Data Sheet
Pico TLynxTM 6A: Non-isolated DC-DC Power Modules
May 20, 2009
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 6A output current
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 45. The preferred airflow direction
for the module is in Figure 46.
Figure 46. Preferred airflow direction and location of
hot-spot of the module (Tref).
25.4_
(1.0)
Wind Tunnel
PWBs
Power Module
76.2_
(3.0)
x
Probe Location
for measuring
airflow and
12.7_
(0.50)
ambient
temperature
Air
flow
Figure 45. Thermal Test Setup.
The thermal reference points, Tref used in the
specifications are also shown in Figure 43. 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).
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
17
LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
