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

7.3.4.5 Overpower Protection

The Over Power Protection, OPP, limits the maximum average output power. When the output is overloaded, shutdown the module to prevent further damage, or propagating the fault into other portion of the entire system. Given the extremely high-switching frequency, the traditional cycle-by-cycle current limit is not practical to implement. Instead, the UCC14341-Q1 device relies on the Over Power Protection (OPP) working together with the output undervoltage protection.

As discussed in Power Handling Capability, with the input voltage feedforward, and the "baby" burst duty cycle adjustment, the maximum power delivery capability of the UCC14341-Q1 is well controlled. The impact of OPP on the relationship between Vin and maximum output power is shown in Figure 7-8.

GUID-B5F5EA22-A16C-4B97-AE6F-55AD7A031CC5-low.svg Figure 7-8 Maximum Output Power Under Different Input Voltage Condition

When the load exceeds the maximum power delivery capability, the output voltage starts to droop. When the output voltage falls below the Under Voltage Protection threshold, the output undervoltage protection is triggered and the parts latches off into a safe state.