TIDT422 June 2025
2.4 Thermal Images
Thermal images are shown in Figure 2-9 through Figure 2-12. Thermal test was performed at room temperature, open frame, with 30-minute warm up.
Table 2-4 Thermal Test at 20V, Full-Load Condition
|
Temperature(oC) |
90VAC |
115VAC |
230VAC |
264VAC |
|---|---|---|---|---|
|
AC Bridge |
77.5 |
70.1 |
65.3 |
64.9 |
|
UCG28826 |
69.2 |
66.2 |
75.2 |
82.2 |
|
Transformer |
83.4 |
80.8 |
85.5 |
86.5 |
|
SR MOSFET |
73.5 |
74.1 |
74.8 |
76.2 |
|
SR Controller |
80.4 |
80.2 |
81.3 |
82.2 |
|
RCD Snubber |
67.8 |
66.2 |
64.2 |
63.5 |
Figure 2-9 90VAC, 20V, 2.25A
Figure 2-10 115VAC, 20V, 2.25A
Figure 2-11 230VAC, 20V, 2.25A
Figure 2-12 264VAC, 20V, 2.25A