SLUA778A June   2016  – July 2016 UCC21520 , UCC21520-Q1 , UCC21540


  1.   UCC21520: A Universal Isolated Gate Driver with Fast Dynamic Response
    1.     Trademarks
    2. 1 Introduction
    3. 2 Internal Shoot-Through with Mismatched Propagation Delay
    4. 3 UCC21520 Dynamic Characteristics
    5. 4 Parallel UCC21520 Output Channels
      1. 4.1 UCC21520 Efficiently Drives Heavy Capacitive Loads by Paralleling its Output Channels
      2. 4.2 Schematic and PCB Layout Recommendations when Paralleling Output Channels
    6. 5 UCC21520 Driving Different Power Topologies
    7. 6 Summary
  2.   Revision History

UCC21520: A Universal Isolated Gate Driver with Fast Dynamic Response

Developed for high-voltage applications where isolation and reliability is required, the UCC21520 delivers reinforced isolation of 5.7 kVRMS along with a common mode transient immunity (CMTI) greater than 100 V/ns, and it has the industry’s best-in-class propagation delay of 19 ns and the best channel-to-channel delay matching of less than 5 ns which enables high switching frequency, high-power density and efficiency. In this application report, design considerations and benefits of the UCC21520’s fast dynamic response are introduced with discussion of its wide application in a great variety of power electronics topologies.