Technical Reference Note
Operating Temperature
Rev.02.06.15_#1.2
AVO75B-36S3V3
Page 14
The AVO75B-36S3V3 series power supplies will start and operate within stated specifications at an ambient temperature
from -40 OC to 85 OC under all load conditions. The storage temperature is -40 OC to 85 OC.
Thermal Considerations – Open-Frame module
The converter is designed to operate in different thermal environments and sufficient cooling must be provided. Proper
cooling can be verifiedby measuring the temperature at the test points as shown in the Figure 12. The temperature at
these test points should not exceed the maximum values in Table 6.
For a typical application, forced airflow direction is from pin 3 to pin1. Figure 13, 14 shows the derating of output current vs.
ambient air temperature at different air velocity. Figure 15 shows the thermal image taken by a RF camera at a rated I/O
condition.
.
Figure 12 Temperature test point
Table 6. Temperature limit of the test point
Test Point
Temperature Limit
125 OC
.
P1
P2
125 OC
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