TIDT368 August   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5. 1Test Prerequisites
    1. 1.1 Voltage and Current Requirements
    2. 1.2 Required Equipment
    3. 1.3 Considerations
    4. 1.4 Dimensions
    5. 1.5 Test Setup
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs
    2. 2.2 Efficiency Data
    3. 2.3 Output Voltage Regulation Graphs
    4. 2.4 Thermal Images
    5. 2.5 EMI
  7. 3Waveforms
    1. 3.1 Switching
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Output Voltage Start-Up Sequence
    5. 3.5 Overcurrent Protection (OCP)
    6. 3.6 Short-Circuit Protection (SCP)

2.4 Thermal Images

Table 2-5 shows the temperature data with 25ºC ambient after a 30-minute warm up.

Table 2-5 Temperature Data
TEMPERATURE (°C) TEST CONDITION FULL LOAD
115VAC 230VAC
Primary switch 90.5 87.8
Secondary diode 59 60
Transformer 62.2 60.3
Bridge 50 49
UCC28740 36 36
LMR33620ADDAR 76 75

Figure 2-4 and Figure 2-5 show the thermal images, all images were captured with 25ºC ambient, after a 30-minute warm up.

PMP41015 Thermal Image at 115VAC, Full LoadFigure 2-4 Thermal Image at 115VAC, Full Load
PMP41015 Thermal Image at 230VAC, Full LoadFigure 2-5 Thermal Image at 230VAC, Full Load