-1-Q1 , UCC2813-2-Q1 , UCC2813-3-Q1 , UCC2813-4-Q1 , UCC2813-5-Q1

PRODUCTION DATA  

1.   1
2. 1 Features
3. 2 Applications
4. 3 Description
5. 4 Device Comparison Table
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 Typical Characteristics
8. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Feature Description
      1. 7.3.1  Detailed Pin Descriptions
         1. 7.3.1.1 COMP
         2. 7.3.1.2 CS
         3. 7.3.1.3 FB
         4. 7.3.1.4 GND
         5. 7.3.1.5 OUT
         6. 7.3.1.6 RC
         7. 7.3.1.7 REF
         8. 7.3.1.8 VCC
      2. 7.3.2  Undervoltage Lockout (UVLO)
      3. 7.3.3  Self-Biasing, Active Low Output
      4. 7.3.4  Reference Voltage
      5. 7.3.5  Oscillator
      6. 7.3.6  Synchronization
      7. 7.3.7  PWM Generator
      8. 7.3.8  Minimum Off-Time Adjustment (Dead-Time Control)
      9. 7.3.9  Leading Edge Blanking
      10. 7.3.10 Minimum Pulse Width
      11. 7.3.11 Current Limiting
      12. 7.3.12 Overcurrent Protection and Full-Cycle Restart
      13. 7.3.13 Soft Start
      14. 7.3.14 Slope Compensation
   4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 UVLO Mode
      3. 7.4.3 Soft-Start Mode
      4. 7.4.4 Fault Mode
9. 8 Application and Implementation
   1. 8.1 Application Information
   2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
         1. 8.2.2.1  Bulk Capacitor Calculation
         2. 8.2.2.2  Transformer Design
         3. 8.2.2.3  MOSFET and Output Diode Selection
         4. 8.2.2.4  Output Capacitor Calculation
         5. 8.2.2.5  Current Sensing Network
         6. 8.2.2.6  Gate Drive Resistor
         7. 8.2.2.7  REF Bypass Capacitor
         8. 8.2.2.8  RT and CT
         9. 8.2.2.9  Start-Up Circuit
         10. 8.2.2.10 Voltage Feedback Compensation Procedure
             1. 8.2.2.10.1 Power Stage Gain, Zeroes, and Poles
             2. 8.2.2.10.2 Compensating the Loop
      3. 8.2.3 Application Curves
   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 Related Links
    3. 9.3 Receiving Notification of Documentation Updates
    4. 9.4 Support Resources
    5. 9.5 Trademarks
    6. 9.6 Electrostatic Discharge Caution
    7. 9.7 Glossary
11. 10Revision History
12. 11Mechanical, Packaging, and Orderable Information

UCC2813-x-Q1 Automotive Low-Power Economy BiCMOS Current-Mode PWM