GE Industrial Solutions 12V Mega TLynx - Manual (Page 16)

Data Sheet
May 4, 2012 12V Mega TLynx TM : Non-Isolated DC-DC Power Modules:
6.0 – 14Vdc Input; 0.8Vdc to 3.63Vdc Output; 30A output current
LINEAGE POWER 16
Thermal Considerations
Power modules operate in a variety of thermal
environments; however, sufficient cooling should
always 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 presented here is
based on physical measurements taken in a wind
tunnel. The test set-up is shown in Figure 35. Note
that the airflow is parallel to the short axis of the
module as shown in Figure 36. The derating data
applies to airflow in either direction of the module’s
short axis.
Figure 35. Thermal Test Setup.
The thermal reference points, T
ref
used in the
specifications is shown in Figure 36. For reliable
operation the temperatures at this point should not
exceed 130 o C. The output power of the module
should not exceed the rated power of the module
(Vo,set x Io,max).
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.
Figure 36. Preferred airflow direction and location of
hot-spot of the module (Tref).
Air
flow
x
Power Module
Wind Tunnel
PWBs
12.7_
(0.50)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)
AIRFLOW
DIRECTION
Q6 & L2 Tref