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Document Number: 81181
156 Rev. 1.2, 07-Jan-10
4N35, 4N36, 4N37
Vishay Semiconductors
Optocoupler, Phototransistor Output,
with Base Connection
Fig. 5 - Normalized Non-Saturated and Saturated CTR vs.
LED Current
Fig. 6 - Collector Emitter Current vs.
Temperature and LED Current
Fig. 7 - Collector Emitter Leakage Current vs. Temperature
Fig. 8 - Normalized CTR
cb
vs. LED Current and Temperature
Fig. 9 - Normalized Photocurrent vs. I
F
and Temperature
Fig. 10 - Normalized Non-Saturated h
FE
vs.
Base Current and Temperature
i4n25_05
1001010.1
0.0
0.5
1.0
1.5
I
F
- LED Current (mA)
NCTR - Normalized CTR
NCTR
NCTR(SAT)
T
A
= 85 °C
Normalized to:
CTR
CE(sat)
V
CE
= 0.4 V
V
CE
= 10 V, I
F
= 10 mA, T
A
= 25 °C
i4n25_06
6050403020100
0
5
10
15
20
25
30
35
50 °C
70 °C
85 °C
I
F
- LED Current (mA)
I
CE
- Collector Current (mA)
25 °C
i4n25_07
100806040200- 20
10
- 2
10
- 1
10
0
10
1
10
2
10
3
10
4
10
5
T
amb
- Ambient Temperature (°C)
I
CEO
- Collector Emitter (nA)
Typical
V
CE
= 10 V
i4n25_08
0.0
0.5
1.0
1.5
25 °C
50 °C
70 °C
I
F
- LED Current (mA)
NCTR
cb
- Normalized CTR
cb
0.1 1 10 100
Normalized to:
V
CB
= 9.3 V, I
F
= 10 mA, T
A
= 25 °C
i4n25_09
0.
0.01
1
1
10
I
F
- LED Current (mA)
Normalized Photocurrent
0.1 1 10 100
I
F
= 10 mA, T
A
= 25 °C
Nib, T
A
= - 20 °C
Normalized to:
Nib, T
A
= 20 °C
Nib, T
A
= 50 °C
Nib, T
A
= 70 °C
i4n25_10
0.4
0.6
1.0
1.2
I
b
- Base Current (µA)
1 10 100 1000
I
B
= 20 µA, V
CE
= 10 V,
T
A
= 25 °C
25 °C
70 °C
- 20 °C
Nh
FE
- Normalized h
FE
0.8
Normalized to:
