SBAA586 October   2023 AMC23C11 , UCC23513

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2System Challenge on Isolated Gate Drivers With Integrated DESAT
  6. 3System Approach With UCC23513 and AMC23C11
    1. 3.1 System Overview and Key Specification
    2. 3.2 Schematic Design
      1. 3.2.1 Circuit Schematic
      2. 3.2.2 Configure VCE(DESAT) Threshold and DESAT Bias Current
      3. 3.2.3 DESAT Blanking Time
      4. 3.2.4 DESAT Deglitch Filter
    3. 3.3 Reference PCB Layout
  7. 4Simulation and Test Results
    1. 4.1 Simulation Circuit and Results
      1. 4.1.1 Simulation Circuit
      2. 4.1.2 Simulation Results
    2. 4.2 Test Results With 3-Phase IGBT Inverter
      1. 4.2.1 Brake IGBT Test
      2. 4.2.2 Test Results on a 3-Phase Inverter With Phase to Phase Short
  8. 5Summary
  9. 6References
  10. 7Revision History

Abstract

Reinforced isolated gate drivers are key components in 3-phase inverters for industrial motor drives, and DESAT is a popular approach for overcurrent protection (OCP) or short circuit protection (SCP) in these applications. This application note presents a small form factor, cost-optimized design based on the 6-pin opto-compatible reinforced isolated gate driver UCC23513 with a discrete DESAT implementation using the isolated comparator AMC23C11. This combination achieves a smaller PCB size and lower cost, compared to the 16-pin package smart gate drivers with integrated DESAT protection, and helps to enhance flexibility in applications of compact motor drives. The design also keeps the flexibility to configure the application parameters of the DESAT function.