SLUUCE8A February   2021  – October 2021 UCC25800-Q1

 

  1.   Trademarks
  2. Description
  3. Electrical Performance Specifications
  4. Schematic Diagram
  5. Description - How to Use
    1. 4.1 Typical Applications
    2. 4.2 Using the EVM with on-board Pre-regulator on Board
    3. 4.3 Using the EVM with an External DC Voltage Source
  6. Test Setup
    1. 5.1 Test Setup Requirements
    2. 5.2 Test Setup Diagram
    3. 5.3 Test Points and Input / Output Terminals
  7. Performance Data and Typical Characteristic Curves
    1. 6.1  Efficiency Result of the LLC Board with External DC Input Voltage
    2. 6.2  Efficiency Result of the LLC Board with Pre-regulator on Board
    3. 6.3  Efficiency Typical Results
    4. 6.4  Output Characteristics
    5. 6.5  Output Voltage Turn-on at Start Up
    6. 6.6  Output Ripple Voltage
    7. 6.7  Frequency Synchronized to External Signal
    8. 6.8  DIS-pin Enable and Dis-Enable
    9. 6.9  Load Transient Response
    10. 6.10 Switch-node Voltage and Current
    11. 6.11 Over-Current Limit and FLT-pin
    12. 6.12 CISPR-25 Class-5 Conducted EMI Test Result - Pass
    13. 6.13 Thermal Images at Full Load
  8. Transformer Details
  9. EVM Assembly and Layout
  10. List of Materials
  11. 10Revision History

CISPR-25 Class-5 Conducted EMI Test Result - Pass

The LLC board EMI test results present a pass in terms of CISPR-25 Class-5 Conducted EMI Peak Limits. The results shown in the below figures are based on the LLC board with L1, D5, R4 and R23 removed, and connect L3 (pin 3 and 4) to J2 and J1. The connection from L3 to J2 and J1 is through a twisted pair of wires.

GUID-C86B3C69-7BFC-4D52-872A-B50A91C6AACD-low.pngFigure 6-19 Peak Limits on Positive Polarity (LLC Board), Pass
GUID-247F2DA2-A9A7-4058-8306-0EA204A3692D-low.pngFigure 6-20 Peak Limits on Negative Polarity (LLC Board), Pass
Note:

Please note this was evaluated on an EMI station for pre-qualification purpose only. It is recommended that all final designs be verified by an agency-qualified EMI test house.