TIDUEZ3A April   2021  – June 2022

 

  1.   Description
  2.   Resources
  3.   Features
  4.   Applications
  5.   5
  6. 1System Description
  7. 2System Overview
    1. 2.1 Block Diagram
    2. 2.2 Design Considerations
    3. 2.3 Highlighted Products
      1. 2.3.1 LMG342xR030
      2. 2.3.2 TMS320F28002x
      3. 2.3.3 OPA607
      4. 2.3.4 UCC21222
  8. 3Hardware, Testing Requirements, and Test Results
    1. 3.1 Hardware Requirements
    2. 3.2 Test Setup
    3. 3.3 Test Results
      1. 3.3.1 Test Procedures
      2. 3.3.2 Performance Data: Efficiency, iTHD, and Power Factor
      3. 3.3.3 Functional Waveforms
        1. 3.3.3.1 Current Sensing and Protection
        2. 3.3.3.2 Power Stage Startup and Input Waveforms
        3. 3.3.3.3 AC Drop Test
        4. 3.3.3.4 Surge Test
        5. 3.3.3.5 EMI Test
      4. 3.3.4 Thermal Test
      5. 3.3.5 GaN FET Switching Waveform
  9. 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
  10. 5About the Author
  11. 6Revision History

Test Setup

This reference design includes a flyback stage which provides two 12 VDC with 600-V functional isolation for independent operation. But, during the firmware test process, the setup with an axillary power board is not expected, because no power is expected to exist on the DC bus when operating the firmware.

The following steps show the common setup with external VCC power supply:

  1. Remove or disconnect the flyback board, if it is assembled
  2. Make sure C2000 and GaN board is well assembled
  3. Connect 12VDC1 to ‘12Vc’ and ‘GND-c’; Connect another 12VDC2 to ‘12V-L’ & ‘B-’; (12VDC1 and 12VDC2 must have 500 VDC isolation ability to each other)
  4. Connect the AC source cable to the input terminal, but do not power up
  5. Connect the DC load to output terminal (pay attention for the DC polarity. And, the load must be isolated with grid and PE line)
  6. Use forced-air cooling fan to cool the board
  7. Insert power meter with current and voltage meter, before testing efficiency. (Make sure all voltage probes are near to the board side.)

GUID-20210309-CA0I-CXQL-GH1B-QW6LBPVFM5HH-low.jpg

Figure 3-1 Board Setup