Data Sheet
March 26, 2008
EUK240 Series Power Modules; DC-DC converters
36 – 60Vdc input; 9.6Vdc Output; 240W
Thermal Considerations
Power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation.
Considerations include ambient temperature, airflow,
module power dissipation, and the need for increased
reliability. A reduction in the operating temperature of
the module will result in an increase in reliability. The
thermal data is based on physical measurements
taken in a wind tunnel. The test set-up is shown in
Figure 18. The module delivers full power over an
input voltage range of 36V to 55V, at an ambient
o
temperature of 55 C, at the airflow rate of 200LFM
environment, at sea level, at 50 % relative humidity,
with specified orientation. For higher local ambient
temperature operation, the modules output power
should be derated, as shown in Figures 9 - 12.
Figure 19. Temperature Measurement Locations
Please refer to the Application Note “Thermal
Characterization Process For Open-Frame Board-
Mounted Power Modules” for a detailed discussion of
thermal aspects including maximum device
temperatures.
Wind Tunnel
PWBs
25.4
(1.0)
Power Module
76.2
(3.0)
x
6.55
(0.258)
Probe Location
for measuring
airflow and
ambient
temperature
Air
flow
Figure 18. Thermal Test Set up.
LINEAGE
POWER
9
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
