GE Industrial Solutions EQW006 Series - Manual (Page 11)

Data Sheet
July 27, 2011
EQW006 Series, Eight Brick Power Modules: DC-DC Converter
36 – 75Vdc Input; 12Vdc Output; 6A Output Current
LINEAGE POWER 11
Thermal Considerations
The power modules operate in a variety of thermal
environments; however, sufficient cooling should 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 as shown in the
Figure 13.
Figure 13. Thermal Test Set-up.
The thermal reference point, T
ref
used in the
specifications is shown in Figure 14. For reliable
operation this temperature should not exceed 120
o C.
Air Flow
Tref
Figure 14. T
ref
Temperature Measurement
Locations.
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.
Heat Transfer via Convection
Increased airflow over the module enhances the heat
transfer via convection. Derating figures showing the
maximum output current that can be delivered by
each module versus local ambient temperature (T
A
)
for natural convection and up to 2m/s (400 ft./min) are
shown in the respective Characteristics Curves
section.
Layout Considerations
Copper paths must not be routed beneath the power
module mounting inserts. Recommended SMT layout
shown in the mechanical section are for reference
only. SMT layout depends on the end PCB
configuration and the location of the load. For
additional layout guide-lines, refer to FLTR100V10
data sheet or contact your local Lineage Power field
application engineer.
Air
flow
x
Power Module
Wind Tunnel
PWBs
5.97_
(0.235)
76.2_
(3.0)
Probe Location
for measuring
airflow and
ambient
temperature
25.4_
(1.0)