TIDT339 june   2023

 

  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 Testing Conditions
    4. 1.4 Considerations
    5. 1.5 Dimensions
  6. 2Testing and Results
    1. 2.1 Efficiency Graphs and Data
      1. 2.1.1 Efficiency Graph: Light Load Performance
      2. 2.1.2 Efficiency Graph: Available Output Power Versus Input Power
      3. 2.1.3 Efficiency Graph: Full Load Performance
      4. 2.1.4 Efficiency Data
        1.       17
        2.       18
        3.       19
    2. 2.2 Thermal Images
    3. 2.3 Static Output Voltage Variation versus Load
      1. 2.3.1 Light Load Range
      2. 2.3.2 Light to Full Load Range
    4. 2.4 EMI Measurement According to EN55022 Class-B Quasi-Peak Limits
  7. 3Waveforms
    1. 3.1 Switching on Q1 (VDS Voltage) at Full Load
    2. 3.2 Output Voltage Ripple
    3. 3.3 Load Transients
    4. 3.4 Start-Up and Shutdown Sequence
      1. 3.4.1 Start-Up Sequence
        1. 3.4.1.1 Load Current 0 A
        2. 3.4.1.2 Load Current 1.7 A
      2. 3.4.2 Shutdown Sequence

2.2 Thermal Images

Figure 2-4 and Table 2-4 show the thermal picture of the converter supplied at 230 VAC and 50 Hz, taken after 30 minutes soak time, at 25.5°C ambient temperature, and placed horizontally to the bench.

The board runs at 1.7 A under still air conditions.

GUID-20230622-SS0I-0HNL-GGNG-JBJW3CK8N8JB-low.png Figure 2-4 Thermal Image
Table 2-4 Main Image Markers
Name Temperature Emissivity Background
D2 59.1°C 0.96 25.5°C
D1 43.0°C 0.96 25.5°C
RT1 40.4°C 0.96 25.5°C
U2 45.9°C 0.96 25.5°C
Q1 48.9°C 0.96 25.5°C
T1 58.3°C 0.96 25.5°C
D4 68.3°C 0.96 25.5°C
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