S48SP3R310NRFB Delta Electronics, S48SP3R310NRFB Datasheet - Page 10

• Manufacturer Part Number: S48SP3R310NRFB
• Description: MODULE DC/DC 1X1 BRICK 3.3V 10A
• Manufacturer: Delta Electronics
• Series: Delphi S48SPr
• Type: Isolated with Remote On/Off and UVLOr

Specifications of S48SP3R310NRFB

• Operating Temperature: -40°C ~ 110°C
• Power (watts) - Rated: 33W
• Efficiency: 90%
• Approvals: CE, cUL, TUV, UL
• Output: 3.3V
• Number Of Outputs: 1
• Power (watts): 35W
• Mounting Type: Through Hole
• Voltage - Input: 36 ~ 75V
• Package / Case: 6-DIP Module, 1x1 Brick
• 1st Output: 3.3 VDC @ 10A
• Size / Dimension: 1.30" L x 0.96" W x 0.34" H (33mm x 24.4mm x 8.55mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• 2nd Output: -
• 3rd Output: -
• 4th Output: -
• Other names: 941-1043

DS_S48SP3R310_05222008
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 space between the neighboring PWB
and the top of the power module is constantly kept at
6.35mm (0.25’’).
Figure 19: Wind tunnel test setup
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
MEASURED BELOW
following
TEMPERATURE
AIR VELOCITY
AND AMBIENT
THE MODULE
FACING PWB
encountered
figure
AIR FLOW
shows
in
PWB
50.8 (2.0”)
MODULE
12.7 (0.5”)
the
most
wind
electronics
tunnel
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 20: Hot spot temperature measured point
＊
Figure 21: Output load vs. ambient temperature and air
velocity@Vin=48V (Either Orientation)
11
10
9
8
7
6
5
4
3
2
1
0
60
The allowed maximum hot spot temperature is defined at 110
Output Current(A)
S48SP3R310(Standard) Output Load vs. Ambient Temperature and Air Velocity
Convection
Natural
65
100LFM
200LFM
@Vin=48V (Either Orientation)
300LFM
70
400LFM
500LFM
600LFM
75
80
Ambient Temperature (℃)
85
℃
10