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DCS Datasheet(PDF) 15 Page - Delta Electronics, Inc.

Part No. DCS
Description  Voltage and resistor-based trim
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Manufacturer  DELTA [Delta Electronics, Inc.]
Direct Link  http://www.deltaww.com
Logo DELTA - Delta Electronics, Inc.

DCS Datasheet(HTML) 15 Page - Delta Electronics, Inc.

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DS_DCS12S0A0S06NFA_11142013
15
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.
AIR FLOW
MODULE
PWB
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
FANCING PWB
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 40: 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.
THERMAL CURVES
Figure 41: Temperature measurement location
The allowed maximum hot spot temperature is defined at 120
0
1
2
3
4
5
6
55
60
65
70
75
80
85
90
95
100
105
Output Current(A)
Ambient Temperature (℃)
DCS12S0A0S06 Output Current vs. Ambient Temperature and Air Velocity
@Vin=12V Vout=5.0V (Either Orientation)
Natural
Convection
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
Figure 42: Output current vs. ambient temperature and air
velocity@Vin=12V, Vout=5.0V(Either Orientation)
0
1
2
3
4
5
6
55
60
65
70
75
80
85
90
95
100
105
Output Current(A)
Ambient Temperature (℃)
DCS12S0A0S06 Output Current vs. Ambient Temperature and Air Velocity
@Vin = 12V Vout=3.3V(Either Orientation)
100LFM
200LFM
300LFM
400LFM
500LFM
600LFM
Natural
Convection
Figure 43: Output current vs. ambient temperature and air
velocity@Vin=12V, Vout=3.3V(Either Orientation)


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