APXH003A0X-SRZ_0910 Datasheet, PDF (17/23 Pages) Lineage Power Corporation – Pico TLynxTM 3A: Non-Isolated DC-DC Power Modules

Data Sheet
October 8, 2009
Pico TLynx^TM 3A: Non-isolated DC-DC Power Modules
2.4 – 5.5Vdc input; 0.6Vdc to 3.63Vdc output; 3A 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 shown in Figure 46.
Wind Tunnel
PWBs
25.4_
(1.0)
Power Module
Figure 46. Preferred airflow direction and location
of hot-spot of the module (Tref).
76.2_
(3.0)
x
12.7_
(0.50)
Air
flow
Probe Location
for measuring
airflow and
ambient
temperature
Figure 45. Thermal Test Setup.
The thermal reference points, T_ref used in the
specifications are shown in Figure 46. For reliable
operation the temperatures at these points should not
exceed 125^oC. 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
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