參數(shù)資料
型號： 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)： 37/38頁
文件大?。?/td> 223K
代理商： PS2608L
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
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PS2621 Optocoupler Applications
PS2621L Optocoupler Applications
PS2622 Optocoupler Applications
PS2622L Optocoupler Applications
PS2653 Optocoupler Applications
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PS260MA24A 功能描述:EMI/RFI 抑制器及鐵氧體 PCB Shield Enclosure Adhesive Base RoHS:否 制造商:Fair-Rite 產(chǎn)品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流電流: 最大直流電阻: 工作溫度范圍:- 55 C to + 125 C 封裝 / 箱體: 端接類型:SMD/SMT
PS260MA44 功能描述:EMI/RFI 抑制器及鐵氧體 PCB Shield Enclosure RoHS:否 制造商:Fair-Rite 產(chǎn)品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流電流: 最大直流電阻: 工作溫度范圍:- 55 C to + 125 C 封裝 / 箱體: 端接類型:SMD/SMT
PS260MA44A 功能描述:EMI/RFI 抑制器及鐵氧體 PCB Shield Enclosure Adhesive Base RoHS:否 制造商:Fair-Rite 產(chǎn)品:Ferrite Cores 阻抗:365 Ohms 容差: 最大直流電流: 最大直流電阻: 工作溫度范圍:- 55 C to + 125 C 封裝 / 箱體: 端接類型:SMD/SMT
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