Photocoupler
FEATURES
• Switching Time - Typ. 3㎲
• Collector-Emitter Voltage : Min.80V
• Current Transfer Ratio : Typ.100% (at IF=10mA, VCE=10V)
• Electrical Isolation Voltage : AC2500Vrms
• UL Recognized File No. E107486
APPLICATIONS
• Interface between two circuits of different potential
• Vending Machine, Voltage Regulator
• Traffic Controller System
• Programmable Controller
MAXIMUM RATINGS (Ta=25℃ )
*1. Input current with 100㎲ pulse width, 1% duty cycle
*2. Measured at RH=40~60% for 1min
*3. 1/16 inch form case for 10sec
mW
Input to Output Isolation Voltage*2
Parameter Symbol Rating Unit
Input
Forward Current IF
60
Total Power Dissipation
Peak Forward Current *1
IFP
3
Ptot 200
mA
V
A
Power Dissipation PD 70 mW
Reverse Voltage VR
5
Emitter-Collector Breakdown Voltage BVECO 6
Collector-Base Breakdown Voltage BVCBO 80
V
V
V
Collector Current IC100 mA
Collector-Emitter Breakdown Voltage BVCEO 80
Collector Power Dissipation PC 150 mW
Operating Temperature Topr -30~+100 ℃
AC2500
Storage Temperature Tstg -55~+125 ℃
Output
Lead Soldering Temperature*3
Tsol 260 ℃
K4N38 •K4N38A
These Photocouplers consist of a Gallium Arsenide Infrared Emitting
Diode and a Silicon NPN Phototransistor in a 6-pin package.
Viso Vrms
DIMENSION (Unit : mm)
1/3
6.4 0.25
8.9 0.25
2.54 0.25
1 2 3
1.2 0.5
3.8 0.25
2.7Min.
0.51Min.
7.62 0.25
6.4
0.25
0 -15
6 5 4
Orientation Mark
3
2
1
6 5 4
PIN NO. AND INTERNAL
CONNECTION DIAGRAM
Photocoupler
ELECTRO-OPTICAL CHARACTERISTICS (Ta=25℃ , unless otherwise noted)
IF=10mA
VR=5V -
V=0, f=1MHz
IC=1mA
IE=0.1mA
IC =0.1mA
IF=0, VCE=10V
VCE=0, f=1MHz
IF=10mA, IC=0.5mA
V=0, f=1MHz
VCE=10V, RL=100Ω
IC=2mA
*4. CTR=(IC/IF) X 100 (%)
- 10 ㎂
Collector Dark Current ICEO - - 50 nA
Reverse Current IR
Collector-Base Breakdown Voltage
Input-Output Isolation Resistance
Input-Output Capacitance
Capacitance
Current Transfer Ratio*4
Collector-Emitter Saturation Voltage
CCE
CIO
Input
Output
Forward Voltage
Capacitance
Collector-Emitter Breakdown Voltage
Emitter-Collector Breakdown Voltage V
V
V70
--
-
6
-
-
10 ㎲
10 ㎲
pF
%
V
pF
Symbol
VF
-
tr -RIO
0.15
1
-
80
Max.
1.30
-
-
Unit.
pF
-
-0.3
-
- Ω
3-
Typ.
1.15 V
K4N38 •K4N38A
Parameter Min.
-
30
10
3
1011
-
-
10-
Coupled
Rise Time
Fall Time
Condition
tf
CT
-
CTR IF=10mA, VCE=10V
RH=40~60%, V=500V
BVCEO
VCE(SAT)
BVECO
BVCBO
2/3
Photocoupler
K4N38ㆍK4N38A
3/3
Ambient Temperature Ta (℃ )
Forward Current vs.
Ambient Temperature
0
-20 0 20
Forward Current IF (mA)
10
20
40
30
50
40 60 100
Collector-Emitter Voltage VCE (V)
Collector Current vs.
Collector-Emitter Voltage
0 2 4 6
Collector Current IC (mA)
8 10
80
Dark Current ICEO (㎂)
Ambient Temperature Ta (℃ )
0
0.001
0.01
4020
0.1
1
8060 100
Dark Current vs.
Ambient Temperature
Collector Power Dissipation vs.
Ambient Temperature
Collector Power Dissipation PC (mW)
-20
0
50
100
150
200
250
Ambient Temperature Ta (℃ )
200 6040 10080
10
20
30
40
Output
Input
Test Circuit
VIN
R
RL
VO
VCC
Waveform
10%
90%
Switching Time Test Circuit
trtf
Ta=25℃
IF=30mA
IF=20mA
IF=10mA
IF=5mA
IF=1mA
VCE=10V
IF=20mA
Collector Current vs.
Ambient Temperature
IF=1mA
Ambient Temperature Ta (℃ )
-20
0
0 4020 60
100
10
Collector Current IC (mA)
1
IF=5mA
IF=10mA
80
Collector Current IC (mA)
Forward Current IF (mA)
0.1
0.001
0.01
1 10 100
Collector Current vs.
Forward Current
Ta=25℃
VCE=10V
1
0.1
10
100
1
Response Time tr, tf (μs)
0.1
Load Resistance RL (㏀)
0.1 1.0 5.0
VCE=10V
IC=2mA
Ta=25℃
500
10
100
Response Time vs.
Load Resistance
tr
tf
Ta=-55℃
Forward Voltage VF (V)
0.4
Forward Current IF (mA)
20
0
60
40
100
80
0.8 1.2
Ta=25℃
Ta=70℃
Forward Current vs.
Forward Voltage
1.6
