參數(shù)資料
型號(hào)： PS2603L
廠商： NEC Corp.
英文描述： Optocoupler Applications
中文描述： 光耦應(yīng)用
文件頁(yè)數(shù)： 37/38頁(yè)
文件大小： 223K
代理商： PS2603L
36
Example 3: Sequencer circuit input section
AC 100 V
PS2505-2
Common
Common
PS2501-2
AC 100V
(a) AC input compatible optocoupler
(bidirectional input)
(b) Conventional optocoupler
(one-direction input)
(Full-wave rectified by diode bridge)
PRECAUTIONS FOR DESIGN
The AC input compatible optocoupler is identical to the conventional optocoupler except for the presence of two LEDs connected
in reverse parallel in the input circuit. Therefore, the circuit configuration can be designed as conventionally. The difference is
that there are two types of current transfer ratios (CRT) because two LEDs are connected in the input circuit. The two CTRs are
not necessarily the same, owing to the differences in light emission and coupling efficiencies of LEDs. Consequently, this causes
deviation in output signal level. The differences are rated under the item of the current efficiency ratio (CTR
1
/CTR
2
) for electric
characteristics.
Current transfer ratio (CTR
1
/CTR
2
)
I
C1
CTR
1
=
I
F1
x (current flowing in LED1)
I
C2
CTR
2
=
I
F2
x (current flowing in LED2)
A
I
F1
A
A
I
F2
LED 2
LED 1
I
C1
I
C2
V
CE
= 5 V
Figure 5. CTR Measuring Circuit
相關(guān)PDF資料
PDF描述
PS2604 Optocoupler Applications
PS2604L Optocoupler Applications
PS2602 Optocoupler Applications
PS2602L Optocoupler Applications
PS2605 Optocoupler Applications
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PS2604 制造商:California Eastern Laboratories (CEL) 功能描述:6pin DIP,Darlington Tr, DC, Coupler
PS2604L 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications
PS2605 制造商:California Eastern Laboratories (CEL) 功能描述:6pin DIP,Single Tr, AC, Base, Coupler
PS2605L 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications
PS2606 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications
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