SLUSEU7A August   2023  – September 2023 UCC14130-Q1

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Revision History
  6. 5 Device Comparison
  7. 6 Pin Configuration and Functions
  8. 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 Insulation Specifications
    6. 7.6 Electrical Characteristics
    7. 7.7 Safety Limiting Values
  9. 8 Safety-Related Certifications
  10. 9 Insulation Characteristics
  11. 10Typical Characteristics
  12. 11Detailed Description
    1. 11.1 Overview
    2. 11.2 Functional Block Diagram
    3. 11.3 Feature Description
      1. 11.3.1 Power Stage Operation
        1. 11.3.1.1 VDD-VEE Voltage Regulation
        2. 11.3.1.2 COM-VEE Voltage Regulation
        3. 11.3.1.3 Power Handling Capability
      2. 11.3.2 Output Voltage Soft Start
      3. 11.3.3 ENA and PG
      4. 11.3.4 Protection Functions
        1. 11.3.4.1 Input Undervoltage Lockout
        2. 11.3.4.2 Input Overvoltage Lockout
        3. 11.3.4.3 Output Undervoltage Protection
        4. 11.3.4.4 Output Overvoltage Protection
        5. 11.3.4.5 Overpower Protection
        6. 11.3.4.6 Overtemperature Protection
    4. 11.4 Device Functional Modes
  13. 12Application and Implementation
    1. 12.1 Application Information
    2. 12.2 Typical Application
      1. 12.2.1 Design Requirements
      2. 12.2.2 Detailed Design Procedure
        1. 12.2.2.1 Capacitor Selection
        2. 12.2.2.2 Single RLIM Resistor Selection
        3. 12.2.2.3 RDR Circuit Component Selection
        4. 12.2.2.4 Feedback Resistors Selection
    3. 12.3 System Examples
  14. 13Power Supply Recommendations
  15. 14Layout
    1. 14.1 Layout Guidelines
    2. 14.2 Layout Example
  16. 15Device and Documentation Support
    1. 15.1 Documentation Support
      1. 15.1.1 Related Documentation
    2. 15.2 Receiving Notification of Documentation Updates
    3. 15.3 Support Resources
    4. 15.4 Trademarks
    5. 15.5 Electrostatic Discharge Caution
    6. 15.6 Glossary
  17. 16Mechanical, Packaging, and Orderable Information
  18. 17Tape and Reel Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

11.3.4.1 Input Undervoltage Lockout

UCC1413x-Q1 can take wide input voltage range, from 10 V to 18 V. When the input voltage becomes too low, the output either cannot be regulated due to the transformer turns ratio limitation, or the converter operates with too much current stress. Either way, the converter must shut down to protect the system.

The UCC1413x-Q1 enters input undervoltage lockout when VVIN voltage becomes lower than the UVLO threshold VVIN_UVLOP_FALLING. In UVLO mode, the converter stops switching. After VIN pin voltage becomes lower than the VIN analog undervoltage lockout falling threshold VVIN_VULOP_FALLING , UCC1413x-Q1 resets all the protections. After that, after the VVIN voltage becomes above the UVLO threshold VVIN_UVLOP_RISING, the converter is enabled. Depending on the ENA pin voltage, the converter can start switching, go through the soft-start process, or in the disable mode, waiting for ENA pin voltage becomes high.