DNL04S0A0R06NFD DELTA [Delta Electronics, Inc.], DNL04S0A0R06NFD Datasheet - Page 13

• Manufacturer Part Number: DNL04S0A0R06NFD
• Description: Delphi DNS, Non-Isolated Point of Load DC/DC Power Modules: 2.8-5.5Vin, 0.75-3.3V/6Aout
• Manufacturer: DELTA [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 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
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 43: Wind tunnel test setup
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
DS_DNS04SMD6A_10202006
MEASURED BELOW
following
TEMPERATURE
AIR VELOCITY
AND AMBIENT
THE MODULE
FACING PWB
encountered
figure
AIR FLOW
shows
in
PWB
50.8 (2.0”)
MODULE
the
12.7 (0.5”)
25.4 (1.0”)
most
wind
electronics
tunnel
THERMAL CURVES
Figure 44: Temperature measurement location
The allowed maximum hot spot temperature is defined at 127
Figure 45: Output current vs. ambient temperature and air
velocity@Vin=5V, Vout=3.3V(Either Orientation)
Figure 46: Output current vs. ambient temperature and air
velocity@Vin=5V, Vout=1.5V(Either Orientation)
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
25
25
Output Current(A)
Output Current(A)
DNS04S0A0S06(Standard) Output Current vs. Ambient Temperature and Air Velocity
DNS04S0A0S06(Standard) Output Current vs. Ambient Temperature and Air Velocity
35
35
@ Vin=5V, Vout = 3.3V(Either Orientation)
@ Vin=5V, Vout = 1.5V(Either Orientation)
45
45
Convection
Convection
Natural
Natural
55
55
65
65
Ambient Temperature (℃)
Ambient Temperature (℃)
75
75
13
℃
85
85