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參數(shù)資料
| 型號： | V48SR1R825NRFA |
| 廠商： | Delta Electronics, Inc. |
| 英文描述： | Delphi Series V48SR, 1/16th Brick 66W DC/DC Power Modules: 48V in, 1.2V, 25A out |
| 中文描述： | 德爾福系列V48SR，0.16磚66W DC / DC電源模塊：在48V電壓，為1.2V，25A條出 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 666K |
| 代理商： | V48SR1R825NRFA |
DS_V48SR1R225_01312007
10
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
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
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’’).
in
most
electronics
the
wind
tunnel
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 20:
Wind tunnel test setup
12.7 (0.5”)
MODULE
AIR FLOW
50.8 (2.0”)
FACING PWB
PWB
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
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 21:
Temperature measurement location
The allowed maximum hot spot temperature is defined at 127
℃
.
V48SR1R225(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Either Orientation)
Output Current (A)
0
5
10
15
20
25
65
70
75
80
85
Natural
Convection
100LFM
300LFM
200LFM
Ambient Temperature (
℃
)
Figure 22:
Output Current vs. Ambient Temperature and Air
Velocity @ Vin=48V (Either Orientation)
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