SLUSC82B April   2017  – July 2026 UCC24630

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Start Up and UVLO
      2. 6.3.2 Volt-Sec SR Driver On-Time Control
      3. 6.3.3 CCM Dead Time
      4. 6.3.4 Standby Operation
      5. 6.3.5 Pin Fault Protection
        1. 6.3.5.1 VPC Pin Overvoltage
        2. 6.3.5.2 VPC Pin Open
        3. 6.3.5.3 VSC Pin Open
        4. 6.3.5.4 TBLK Pin Open
        5. 6.3.5.5 VPC and VSC Short to Ground
        6. 6.3.5.6 TBLK Pin Short to Ground
    4. 6.4 Device Functional Modes
      1. 6.4.1 Start-Up
      2. 6.4.2 Normal Operation
      3. 6.4.3 Standby Operation
      4. 6.4.4 Conditions to Stop Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 AC-to-DC Adapter, 19.5V, 65W
      2. 7.2.2 Design Requirements
      3. 7.2.3 Calculation of Component Values
        1. 7.2.3.1 VPC Input
        2. 7.2.3.2 VSC Input
        3. 7.2.3.3 TBLK Input
      4. 7.2.4 Application Curves
    3. 7.3 Best Design Practices
    4. 7.4 Power Supply Recommendations
    5. 7.5 Layout
      1. 7.5.1 Layout Guidelines
        1. 7.5.1.1 VDD Pin
        2. 7.5.1.2 VPC Pin
        3. 7.5.1.3 VSC Pin
        4. 7.5.1.4 GND Pin
        5. 7.5.1.5 TBLK Pin
        6. 7.5.1.6 DRV Pin
      2. 7.5.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
        1. 8.1.1.1 Definition of Terms
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.5.1.4 GND Pin

The GND pin is the power and signal ground connection for the controller. The effectiveness of the filter capacitors on the signal pins depends upon the integrity of the ground return. Place all decoupling capacitors as close as possible to the device pins with short traces. The device ground and power ground should meet at the output bulk capacitor’s return. Try to verify that high frequency/high current from the power stage does not go through the signal ground.