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參數(shù)資料
| 型號： | HLMP-QB00 |
| 英文描述： | Subminiature InGaN Blue Lamps(超小型銦氮化鎵藍色燈) |
| 中文描述： | 微型InGaN藍色燈（超小型銦氮化鎵藍色燈） |
| 文件頁數(shù)： | 2/4頁 |
| 文件大?。?/td> | 24K |
| 代理商： | HLMP-QB00 |
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 85
°
C ambient temperature is:
(0.595%/1K hours) x 0.25 x (8760 hours/year) = 1.303% per year
Similarly, 90% confidence level failure rate per year at 85
°
C:
(1.371%/1K hours) x 0.25 x (8760 hours/year) = 3.002% per year
Table 2.
Point Typical
Performance
[1]
in Time
Failure Rate
MTBF
[1]
(%/1K Hours)
168,000
235,000
334,000
485,000
719,000
1,091,000
1,698,000
Performance in Time
[2]
(90%Confidence)
Ambient Temp.
(
°
C)
85
75
65
55
45
35
25
J unction Temp.
(
°
C)
118
108
98
88
78
68
58
Failure Rate
(%/1K Hours)
1.371
0.980
0.689
0.475
0.320
0.211
0.136
I
F
30
MTBF
[2]
73,000
102,000
145,000
211,000
312,000
474,000
737,000
0.595
0.426
0.299
0.206
0.139
0.092
0.059
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 or maximum % Iv degradation is more than 50%.
4. Calculated from data generated at 85
°
C biased at 30 mA.
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