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DNT12S0A0S05NFA 参数 Datasheet PDF下载

DNT12S0A0S05NFA图片预览
型号: DNT12S0A0S05NFA
PDF下载: 下载PDF文件 查看货源
内容描述: 德尔福系列DNT12非隔离负载DC / DC电源模块的点: 8.3 〜 14Vin , 0.75 〜 5.5Vo , 3A [Delphi series DNT12 Non-Isolated Point of Load DC/DC Power Modules: 8.3~14Vin, 0.75~5.5Vo, 3A]
分类和应用: 电源电路
文件页数/大小: 12 页 / 730 K
品牌: DELTA [ DELTA ELECTRONICS, INC. ]
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THERMAL CONSIDERATIONS  
THERMAL CURVES  
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.  
Figure 28: Temperature measurement location  
The allowed maximum hot spot temperature is defined at 125.  
DNT12S0A0S03(standard) Output Current vs. Ambient Temperature and Air Velocity  
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. The height of this fan duct is constantly  
kept at 25.4mm (1’’).  
@Vin = 12V,Vo=0.75V~5V (Either Orientation)  
Output Current (A)  
3.5  
3.0  
2.5  
2.0  
1.5  
1.0  
0.5  
0.0  
Natural  
Convection  
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.  
25  
30  
35  
40  
45  
50  
55  
60  
65  
70  
75  
80  
85  
Ambient Temperature ()  
Figure 29:Output current vs. ambient temperature and air  
PWB  
FACING PWB  
velocity@ Vin=12V, Vo=0.75V ~5.0V (Either Orientation)  
MODULE  
AIR VELOCITY  
AND AMBIENT  
TEMPERATURE  
MEASURED BELOW  
THE MODULE  
50.8 (2.0”)  
AIR FLOW  
12.7 (0.5”)  
25.4 (1.0”)  
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches  
Figure 27: Wind tunnel test setup  
DS_DNT12SMD03_06252007  
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