SLUSF11C February   2023  – March 2024 UCC14341-Q1

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  Insulation Specifications
    6. 6.6  Electrical Characteristics
    7. 6.7  Safety Limiting Values
    8. 6.8  Safety-Related Certifications
    9. 6.9  Insulation Characteristics
    10. 6.10 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 Power Stage Operation
        1. 7.3.1.1 VDD-VEE Voltage Regulation
        2. 7.3.1.2 COM-VEE Voltage Regulation
        3. 7.3.1.3 Power Handling Capability
      2. 7.3.2 Output Voltage Soft Start
      3. 7.3.3 ENA and PG
      4. 7.3.4 Protection Functions
        1. 7.3.4.1 Input Undervoltage Lockout
        2. 7.3.4.2 Input Overvoltage Lockout
        3. 7.3.4.3 Output Undervoltage Protection
        4. 7.3.4.4 Output Overvoltage Protection
        5. 7.3.4.5 Overpower Protection
        6. 7.3.4.6 Over-Temperature Protection
    4. 7.4 Device Functional Modes
  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 Capacitor Selection
        2. 8.2.2.2 Single RLIM Resistor Selection
        3. 8.2.2.3 RDR Circuit Component Selection
        4. 8.2.2.4 Feedback Resistors Selection
    3. 8.3 System Examples
    4. 8.4 Power Supply Recommendations
    5. 8.5 Layout
      1. 8.5.1 Layout Guidelines
      2. 8.5.2 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
  13. 12Tape and Reel Information

Package Options

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

7.3.4.3 Output Undervoltage Protection

The output voltage under voltage protection is based on the FBVDD and FBVEE pin voltages. When the FBVDD pin voltage becomes lower than the UVP threshold VVDD_UVP_FALL, or the FBVEE pin voltage becomes lower than the UVP threshold VVEE_UVP_FALL, the undervoltage protection is activated. The UCC14341-Q1 stops switching, and the PG pin becomes open.

During soft start, the output voltages rise from zero. Both FBVDD and FBVEE pin voltage are below the UVP thresholds. The UVP is disabled during the soft start. If the pin voltage cannot reach the UVP recovery thresholds (VVDD_UVP_RISE, VVEE_UVP_RISE) after the soft start completes, undervoltage protection is activated. The UCC14341-Q1 stops switching, and the PG pin becomes open.

The undervoltage protection has a latched-off response. After activation, the latch-off state can be cleared by recycling VVIN. Toggling ENA pin can also reset the latch-off state. Refer to ENA and PG section for details.