DNL04S0A0S16PFD Delta Electronics, Inc., DNL04S0A0S16PFD Datasheet - Page 13

• Manufacturer Part Number: DNL04S0A0S16PFD
• Description: Delphi Dnl, Non-isolated Point Of Load Dc/dc Power Modules 2.8-5.5vin, 0.75-3.3v/16a Out
• 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 height of this fan duct is constantly
kept at 25.4mm (1’’).
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.
Figure 44: Wind tunnel test setup
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
DS_DNL04SMD16A_03052009
MEASURED BELOW
entire
following
TEMPERATURE
AIR VELOCITY
AND AMBIENT
THE MODULE
temperature
FACING PWB
encountered
figure
AIR FLOW
shows
range
in
PWB
50.8 (2.0”)
MODULE
the
12.7 (0.5”)
25.4 (1.0”)
most
of
the
wind
electronics
module.
tunnel
THERMAL CURVES
Figure 45: Hot spot temperature measured point
Figure 46: DNL04S0A0S16 output current vs. ambient
temperature and air velocity@Vin=5V, Vo=3.3V(Either
Orientation)
Figure 47: DNL04S0A0S16 output current vs. ambient
temperature and air velocity@Vin=5V, Vo=1.5V(Either
Orientation)
20
15
10
20
15
10
*The allowed maximum hot spot temperature is defined at 125
*The over-temperature shutdown is 130
5
0
5
0
60
60
Output Current(A)
Output Current(A)
Convection
Natural
DNL04S0A0S16(Standard) Output Current vs. Ambient Temperature and Air Velocity
DNL04S0A0S16(Standard) Output Current vs. Ambient Temperature and Air Velocity
300LFM
100LFM
200LFM
65
65
@ Vin = 5.0V, Vo = 1.5V (Either Orientation)
Convection
@ Vin = 5V, Vo = 3.3V (Either Orientation)
Natural
100LFM
200LFM
70
70
℃
75
75
.
80
80
Ambient Temperature (℃)
Ambient Temperature (℃)
℃
85
85
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