SNVS961E APRIL   2013  – January 2016 LM5023

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 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
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Detailed Pin Description
        1. 7.3.1.1 QR Pin
        2. 7.3.1.2 VSD Pin
        3. 7.3.1.3 SS Pin
        4. 7.3.1.4 COMP Pin
        5. 7.3.1.5 CS Pin
        6. 7.3.1.6 GND Pin
        7. 7.3.1.7 OUT Pin
        8. 7.3.1.8 VCC Pin
      2. 7.3.2 Start-Up
      3. 7.3.3 Quasi-Resonant Operation
      4. 7.3.4 Quasi-Resonant Operating Frequency
      5. 7.3.5 PWM Comparator
      6. 7.3.6 Soft-Start
      7. 7.3.7 Gate Driver
        1. 7.3.7.1 Skip-Cycle Operation
      8. 7.3.8 Current Limit and Current Sense
    4. 7.4 Device Functional Modes
  8. 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 Custom Design with WEBENCH Tools
        2. 8.2.2.2 Line Current-Limit Feedforward
          1. 8.2.2.2.1 Overvoltage Protection
        3. 8.2.2.3 Valley Switching
        4. 8.2.2.4 Hiccup Mode
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Custom Design with WEBENCH Tools
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

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4 Revision History

Changes from D Revision (January 2014) to E Revision

  • Added Pin Configuration and Functions section, ESD Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from C Revision (August, 2013) to D Revision

  • Added LM5023 Pin ConfigurationGo
  • Changed FUNCTIONAL BLOCK DIAGRAM.Go
  • Added VCC < VCC(on) the current consumption.Go
  • Changed IQR equation from ROFFSET to R1.Go
  • Changed Current Feed Forward resistor value from 1 kΩ to 6.6 kΩ.Go