SLUSEX2A September   2025  – September 2025 UCC27734 , UCC27735

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 Dynamic Electrical Characteristics
    7. 5.7 Timing Diagrams
    8. 5.8 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 Input Stages and Interlock
      2. 6.3.2 Enable Function (UCC277x5 Only)
      3. 6.3.3 Undervoltage Lockout (UVLO)
      4. 6.3.4 Level Shifter
      5. 6.3.5 Output Stage
      6. 6.3.6 Low Propagation Delays and Tightly Matched Outputs
      7. 6.3.7 HS Node dV/dt
      8. 6.3.8 Split Grounds (COM and VSS)
      9. 6.3.9 Operation Under Negative HS Voltage Condition
    4. 6.4 Device Functional Modes
      1. 6.4.1 Input and Output Logic Table
      2. 6.4.2 Operation Under 100% Duty Cycle Condition
  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 Selecting HI and LI Low Pass Filter Components (RHI, RLI, CHI, CLI)
        2. 7.2.2.2 Selecting Bootstrap Capacitor (CBOOT)
        3. 7.2.2.3 Selecting VDD Bypass Capacitor (CVDD)
        4. 7.2.2.4 Selecting Bootstrap Resistor (RBOOT)
        5. 7.2.2.5 Selecting Gate Resistor RHO/RLO
        6. 7.2.2.6 Selecting Bootstrap Diode
        7. 7.2.2.7 Estimate the UCC2773x Power Losses
        8. 7.2.2.8 Application Example Schematic Note
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Third-Party Products Disclaimer
      2. 8.1.2 Development Support
    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

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7.2.1 Design Requirements

Table 7-1 shows the design requirements for a 600W power supply used as an example to illustrate the design process.

Table 7-1 UCC2773x Design Requirements
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
INPUT CHARACTERISTICS
DC input voltage range370390410V
IIN(max)Maximum input currentVIN= 370VDC to 410VDC2A
OUTPUT CHARACTERISTICS
VOUTOutput voltageVIN = 370VDC to 410VDC11.41212.6V
IOUTOutput currentVIN = 370VDC to 410VDC50A
POUTContinuous output powerVIN = 370VDC to 410VDC600W