TIDT226 April   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 Thermal Images
    2. 3.2 Efficiency and Power Dissipation Graph
    3. 3.3 Efficiency and Power Dissipation Data
    4. 3.4 Cross-Load Voltage Regulation
    5. 3.5 Voltage Regulation Graph
  4. 4Waveforms
    1. 4.1 Start-up Sequence
    2. 4.2 Switch Node
    3. 4.3 Output Voltage Ripple
    4. 4.4 Load Transients

3.1 Thermal Images

This thermal image shows the operating temperature of the top side of the board with a 24-VDC input and the
+20 V and –4 V at 200-mA output at room temperature and no air flow.

GUID-20210219-CA0I-BPKK-RQXH-50ZR5PQLGT4P-low.pngFigure 3-1 Top-Side Thermal Image With 200-mA Load
Measurement LocationTemperature (°C)
Sp141.7
Sp238.9
Sp344.6
Sp436.4

The following thermal image shows the operating temperature of the top side of the board with a 24-VDC input and the +20 V and –4 V at 100-mA output at room temperature and no air flow.

GUID-20210219-CA0I-BMFX-7GTK-PSQWQXRMBHPZ-low.pngFigure 3-2 Top-Side Thermal Image With 100-mA Load
Measurement LocationTemperature (°C)
Sp136.3
Sp230.4
Sp334.4
Sp430.7