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E36SR05015NRFA Datasheet(PDF) 10 Page - Delta Electronics, Inc.

Part # E36SR05015NRFA
Description  Delphi Series E36SR, Eighth Brick Family
Download  16 Pages
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Manufacturer  DELTA [Delta Electronics, Inc.]
Direct Link  http://www.deltaww.com
Logo DELTA - Delta Electronics, Inc.

E36SR05015NRFA Datasheet(HTML) 10 Page - Delta Electronics, Inc.

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DS_E36SR3R320_10292013
10
THERMAL CONSIDERATIONS
Thermal management is an important part of the system
design. To ensure proper, reliable operation, sufficient
cooling of the power module is needed over the entire
temperature range of the module. Convection cooling is
usually the dominant mode of heat transfer.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments
encountered
in
most
electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in which
the power modules are mounted.
The
following
figure
shows
the
wind
tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the neighboring PWB
and the top of the power module is constantly kept at
6.35mm (0.25’’).
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
12.7 (0.5”)
MODULE
AIR FLOW
50.8 (2.0”)
FACING PWB
PWB
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
Figure 20: Wind tunnel test setup
Thermal Derating
Heat can be removed by increasing airflow over the module.
The hottest point temperature of the module is to be defined.
To enhance system reliability; the power module should
always
be
operated
below
the
maximum
operating
temperature. If the temperature exceeds the maximum
module temperature, reliability of the unit may be affected.
THERMAL CURVES
Figure 21: Hot spot temperature measured point.
E36SR3R320(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 24V (Transverse Orientation)
0
4
8
12
16
20
25
30
35
40
45
50
55
60
65
70
75
80
85
Natural
Convection
100LFM
300LFM
400LFM
Ambient Temperature (℃)
Output Current (A)
500LFM
600LFM
200LFM
Figure 22: Output load vs. ambient temperature and air velocity @
Vin=24V(Transverse Orientation)
E36SR3R320(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
0
4
8
12
16
20
25
30
35
40
45
50
55
60
65
70
75
80
85
Natural
Convection
100LFM
300LFM
200LFM
400LFM
Ambient Temperature (℃)
Output Current (A)
500LFM
Figure 23: Output load vs. ambient temperature and air velocity @
Vin=48V(Transverse Orientation)


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