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JAW075A 参数 Datasheet PDF下载

JAW075A图片预览
型号: JAW075A
PDF下载: 下载PDF文件 查看货源
内容描述: JAW050A和JAW075A电源模块; DC-DC转换器36伏至75伏直流输入, 5伏直流输出; 50瓦到75瓦 [JAW050A and JAW075A Power Modules; dc-dc Converters 36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W]
分类和应用: 转换器电源电路DC-DC转换器
文件页数/大小: 16 页 / 435 K
品牌: LINEAGEPOWER [ LINEAGE POWER CORPORATION ]
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JAW050A and JAW075A Power Modules; dc-dc Converters:  
36 Vdc to 75 Vdc Input, 5 Vdc Output; 50 W to 75 W  
Data Sheet  
April 2008  
Thermal Considerations (continued)  
Introduction (continued)  
12  
11  
VI = 75 V  
VI = 55 V  
VI = 36 V  
10  
9
The temperature at this location should not exceed  
100 °C. The output power of the module should not  
exceed the rated power for the module as listed in the  
Ordering Information table.  
8
7
6
Although the maximum case temperature of the power  
modules is 100 °C, you can limit this temperature to a  
lower value for extremely high reliability.  
5
4
3
0
1
2
3
4
5
6
7
8
9
10  
OUTPUT CURRENT, IO (A)  
Heat Transfer Without Heat Sinks  
8-3336(F)  
Figure 19. JAW050A Power Dissipation vs.  
Output Current at 25 °C  
Increasing airflow over the module enhances the heat  
transfer via convection. Figures 21 and 22 show the  
maximum power that can be dissipated by the module  
without exceeding the maximum case temperature ver-  
sus local ambient temperature (TA) for natural convec-  
tion through 4 m/s (800 ft./min.). Note that the thermal  
performance is orientation dependent. Longitudinal ori-  
entation occurs when the long direction of the module  
is parallel to the airflow, whereas transverse orientation  
occurs when the short direction of the module is paral-  
lel to the airflow.  
16  
15  
VI = 75 V  
14  
13  
12  
11  
10  
9
VI = 55 V  
VI = 36 V  
Note that the natural convection condition was mea-  
sured at 0.05 m/s to 0.1 m/s (10 ft./min. to 20 ft./min.);  
however, systems in which these power modules may  
be used typically generate natural convection airflow  
rates of 0.3 m/s (60 ft./min.) due to other heat-dissipat-  
ing components in the system. The use of Figure 22 is  
shown in the following example.  
8
7
6
5
4
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15  
OUTPUT CURRENT, IO (A)  
8-3337(F)  
Example  
Figure 20. JAW075A Power Dissipation vs.  
Output Current at 25 °C  
What is the minimum airflow necessary for a JAW075A  
operating at VI = 55 V, an output current of 15 A, trans-  
verse orientation, and a maximum ambient tempera-  
ture of 55 °C?  
Solution  
Given: VI = 55 V  
IO = 15 A  
TA = 55 °C  
Determine PD (Use Figure 20.):  
PD = 14 W  
Determine airflow (v) (Use Figure 22.):  
v = 2.3 m/s (460 ft./min.)  
Lineage Power  
11