TIDUFG9 December   2025

1.   1
2.   Description
3.   Resources
4.   Features
5.   Applications
6.   6
7. 1System Description
   1. 1.1 Key System Specifications
8. 2System Overview
   1. 2.1 Block Diagram
   2. 2.2 Design Considerations
      1. 2.2.1 Switching Pattern of a 3-Level Flying Capacitor Switching Cell
      2. 2.2.2 Power Switching Devices Selection and Cooling Approach
      3. 2.2.3 Boost Inductor Selection
      4. 2.2.4 Flying Capacitor Selection
      5. 2.2.5 Cx Capacitance Selection
      6. 2.2.6 DC-Link Output Capacitance Selection
   3. 2.3 Highlighted Products
      1. 2.3.1 LMG3522R030 - 650V, 30mΩ GaN FET With Integrated Driver
      2. 2.3.2 TMDSCNCD28P55X - controlCARD Evaluation Module
         1. 2.3.2.1 Hardware Features
         2. 2.3.2.2 Software Features
      3. 2.3.3 TMCS1126 - Precision 500kHz Hall-Effect Current Sensor With Reinforced Isolation
      4. 2.3.4 UCC33421-Q1 Ultra-Small, 1.5W, 5.0V, 5kVRMS Isolation, DC/DC Module
9. 3Hardware, Software, Testing Requirements, and Test Results
   1. 3.1 Hardware Requirements
   2. 3.2 Test Setup
      1. 3.2.1 Testing TIDA-010957 Connected to the Grid With DC-Link
   3. 3.3 Test Results
      1. 3.3.1 Testing TIDA-010957 Connected to the Grid With DC-Link: Balanced Currents
         1. 3.3.1.1 Nominal Apparent Power
         2. 3.3.1.2 Efficiency vs Power vs DC-Link Voltage
            1. 3.3.1.2.1 Testing the Converter at 700VDC at 400VAC
            2. 3.3.1.2.2 Testing the Converter at 800VDC at 400VAC
            3. 3.3.1.2.3 Testing the Converter at 900VDC at 400VAC
            4. 3.3.1.2.4 Testing the Converter at 800VDC at 480VAC
      2. 3.3.2 Testing TIDA-010957 Tied to the Grid With DC-Link: Unbalance Currents
10. 4Design and Documentation Support
    1. 4.1 Design Files
       1. 4.1.1 Schematics
       2. 4.1.2 BOM
    2. 4.2 Documentation Support
    3. 4.3 Support Resources
    4. 4.4 Trademarks
11. 5About the Author

15kW, Bidirectional, Three-Phase Plus Neutral Flying Capacitor Based on GaN Reference Design