SLUSD31F October   2018  – July 2026 UCC23513

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Pin Configuration and Function
  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 Insulation Characteristics Curves
    12. 5.12 Typical Characteristics
  7. 6 Parameter Measurement Information
    1. 6.1 Propagation Delay, Rise Time and Fall Time
    2. 6.2 IOH and IOL testing
    3. 6.3 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 Power Supply
      2. 7.3.2 Input Stage
      3. 7.3.3 Output Stage
      4. 7.3.4 Protection Features
        1. 7.3.4.1 Undervoltage Lockout (UVLO)
        2. 7.3.4.2 Active Pulldown
        3. 7.3.4.3 Short-Circuit Clamping
    4. 7.4 Device Functional Modes
      1. 7.4.1 ESD Structure
  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 Selecting the Input Resistor
        2. 8.2.2.2 Gate Driver Output Resistor
        3. 8.2.2.3 Estimate Gate-Driver Power Loss
          1. 8.2.2.3.1 Case 1 - Linear Pull-Up and Pull-Down Resistor
          2. 8.2.2.3.2 Case 2 - Nonlinear pull-up and pull-down Resistor
        4. 8.2.2.4 Estimating Junction Temperature
        5. 8.2.2.5 Selecting VCC Capacitor
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
      3. 8.4.3 PCB Material
  10. 9 Device and Documentation Support
    1. 9.1 Documentation Support
      1. 9.1.1 Related Documentation
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

8.1 Application Information

UCC23513 is a single channel, isolated gate driver with opto-compatible input for power semiconductor devices, such as MOSFETs, IGBTs, or SiC MOSFETs. Use UCC23513 in applications such as motor control, industrial inverters, and switched-mode power supplies. It differs from standard opto isolated gate drivers as it does not have an LED input stage. Instead of an LED, it has an emulated diode (e-diode). To turn the e-diode "ON", a forward current in the range from 7mA to 16mA must be driven into the Anode. This drives the gate driver output High and turn on the power FET. Typically, MCUs cannot provide the required forward current. Hence use a buffer between the MCU and the input stage of UCC23513. Typical buffer power supplies are either 5V or 3.3V. A resistor is needed between the buffer and the input stage of the UCC23513 to limit the current. Selecting the correct value of resistance is both simple and important. Consider the resistor tolerance, buffer supply voltage tolerance, and output impedance of the buffer, in the resistor selection. Considering these variables verifies that the e-diode forward current stays within the recommended range from 7mA to 16mA. Detailed design recommendations are in Section 8.1. The current driven input stage offers excellent noise immunity that is needed in high power motor drive systems, especially in cases where the MCU cannot be located close to the isolated gate driver. UCC23513 offers best in class CMTI performance of >150kV/us at 1500V common mode voltages.

The e-diode is capable of 25mA continuous in the forward direction. The forward voltage drop of the e-diode has a very tight part to part variation (1.8V minimum to 2.4V maximum). The temperature coefficient of the forward drop is <1.35mV/°C. The dynamic impedance of the e-diode in the forward biased region is approximately 1Ω. All of these factors contribute in excellent stability of the e-diode forward current. To turn the e-diode "OFF", the Anode - Cathode voltage must be <0.8V, or IF must be <IFLH. The e-diode can also be reverse biased up to 13V (14V absolute maximum) to turn it off and bring the gate driver output low. The large reverse breakdown voltage of the input stage provides system designers the flexibility to drive the input stage with 12V PWM signals without the need for an additional clamping circuit on the Anode and Cathode pin.

The output power supply for UCC23513 can be as high as 33V (35V absolute maximum). Externally configure the output power supply as an isolated supply up to 33V or isolated bipolar supply such that VCC-VEE does not exceed 33V, or it can be bootstrapped (with external diode and capacitor) if the system uses a single power supply with respect to the power ground. Typical quiescent power supply current from VCC is 1.2mA (maximum 2.2mA).