STMicroelectronics 400 W FOT-controlled PFC pre-regulator with the L6563S EVL6563S-400W EVL6563S-400W Datenbogen
Produktcode
EVL6563S-400W
AN2994
Thermal measures
Doc ID 15796 Rev 2
29/38
5 Thermal
measures
To verify the reliability of the design, a thermal mapping by means of an IR camera has been
done.
done.
show the thermal measurements on the board component
side at nominal input voltages and full load. Pointers (visible on the images) placed across
the key components show the relevant temperature.
the key components show the relevant temperature.
between the measured points and the components, for both thermal maps. The ambient
temperature during both measurements was 27°C. According to the results obtained, all the
board components are operating within their temperature limits.
temperature during both measurements was 27°C. According to the results obtained, all the
board components are operating within their temperature limits.
Figure 38.
Thermal map at 115 Vac, 60 Hz - full load
Figure 39.
Thermal map at 230 Vac, 50 Hz - full load
Table 1.
Measured temperature at 115 Vac and 230 Vac - full load
Point
Component
Temperature at 115 Vac
Temperature at 230 Vac
A
D2
57.3 °C
42.3 °C
B
Q2
62.2 °C
48.6 °C
C
Q1
62.4 °C
48.3 °C
D
D3
60.2 °C
47.8 °C
E
C7
38.2 °C
35.4 °C
F
L1
53.4 °C
37.2 °C
G
L3
55.1 °C
40.1 °C
H
L4 – CORE
61.8 °C
49.3 °C
I
L4 – WINDING
68.7 °C
52.8 °C