DSAU201 Delta Electronics, Inc., DSAU201 Datasheet - Page 5

• Manufacturer Part Number: DSAU201
• Description: Delphi Dsau200 Series Dc/dc Power Modules 5, 12, 24vin, 1w Smd
• Manufacturer: Delta Electronics, Inc.

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
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
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in
which the power modules are mounted.
The
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The space between the facing PWB and
PWB is constantly kept at 25.4mm (1’’).
Figure 4: Wind tunnel test setup
Thermal Derating
Heat can be removed by increasing airflow over the
module. 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.
entire temperature range
following
encountered
figure
shows
in
the
most
of
the
wind
electronics
module.
tunnel
Figure 5: Derating Curve
120%
100%
THERMAL CURVES
80%
60%
40%
20%
0%
25
Output Power (%)
DSAU200series Output Current vs. Ambient Temperature and Air Velocity
35
45
(Either Orientation)
Convection
Natural
55
65
Ambient Temperature (℃)
75
85
5