SLUSET9I December   2022  – December 2025 UCC21551-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  ESD Ratings (Automotive)
   3. 5.3  Recommended Operating Conditions
   4. 5.4  Thermal Information
   5. 5.5  Power Ratings
   6. 5.6  Insulation Specifications
   7. 5.7  Safety Limiting Values
   8. 5.8  Electrical Characteristics
   9. 5.9  Switching Characteristics
   10. 5.10 Insulation Characteristics Curves
   11. 5.11 Typical Characteristics
7. 6 Parameter Measurement Information
   1. 6.1 Propagation Delay and Pulse Width Distortion
   2. 6.2 Rising and Falling Time
   3. 6.3 Input and Enable Response Time
   4. 6.4 Programmable Dead Time
   5. 6.5 Power-up UVLO Delay to OUTPUT
   6. 6.6 CMTI Testing
8. 7 Detailed Description
   1. 7.1 Overview
   2. 7.2 Functional Block Diagram
   3. 7.3 Feature Description
      1. 7.3.1 VDD, VCCI, and Undervoltage Lock Out (UVLO)
      2. 7.3.2 Input and Output Logic Table
      3. 7.3.3 Input Stage
      4. 7.3.4 Output Stage
      5. 7.3.5 Diode Structure in the UCC21551x-Q1
   4. 7.4 Device Functional Modes
      1. 7.4.1 Enable Pin
      2. 7.4.2 Programmable Dead-Time (DT) Pin
         1. 7.4.2.1 Tying the DT Pin to VCC
         2. 7.4.2.2 DT Pin Connected to a Programming Resistor Between DT and GND Pins
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 Designing INA/INB Input Filter
         2. 8.2.2.2 Select External Bootstrap Diode and its Series Resistor
         3. 8.2.2.3 Gate Driver Output Resistor
         4. 8.2.2.4 Gate to Source Resistor Selection
         5. 8.2.2.5 Estimate Gate Driver Power Loss
         6. 8.2.2.6 Estimating Junction Temperature
         7. 8.2.2.7 Selecting VCCI, VDDA/B Capacitor
            1. 8.2.2.7.1 Selecting a VCCI Capacitor
            2. 8.2.2.7.2 Selecting a VDDA (Bootstrap) Capacitor
            3. 8.2.2.7.3 Select a VDDB Capacitor
         8. 8.2.2.8 Dead Time Setting Guidelines
         9. 8.2.2.9 Application Circuits with Output Stage Negative Bias
      3. 8.2.3 Application Curves
10. 9 Power Supply Recommendations
11. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
12. 11Device and Documentation Support
    1. 11.1 Device Support
       1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Documentation Support
       1. 11.2.1 Related Documentation
    3. 11.3 Certifications
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Support Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
13. 12Revision History
14. 13Mechanical, Packaging, and Orderable Information
    1. 13.1 Tape and Reel Information