TIDT246 September   2021

 

  1. 1Description
  2. 2Test Prerequisites
    1. 2.1 Voltage and Current Requirements
    2. 2.2 Required Equipment
  3. 3Testing and Results
    1. 3.1 Efficiency and Power Dissipation Graphs
    2. 3.2 Efficiency and Power Dissipation Data
    3. 3.3 Thermal Performance
    4. 3.4 Bode Plot
    5. 3.5 Voltage Regulation
  4. 4Waveforms
    1. 4.1 Switching
    2. 4.2 Output Voltage Ripple
    3. 4.3 Start-up

Voltage Regulation

The voltage regulation of the LLC converter outputs is shown in the following figures.

GUID-20210720-CA0I-PHQ2-VG7H-CBDB0RXXFT08-low.pngFigure 3-10 3-W Rail Regulation Graph
GUID-20210720-CA0I-DK2B-81T1-1MVVZMPBPT1N-low.pngFigure 3-11 3-W Rail Regulation Table
GUID-20210720-CA0I-VSPX-QTXJ-HGXZK2FT3X3B-low.pngFigure 3-12 1-W Rail Regulation
GUID-20210720-CA0I-P0HP-9CD9-XN9ZL9BWVCGM-low.pngFigure 3-13 1-W Rail Regulation Table

The cross regulation was measured to showcase the effects of varying load on the other outputs of the LLC converter. The 3-W rail (Vo3W) and one of the 1-W rails (Vo1W3) were varied while the other 2 rails (Vo1W1 and Vo1W2) were held constant.

GUID-20210720-CA0I-Z0KR-BKLH-RLL2DZN3K4PT-low.pngFigure 3-14 Cross Regulation Table