GE Industrial Solutions 12V Austin SuperLynx 16A - Manual (Page 15)

GE
Data Sheet
12V Austin SuperLynx TM 16A: Non-Isolated DC-DC Power Modules
10Vdc –14Vdc input; 0.75Vdc to 5.5Vdc output; 16A Output Current
May 7, 2013 ©2013 General Electric Company. All rights reserved. Page 15
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 33. Note that the airflow is
parallel to the short axis of the module as shown in figure 32.
The derating data applies to airflow in either direction of the
module’s short axis.
Air Flow
T
ref
Top View
Bottom View
Figure 32. Tref Temperature measurement location.
The thermal reference point, T
ref
used in the specifications is
shown in Figure 32. For reliable operation this temperature
should not exceed 115
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 33. Thermal Test Set-up.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Thermal derating curves showing
the maximum output current that can be delivered at
different local ambient temperature (T
A
) for airflow
conditions ranging from natural convection and up to 2m/s
(400 ft./min) are shown in the Characteristics Curves section.
Air
flow
x
Power Module
Wind Tunnel
PWBs
5.97_
(0.235)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)