SLUSF91 December   2025 UCC23710

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  Power Ratings
    6. 5.6  Insulation Specifications
    7. 5.7  Safety-Related Certifications
    8. 5.8  Safety Limiting Values
    9. 5.9  Electrical Characteristics
    10. 5.10 Switching Characteristics
    11. 5.11 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  Power Supplies
      2. 6.3.2  VDD Undervoltage Lockout (UVLO)
      3. 6.3.3  Opto-Emulated Input
      4. 6.3.4  Driver Stage
      5. 6.3.5  Active Pulldown
      6. 6.3.6  Short Circuit Clamping
      7. 6.3.7  Internal Active Miller Clamp
      8. 6.3.8  Desaturation (DESAT) Protection
      9. 6.3.9  Soft Turn Off (STO)
      10. 6.3.10 Fault (FLT) and Reset
    4. 6.4 Device Functional Modes
  8. 7 Applications 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 the Input Resistor
        2. 7.2.2.2 Gate Driver Output Resistor
        3. 7.2.2.3 FLT Output
        4. 7.2.2.4 Estimate Gate-Driver Power Loss
        5. 7.2.2.5 Selecting VDD Capacitor
        6. 7.2.2.6 Overcurrent and Short Circuit Protection
      3. 7.2.3 Application Curve
    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. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 Receiving Notification of Documentation Updates
    4. 8.4 Support Resources
    5. 8.5 Trademarks
    6. 8.6 Electrostatic Discharge Caution
    7. 8.7 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

7.2.2.1 Selecting the Input Resistor

The input resistor limits the current that flows into the e-diode when it is forward biased. The threshold current IFLH is 1mA typ. The recommended operating range for the forward current is 5mA to 20mA (e-diode ON). All the electrical specifications are ensured in this range. The resistor should be selected such that for typical operating conditions, IF is 10mA. Following are the list of factors that will affect the exact value of this current:

  1. Supply voltage VSUP variation
  2. Manufacturer's tolerance for the resistor and variation due to temperature
  3. e-diode forward voltage drop variation (at IF=10mA, VF= typ 1.7V, min 1.4V, max 2V, with a temperature coefficient < 0.7mV/°C and dynamic impedance < 1Ω)

See Figure 7-2 for the schematic using a single buffer and anode resistor combination to drive the input stage of the UCC23710. The input resistor can be selected using Table 7-2. For best CMTI performance, connect Cathode to ground.

UCC23710 Driving the Input Stage with One Buffer and Anode Resistor Figure 7-2 Driving the Input Stage with One Buffer and Anode Resistor
Table 7-2 REXT Values to Drive the Input Stage
REXT Ω

Configuration

 Min Typ Max
Single buffer and REXT 115 312 757