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ADDC02808PBTV/QMLH

更新时间： 2024-02-01 23:01:15
品牌 Logo 应用领域
亚德诺 - ADI 转换器模拟IC信号电路脉冲局域网
页数 文件大小 规格书
20页 290K
描述
28 V, 200 W Pulsed DC/DC Converter with Integral EMI Filter

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ADDC02808PBTV/QMLH 技术参数

生命周期：Obsolete包装说明：, FLANGE MT,2.8X1.8
Reach Compliance Code：compliant风险等级：5.84
最大输入电压：40 V最小输入电压：18 V
最大输出电流：25 A标称输出电压：8 V
封装主体材料：METAL封装等效代码：FLANGE MT,2.8X1.8
认证状态：Not Qualified筛选级别：38535Q/M;38534H;883B
子类别：Other Analog ICs技术：HYBRID
Base Number Matches：1

ADDC02808PBTV/QMLH 数据手册

 浏览型号ADDC02808PBTV/QMLH的Datasheet PDF文件第14页浏览型号ADDC02808PBTV/QMLH的Datasheet PDF文件第15页浏览型号ADDC02808PBTV/QMLH的Datasheet PDF文件第16页浏览型号ADDC02808PBTV/QMLH的Datasheet PDF文件第17页浏览型号ADDC02808PBTV/QMLH的Datasheet PDF文件第18页浏览型号ADDC02808PBTV/QMLH的Datasheet PDF文件第20页 
ADDC02808PB  
where R(t) is the probability of a device not failing prior to some  
time t.  
circuit board through holes. In order to maintain the hermetic  
integrity of the seals around the pins, a fixture should be used  
for bending the pins without stressing the pin-to-sidewall seals.  
It is recommended that the minimum distance between the  
package edge and the inside of the pin be 100 mils (2.54 mm)  
for the 40 mil (1.02 mm) diameter pins; 120 mils (3.05 mm)  
from the package edge to the center of the pin as shown in  
Figure 43.  
If we substitute λ = 1/MTBF in the above formula, then the  
expression becomes  
–t  
R(t) = eMTBF  
This formula is the correct way to interpret the meaning of  
MTBF.  
If we assume t = MTBF = 1,000,000 hours, then the probability  
that a power supply will not fail prior to 1,000,000 hours of use  
is e–1, or 36.8%. This is quite different from saying the power  
supply will last 1,000,000 hours before it fails. The probability  
that the power supply will not fail prior to 50,000 hours of use is  
e
–.05, or 95%. For t = 10,000 hours, the probability of no failure  
0.100"  
is e–.01, or 99%.  
(2.54mm)  
0.120"  
Temperature and Environmental Factors: Although the  
calculation of MTBF per MIL-HDBK-217 is a detailed process,  
there are two key variables that give the manufacturer signi-  
ficant leeway in predicting an MTBF rating. These two vari-  
ables are temperature and environmental factor. Therefore, for  
users to properly compare MTBF numbers from two different  
manufacturers, the environmental factor and the temperature  
must be identical. Contact the factory for MTBF calculations  
for specific environmental factors and temperatures.  
(3.05mm)  
Figure 43. Minimum Bend Radius of 40 Mil (1.02 mm)  
Pins  
PS1  
1
2
17  
16  
15  
14  
13  
12  
MECHANICAL CONSIDERATIONS  
ADDC02808PB  
RLOAD  
When mounting the converter into the next higher level assem-  
bly, it is important to insure good thermal contact is made be-  
tween the converter and the external heat sink. Poor thermal  
connection can result in the converter shutting off, due to the  
temperature shutdown feature (Pin 9), or reduced reliability for  
the converter due to higher than anticipated junction and case  
temperatures. For these reasons the mounting tab locations  
were selected to insure good thermal contact is made near the  
hot spots of the converter which are shown in the shaded areas  
of Figure 42.  
10  
11  
+28VDC  
28RTN  
C1  
NOTE: VALUE OF C1 IS DEPENDENT ON SOURCE IMPEDANCE.  
REFER TO SECTION ON SYSTEM INSTABILITY CONSIDERATIONS.  
Figure 44. Typical Power Connections and External Parts  
for Converter  
PS1  
1
2
17  
16  
15  
14  
13  
12  
ADDC02808PB  
8
V
+
OUT  
10  
11  
+28VDC  
+SENSE PS1  
+SENSE PS2  
RLOAD  
–SENSE PS1  
–SENSE PS2  
C1  
PS2  
28RTN  
1
2
17  
16  
15  
14  
13  
12  
V
–
OUT  
ADDC02808PB  
I SHARE  
8
10  
11  
NOTE: VALUE OF C1 IS DEPENDENT ON SOURCE IMPEDANCE.  
REFER TO SECTION ON SYSTEM INSTABILITY CONSIDERATIONS.  
Figure 45. Typical Connections for Paralleling Two  
Converters  
Figure 42. Hot Spots (Shaded Areas) of DC/DC Converter  
The pins of the converter are typically connected to the next  
higher level assembly by bending them at right angles, either  
down or up, and cutting them shorter for insertion in printed  
REV. A  
–19–  
1...1617181920

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