SDAA195 January   2026 LMG3522R030

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
  5. 2Operating Principles in a Flying Capacitor Switching Cell
    1. 2.1 Switching Pattern of a 3-Level Flying Capacitor Switching Cell
  6. 3Design Considerations of a Flying Capacitor Switching Cell
    1. 3.1 Conduction and Switching Losses
      1. 3.1.1 AC Conduction Losses
      2. 3.1.2 AC Switching Losses
    2. 3.2 Passive Components Design
      1. 3.2.1 Boost Inductor Design
      2. 3.2.2 DC Link High Frequency Ripple
      3. 3.2.3 Flying Capacitor Design
    3. 3.3 Layout Considerations
    4. 3.4 Pre-Charging Network
  7. 4Experimental Results
    1. 4.1 Pre-charging of the Flying Capacitor of TIDA-010957
    2. 4.2 Steady State Operation
  8. 5Summary
  9. 6References

4 Experimental Results

In this chapter, experimental results of the reference design called TIDA-010957 are given [5]. This is a TI reference design rated for 15kVA based on TI GaN FETs (LMG3522R030) targeting three-phase plus neutral applications. This reference design can be connected to 900V DC link while still using 650V GaN transistors. Thanks to the integrated gate driver of the GaN FETs a switching speed of 70 kV/us is achieved. A schematic representation of the reference design can be found in Figure 4-1.

Schematic Representation of TIDA-010957 Reference Design Figure 4-1 Schematic Representation of TIDA-010957 Reference Design

It can be noticed that in this topology, four clone branches are implemented by having for all of them flying capacitor topology. Each switching cell of the converter is capable of handling 21Arms.