TIDT446A June 2025 – July 2025
2.4 Thermal Images
The thermal test was performed at room temperature, open frame, with a 30-minute warm up.
Table 2-5 Thermal Test Data at 20V,
Full-Load Condition
| Temperature(oC) | 90VAC |
115VAC |
230VAC |
264VAC |
|
AC Bridge |
85.3 |
71.7 |
57.7 |
56.2 |
|
UCG28826 |
75.8 |
67.2 |
58.6 |
57.7 |
| Transformer |
76.2 |
77.2 |
82.2 |
82.9 |
| SR MOSFET |
78.5 |
77.8 |
81.6 |
82.2 |
| SR Controller |
80.9 |
81.2 |
87.3 |
88.9 |
| RCD Snubber |
69.2 |
68.5 |
66.3 |
65.4 |
Thermal image is shown in Figure 2-9 through Figure 2-12.
Figure 2-9 90VAC, 20V, 3.25A
Figure 2-11 230VAC, 20V, 3.25A
Figure 2-10 115VAC, 20V, 3.25A
Figure 2-12 264VAC, 20V, 3.25A