Data Sheet
Austin MegaLynxTM SMT: Non-Isolated DC-DC Power Modules:
4.5 – 5.5Vdc input; 0.8 to 3.63Vdc Output; 30A output current
6.0 – 14Vdc Input; 0.8Vdc to 3.63Vdc Output; 20/30A output
June 3, 2009
The thermal reference points, Tref used in the
specifications are shown in Figure 56. For reliable
operation the temperatures at these points should
not exceed 125oC. The output power of the module
should not exceed the rated power of the module
(Vo,set x Io,max).
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 54. Note
that the airflow is parallel to the short axis of the
module as shown in Figure 55. The derating data
applies to airflow in either direction of the module’s
long axis.
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.
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
Figure 55. Airflow direction for thermal testing.
76.2_
(3.0)
x
Probe Location
for measuring
airflow and
12.7_
(0.50)
ambient
temperature
Figure 56. T
location.
Temperature measurement
ref
Air
flow
Figure 54. Thermal Test Setup.
LINEAGE POWER
19
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
