CTH291GB
Half Pitch Mini-Flat Phototransistor Optocoupler
Features
High isolation 3750 V
RMS
Multiple CTR selection available
DC input with transistor output
Operating temperature range - 55 °C to 125 °C
RoHS compliance
REACH compliance
Halogen compliance
Regulatory Approvals
UL - UL1577 (Pending Approval)
VDE - EN60747-5-5 (Pending Approval)
CQC – GB4943.1, GB8898 (Pending Approval)
IEC60065, IEC60950 (Pending Approval)
Description
The CTH291GB series of general purpose
Phototransistor Optocoupler
optocoupler consists of a photo transistor optically
coupled to a gallium arsenide Infrared-emitting diode
in a 4-lead half pitch Mini-Flat package.
Applications
Switch mode power supplies
Computer peripheral interface
Microprocessor system interface
Package Outline
Schematic
CTH291
CTH Micro
Proprietary & Confidential
Page 1
Rev 1
Jun, 2018
CTH291GB
Half Pitch Mini-Flat Phototransistor Optocoupler
Absolute Maximum Rating at 25
o
C
Symbol
V
ISO
P
TOT
T
OPR
T
STG
T
SOL
Isolation voltage
Total power dissipation
Operating temperature
Storage temperature
Soldering temperature
Phototransistor Optocoupler
Ratings
3750
200
-55 ~ +125
-55 ~ +150
260
Parameters
Units
V
RMS
mW
o
C
o
C
o
C
Notes
Emitter
I
F
I
F(TRANS)
V
R
P
D
Forward current
Peak transient current
Reverse voltage
Emitter power dissipation
(≤1μs P.W,300pps)
60
1000
6
70
mA
mA
V
mW
Detector
P
C
B
VCEO
B
VECO
I
C
Detector power dissipation
Collector-Emitter Breakdown Voltage
Emitter-Collector Breakdown Voltage
Collector Current
150
80
6
50
mW
V
V
mA
CTH Micro
Proprietary & Confidential
Page 2
Rev 1
Jun, 2018
CTH291GB
Half Pitch Mini-Flat Phototransistor Optocoupler
Electrical Characteristics
T
Emitter Characteristics
Symbol
V
F
I
R
C
IN
Parameters
Forward voltage
Reverse Current
Input Capacitance
A
= 25°C (unless otherwise specified)
Phototransistor Optocoupler
Test Conditions
I
F
=10mA
V
R
=6V
f= 1MHz
Min
-
-
-
Typ
1.25
-
10
Max
1.4
5
30
Units
V
µA
pF
Notes
Detector Characteristics
Symbol
B
VCEO
B
VECO
I
CEO
Parameters
Collector-Emitter Breakdown
Emitter-Collector Breakdown
Collector-Emitter Dark Current
V
CE
= 48V,Ta = 85˚C
-
-
50
Test Conditions
I
C
= 100µA
I
E
= 100µA
V
CE
= 48V, I
F
=0mA
Min
80
7
-
Typ
-
-
-
Max
-
-
100
Units
V
V
nA
μA
Notes
Transfer Characteristics
Symbol
CTR
V
CE(SAT)
Voltage
Parameters
Current Transfer Ratio
Collector -Emitter Saturation
Test Conditions
I
F
=5mA,V
CE
=5V
I
F
= 1mA, I
C
= 0.2mA
Min
100
-
5x10
10
-
Typ
-
-
-
0.25
Max
400
0.4
-
1
Units
%
V
Ω
pF
Notes
R
IO
C
IO
Isolation Resistance
Isolation Capacitance
V
IO
= 500V
DC
f= 1MHz
CTH Micro
Proprietary & Confidential
Page 3
Rev 1
Jun, 2018
CTH291GB
Half Pitch Mini-Flat Phototransistor Optocoupler
Switching Characteristics
Symbol
t
r
t
f
t
on
t
off
Rise Time
Fall Time
Turn-on time
Turn-off time
I
C
= 2mA, V
CE
= 2V
R
L
= 100Ω
Phototransistor Optocoupler
Test Conditions
Min
-
-
Parameters
Typ
5
6
8
7
Max
16
Units
µs
Notes
16
20
µs
20
CTH Micro
Proprietary & Confidential
Page 4
Rev 1
Jun, 2018
CTH291GB
Half Pitch Mini-Flat Phototransistor Optocoupler
Typical Characteristic Curves
100
Phototransistor Optocoupler
100000
Forward Current vs. Forward Voltage
I
CEO
, Collector Dark Current (nA)
Collector Dark Current vs. Ambient Temperature
10000
I
F
, Forward Current (mA)
10
T
A
=125 C
o
T
A
=-55 C
o
1000
V
CE
=80V
100
V
CE
=5V
10V
60V
40V
20V
1
T
A
=25 C
o
10
1
0.1
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
0.1
-55 -40
-20
0
20
40
60
80
o
100
120 125
V
F
, Forward Voltage (V)
Figure 1
T
A
, Ambient Temperature ( C)
Figure 2
1.4
Normalized CTR vs. Forward Current
Normalized to
I
F
=5mA,V
CE
=5V
Collector Current vs. Ambient Temperature
V
CE
=5V
50mA
CTR,
Normalized Current Transfer Ratio
1.2
1.0
0.8
I
C
, Collector Current (mA)
T
A
=25 C
o
100
20mA
10mA
5mA
10
10V
0.6
2mA
I
F
=1mA
1
5V
0.4
0.2
0.0
0.1
2V
V
CE
=1V
1
10
100
0.1
-55 -40
-20
0
20
40
60
80
o
100
120 125
I
F
, Foward Current (mA)
Figure 3
T
A
, Ambient Temperature ( C)
Figure 4
1.6
Normalized CTR vs Ambient Temperature
V
CE(SAT)
,
Collector-Emitter Saturation Voltage (V)
10mA
20mA
5mA
Normalizad to
I
F
=5mA,V
CE
=5V
T
A
=25 C
o
CTR,
Normalized Current Transfer ratio
50
o
Collector-Emitter Stauration Voltage
vs. Collector Current
T
A
=25 C
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-55
10
I
F
=0.5mA
1
1mA
2mA
5mA
2mA
I
F
=1mA
50mA
0.1
20mA
10mA
0.01
-40
-20
0
20
40
60
T
A
, Ambient Temperature ( C)
Figure 5
o
80
100
120 125
1E-3
0.1
1
10
50
I
C
, Collector Current (mA)
Figure 6
CTH Micro
Proprietary & Confidential
Page 5
Rev 1
Jun, 2018
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