Data Sheet
Austin MiniLynxTM 12V SIP Non-isolated Power Modules:
March 31, 2008
8.3 – 14Vdc Input; 0.75Vdc to 5.5Vdc Output; 3A output current
Thermal Considerations
Power modules operate in a variety of thermal
environments; however, sufficient cooling should be
provided to help ensure reliable operation.
25.4_
(1.0)
Wind Tunnel
PWBs
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 32. Note that the airflow is
parallel to the long axis of the module as shown in
figure 31. The derating data applies to airflow in
either direction of the module’s long axis.
Powe r Mod ule
76.2_
(3.0)
x
Airflow
Probe Location
for measuring
airflow and
ambient
5.97_
(0.235)
temperature
Air
flow
Figure 32. Thermal Test Set-up.
Tref1
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 by various module versus local ambient
temperature (TA) for natural convection and up to
0.5m/s (100 ft./min) are shown in the Characteristics
Curves section.
Tref2
Figure 31. T
location.
Temperature measurement
ref
The thermal reference point, Tref used in the
specifications is shown in Figure 32. For reliable
operation this temperature should not exceed 115oC.
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.
LINEAGE POWER
14
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
