SLVSCO2B August   2014  – January 2024 UCC27511A-Q1

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 Handling Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Switching Characteristics
    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 VDD and Undervoltage Lockout
      2. 6.3.2 Operating Supply Current
      3. 6.3.3 Input Stage
      4. 6.3.4 Enable Function
      5. 6.3.5 Output Stage
      6. 6.3.6 Low Propagation Delays
    4. 6.4 Device Functional Modes
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input-to-Output Logic
        2. 7.2.2.2 Input Threshold Type
        3. 7.2.2.3 VDD Bias Supply Voltage
        4. 7.2.2.4 Peak Source and Sink Currents
        5. 7.2.2.5 Enable and Disable Function
        6. 7.2.2.6 Propagation Delay
        7. 7.2.2.7 Thermal Information
        8. 7.2.2.8 Power Dissipation
      3. 7.2.3 Application Curves
  9. 8 Power Supply Recommendations
  10. 9 Layout
    1. 9.1 Layout Guidelines
    2. 9.2 Layout Example
  11. 10Device and Documentation Support
    1. 10.1 Device Support
      1. 10.1.1 Third-Party Products Disclaimer
    2. 10.2 Receiving Notification of Documentation Updates
    3. 10.3 Support Resources
    4. 10.4 Trademarks
    5. 10.5 Electrostatic Discharge Caution
    6. 10.6 Glossary
  12. 11Revision History
  13. 12Mechanical, Packaging, and Orderable Information

Package Options

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

6.3.2 Operating Supply Current

The UCC27511A-Q1 device features very low quiescent IDD currents. The typical operating-supply current in undervoltage-lockout (UVLO) state and fully-on state (under static and switching conditions) are summarized in Figure 5-5, Figure 5-6 and Figure 5-7. The IDD current when the device is fully on and outputs are in a static state (DC high or DC low, refer Figure 5-7) represents lowest quiescent IDD current when all the internal logic circuits of the device are fully operational. The total supply current is the sum of the quiescent IDD current, the average IO current because of switching, and finally any current related to pullup resistors on the unused input pin. For example, when the inverting input pin is pulled low additional current is drawn from the VDD supply through the pullup resistors (see Section 6.2). Knowing the operating frequency (ƒS) and the MOSFET gate (QG) charge at the drive voltage being used, the average IO current can be calculated as product of QG and ƒS.

A complete characterization of the IDD current as a function of switching frequency at different VDD bias voltages under 1.8-nF switching load is provided in Figure 5-15. The strikingly linear variation and close correlation with the theoretical value of the average IO indicates negligible shoot-through inside the gate-driver device attesting to the high-speed characteristics.