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參數(shù)資料
| 型號(hào)： | HLMP-6xxx |
| 英文描述： | Subminiature Lamps(超小型照明燈) |
| 中文描述： | 微型燈泡（超小型照明燈） |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 23K |
| 代理商： | HLMP-6XXX |
2
Example of Failure Rate Calculation:
Assume a device operating 8 hours/day, 5 days a week. The utilization factor, given 168 hours/week is:
(8 hours/day) x (5 days/week)
÷
(168 hours/week)
=
0.25
The point failure rate per year (8760 hours) at 55
°
C ambient temperature is:
(0.010%/1K hours) x 0.25 x (8760 hours/year) = 0.022% per year
Similarly, 90% confidence level failure rate per year at 55
°
C:
(0.022%/1K hours) x 0.25 x (8760 hours/year) = 0.048% per year
Table 2.
Point Typical
Performance
[1]
in Time
Failure Rate
MTBF
[1]
(%/1K Hours)
3,340,000
4,782,000
6,983,000
10,423,000
15,930,000
24,986,000
40,313,000
Performance in Time
[2]
(90%Confidence)
Failure Rate
MTBF
[2]
(%/1K Hours)
1,451,000
2,077,000
3,033,000
4,527,000
6,919,000
10,852,000
17,509,000
Ambient Temp.
(
°
C)
85
75
65
55
45
35
25
J unction Temp.
(
°
C)
105
95
85
75
65
55
45
I
F
30
0.030 %
0.021 %
0.014 %
0.010 %
0.006 %
0.004 %
0.002 %
0.069 %
0.048 %
0.033 %
0.022 %
0.014 %
0.009 %
0.006 %
Notes:
1. The point typical MTBF (which represents 60% confidence level) is the total device hours divided by the number of
failures. In the case of zero failures, one failure is assumed for this calculation.
2. The 90% confidence MTBF represents the minimum level of reliability performance which is expected from 90% of all
samples. This confidence interval is based on the statistics of the distribution of failures. The assumed distribution of
failures is exponential. This particular distribution is commonly used in describing useful life failures. Refer to
MIL-STD-690B for details on this methodology.
3. A failure is any LED which does not emit light.
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|---|---|
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