Data Sheet
Austin MegaLynxTM: Non-Isolated DC-DC Power Modules:
4.5 – 5.5Vdc input; 0.8 – 3.63Vdc output; 30A output current
6.0 – 14Vdc input; 0.8 – 5.5Vdc output; 25A output current
June 3, 2009
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 47. Note that the airflow is parallel to
the long axis of the module as shown in Figure 48. The
derating data applies to airflow in either direction of the
module’s long axis.
Back View
Figure 48. T
ref
Temperature measurement location.
The thermal reference point, Tref used in the
specifications is shown in Figure 48. For reliable
operation this temperature should not exceed 125oC.
25.4_
(1.0)
The output power of the module should not exceed the
rated power of the module (Vo,set x Io,max).
Wind Tunnel
PWBs
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.
Power Module
76.2_
(3.0)
x
Probe Location
for measuring
airflow and
12.7_
(0.50)
ambient
temperature
Air
flow
Figure 47. Thermal Test Set-up.
LINEAGE POWER
16
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
