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參數(shù)資料
| 型號： | PS2622L |
| 廠商： | NEC Corp. |
| 英文描述： | Optocoupler Applications |
| 中文描述： | 光耦應(yīng)用 |
| 文件頁數(shù)： | 20/38頁 |
| 文件大?。?/td> | 223K |
| 代理商： | PS2622L |
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19
A design example of an optocoupler circuit that operates for at least ten years is shown below (using Fig. 3-3, 4-2 and 4-3). The
major causes of CTR reduction area as follows:
(From Fig. 3-3)
CTR-relative-value vs. R
BE
characteristics
15% down (with respect to initial value, R
BE
=
×
)
(From Fig. 4-2)
CTR change with time (10 years, Ta = 60
°
C)
40% down (with respect to initial value, 0 year)
(From Fig. 4-3)
CTR-relative-value vs. ambient-temperature characteristics
(Ta = 60
°
C)
15% down (with respect to initial value t
a
= 25
°
C)
Considering the above characteristics and safety factor = 2 (twice margin), the recommended CTR is:
21.6 x 1.4 x 1.15 x 1.15 x 2 = 80%.................(15)
(Reference)
Accordingly, the CTR value including reduction of CTR by time elapse, temperature change, and insertion of R
BE
must be 21.6 %
or more.
I
F
= 5 mA
T
A
= 25
C
I
F
= 20 mA
T
A
= 25
C
I
F
= 5 mA
T
A
= 60
C
Normalized to CTR
test conditon
I
F
= 5 mA, V
CE
= 5V
10
1.2
1.0
0.8
0.6
0.4
0.2
0
0
10
10
10
2
3
4
5
Time (Hr)
Figure 4-2. Change of CTR with
Time (PS2601)
C
Ambient Temperature T
A
(
°
C)
Figure 4-3. CTR-Relative-Value vs.
T
A
Characteristics
C
Normalized to 100
at T
A
= 25
C
I
F
= 5 mA, V
CE
= 5 V
1.2
1.0
0.8
0.6
0.4
0.2
0
-55 -40
-20
20
40
60
80
100
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PS2653 | Optocoupler Applications |
| PS2653L2 | Optocoupler Applications |
| PS2654L2 | Optocoupler Applications |
| PS2625 | HIGH ISOLATION VOLTAGE AC INPUT LARGE FORWARD AC INPUT TYPE 6 PIN PHOTOCOUPLER |
| PS2625L | HIGH ISOLATION VOLTAGE AC INPUT LARGE FORWARD AC INPUT TYPE 6 PIN PHOTOCOUPLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PS2625 | 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications |
| PS2625L | 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications |
| PS2626 | 制造商:California Eastern Laboratories (CEL) 功能描述:6pin DIP,Single Tr, AC, High Input, Coupler 制造商:Renesas Electronics 功能描述:Optocoupl AC-IN 1-CH Trans DC-OUT 6-Pin PDIP Cut Tape |
| PS2626L | 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications |
| PS2626N | 制造商:NEC Electronics Corporation 功能描述: |
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