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參數(shù)資料
| 型號： | PS2602L |
| 廠商： | NEC Corp. |
| 英文描述： | Optocoupler Applications |
| 中文描述： | 光耦應(yīng)用 |
| 文件頁數(shù)： | 17/38頁 |
| 文件大?。?/td> | 223K |
| 代理商： | PS2602L |
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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 |
|---|---|
| PS2605 | Optocoupler Applications |
| PS2605L | Optocoupler Applications |
| PS2606 | Optocoupler Applications |
| PS2606L | Optocoupler Applications |
| PS2607 | Optocoupler Applications |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PS2602LK-E3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NPN-OUTPUT DC-INPUT OPTOCOUPLER |
| PS2602LK-E4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NPN-OUTPUT DC-INPUT OPTOCOUPLER |
| PS2602LL-E3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NPN-OUTPUT DC-INPUT OPTOCOUPLER |
| PS2602LL-E4 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NPN-OUTPUT DC-INPUT OPTOCOUPLER |
| PS2602LM-E3 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:NPN-OUTPUT DC-INPUT OPTOCOUPLER |
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