參數(shù)資料
型號(hào): PS2608L
廠商: NEC Corp.
英文描述: Optocoupler Applications
中文描述: 光耦應(yīng)用
文件頁數(shù): 33/38頁
文件大?。?/td> 223K
代理商: PS2608L
32
CTR vs. IF Characteristics
As shown in Figure 8, the CTR of a single-transistor output optocoupler (such as the PS2501 and PS2505 optocouplers) is at
most 20% in a low-current area (e.g. I
F
= 0.1 mA). However, the CTR of a Darlington-transistor output optocoupler (such as the
PS2502 and PS2506 optocouplers) can be greater than 200% in a low-current area (e.g. I
F
= 0.1 mA).
Figure 24 shows the CTR vs. I
F
characteristics of the PS2502 and PS2506 optocouplers.
Forward Current IF (mA)
C
CONCLUSION
Demand for optocouplers featuring higher insulation and noise elimination is steadily increasing. At the same time, various
problems (change of characteristics by ambient temperature and time elapse) will occur in their circuit design. We hope this
manual will be helpful in solving such problems.
Figure 24. CTR vs. I
F
Characteristics (Standard Value)
(PS2502, PS2506)
7000
6000
5000
4000
3000
2000
1000
0
0.05 0.1
0.5
1
5
10
50
Standard characteristics
V
CE
= 2V
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