Data Sheet
16V Pico TLynxTM 4A: Non-isolated DC-DC Power Modules
8 – 16Vdc input; 0.6Vdc to 8.0Vdc output; 4A output current
September 13, 2010
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 60. The preferred airflow
direction for the module is in Figure 61.
25.4_
Wind Tunnel
PWBs
(1.0)
Figure 61. Preferred airflow direction and location
of hot-spot of the module (Tref).
Power Module
76.2_
(3.0)
x
Probe Location
for measuring
airflow and
12.7_
(0.50)
ambient
temperature
Air
flow
Figure 60. Thermal Test Setup.
The thermal reference points, Tref used in the
specifications are also shown in Figure 60. For
reliable operation the temperatures at these points
should not exceed 120oC. 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
19
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
