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

5 UCC21520 Driving Different Power Topologies

The flexible, universal capability of the UCC21520 with up to 18-V VCCI and 25-V VDDA/VDDB allows the device to be used as a low-side, high-side, high-side/low-side or half-bridge driver with MOSFETs, IGBTs or SiC MOSFETs. Here are some topology examples where the UCC21520 can fit very well. Synchronous buck or boost is shown in Figure 18 and Figure 19; full bridge isolated converter is shown in Figure 20; Motor drives application is shown in Figure 21.

SLUA778_fig18.gifFigure 18. UCC21520 Used in Synchronous Buck
SLUA778_fig19.gifFigure 19. UCC21520 Used in Synchronous Boost
SLUA778_fig20.gifFigure 20. UCC21520 Used in Full-Bridge Isolated Converter
SLUA778_fig21.gifFigure 21. UCC21520 Used in Motor Drives