TIDT366 November 2023
2.3 Thermal Images
Table 2-1 shows the thermal images, all images were captured with 25ºC ambient, after 30-minute warm up
Table 2-1 Thermal Image Data
| Temperature (°C) | 300 VIN | 600 VIN | 800 VIN | 1000 VIN |
|---|---|---|---|---|
| High-side switch Q1 | 61.8 |
56.7 |
54.5 |
55.1 |
| Low-side switch Q2 |
50.1 |
47.5 |
46.3 |
47.5 |
| Transformer |
Core: 56.8 Winding: 64.3 |
Core: 58.2 Winding: 65.3 |
Core: 58.9 Winding: 66.2 |
Core: 60.2 Winding: 67.4 |
| Snubber circuit resistor R16, R17, R18 |
65 |
64.7 |
65.2 |
67.6 |
| Snubber circuit clamp diode D1 and D2 |
60.8 |
61.4 |
62.3 |
63.4 |
| Snubber circuit clamp diode D1 and D2 |
60.8 |
61.4 |
62.3 |
63.4 |
| Snubber circuit Clamp TVS D22 |
53.5 |
55.6 |
57.6 |
58.9 |
| TVS diode D6 and D10 |
40.5 |
46.2 |
54.5 |
61.5 |
| Secondary diode D7 |
77.9 |
78.5 |
78.8 |
79.2 |
| UCC28730 |
40.5 |
40.6 |
40.6 |
40.8 |
| UCC24650 |
50.3 |
53.4 |
54.5 |
56.3 |
Figure 3-64 through Figure 2-11 show the thermal image data.
Figure 2-4 Thermal Image 300
VIN 12 V, 4-A Load Top View
Figure 2-6 Thermal Image 600
VIN 12 V, 4-A Load Top View
Figure 2-8 Thermal Image 800
VIN 12 V, 4-A Load Top View
Figure 2-10 Thermal Image 1000
VIN 12 V,4-A Load Top View
Figure 2-5 Thermal Image 300
VIN 12 V, 4-A Load Bottom View
Figure 2-7 Thermal Image 600
VIN 12 V, 4-A Load Bottom View
Figure 2-9 Thermal Image 800
VIN 12 V, 4-A Load Bottom View
Figure 2-11 Thermal Image 1000
VIN 12 V, 4-A Load Bottom View