- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383778 > PS2622L (NEC Corp.) Optocoupler Applications PDF資料下載
參數(shù)資料
| 型號： | PS2622L |
| 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： | PS2622L |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁當(dāng)前第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁
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 |
|---|---|
| PS2653 | Optocoupler Applications |
| PS2653L2 | Optocoupler Applications |
| PS2654L2 | Optocoupler Applications |
| PS2625 | HIGH ISOLATION VOLTAGE AC INPUT LARGE FORWARD AC INPUT TYPE 6 PIN PHOTOCOUPLER |
| PS2625L | HIGH ISOLATION VOLTAGE AC INPUT LARGE FORWARD AC INPUT TYPE 6 PIN PHOTOCOUPLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PS2625 | 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications |
| PS2625L | 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications |
| PS2626 | 制造商:California Eastern Laboratories (CEL) 功能描述:6pin DIP,Single Tr, AC, High Input, Coupler 制造商:Renesas Electronics 功能描述:Optocoupl AC-IN 1-CH Trans DC-OUT 6-Pin PDIP Cut Tape |
| PS2626L | 制造商:NEC 制造商全稱:NEC 功能描述:Optocoupler Applications |
| PS2626N | 制造商:NEC Electronics Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。