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)： 17/38頁(yè)
文件大?。?/td> 223K
代理商： PS2603L
16
Expression (6) indicates that the current transfer ratio (CTR) is significantly affected by the value of I
CBL
R
BE
. For example, if
the forward current I
F
of the light-emitting diode is smaller (that is, I
CBL
is smaller) or if the base-emitter resistance R
BE
is smaller,
the reduction rate (rate of I
C
') becomes greater.
The above CTR reduction must be considered when inserting a resistor between the emitter and the base of the phototransistor
of the optocoupler to increase the switching speed. The performance of the optocoupler might become unstable because the
CTR will be affected by time elapse or temperature change (even if it is initially stable).
Fig. 3-3 shows the
CTR-R
BE
characteristics.
Normalized to 1.0
at R
BE
=
×
I
F
= 1 mA, V
CE
= 5V
CTR = 274%
CTR =166%
1.0
0.8
0.6
0.4
0.2
0
100
200
300 400 500
1000
8
Base Emitter Resistance R
BE
(k
)
C
C
Base Emitter Resistance R
BE
(k
)
Base Emitter Resistance R
BE
(k
)
C
Figure 3-3.
CTR-R
BE
Characteristics
CTR = 274%
CTR =166%
1.0
0.8
0.6
0.4
0.2
0
100
200
300 400 500
1000
8
Normalized to 1.0
at R
BE
=
×
I
F
= 10 mA, V
CE
= 5V
CTR = 274%
CTR =166%
Normalized to 1.0
at R
BE
=
×
I
F
= 5 mA, V
CE
= 5V
1.0
0.8
0.6
0.4
0.2
0
100
200
300 400 500
1000
8
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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