PHOTOCOUPLER
KB844
GENERAL PURPOSE
HIGH ISOLATION VOLTAGE
SINGLE TRANSISTOR TYPE
PHOTOCOUPLER SERIES
FEATURES
1.AC Input
0 Vrms)
2.High isolation voltage between input and output (Viso=5000 Vr.m.s)
3.Compact dual-in-line package
KB844:4-channel type
4.Recognized by UL and CUL, file NO. E225308
5.Approved by VDE 0884 Teil2(NO:40006364)
(Creepage distance between input and output:7mm or more)
6.RoHS Compliant.
DESCRIPTION
1.The KB844(4-channel) is optically coupled isolators containing two GaAs light emitting
diode and an NPN silicon phototransistor.
2.The lead pitch is 2.54mm.
APPLICATIONS
1.Computer terminals.
2.Registers, copiers, automatic vending machines.
3.System appliances, measuring instruments.
4.Programmable logic controller.
5.Signal transmission between circuits of different potentials and impedances.
SPEC NO: DSAD1536
APPROVED: J. Lu
REV NO: V.5
CHECKED: Tracy Deng
DATE: MAR/14/2005
DRAWN: S.H.CHEN
PAGE: 1 OF 8
ERP:1205000023
PHOTOCOUPLER
KB844
½PACKAGE
DIMENSIONS (UNIT:mm)
DIP Type
KB844
Top View
2.54 [0.1] 0.25
16
KB814
KB814
KB814
KB814
Internal connection
diagram
9
6.5[0.256]
16 15 14 13 12 11 10
9
Anode
mark
1
8
0.9 [0.035] 0.2
1.2 [0.047] 0.3
3.5 [0.138]
1
2
3
4
5
6
7
8
0.4[0.015]MIN.
7.62 [0.3] 0.3
2.7 [0.106]
19.82 [0.78]
7[0.276]
3.0[0.118]
/
0.5 [0.02] 0.1
ð
= 0 to 13
/
0.25 [0.01] 0.1
1, 3, 5, 7. Anode,Cathode 9, 11, 13, 15. Emitter
2, 4, 6, 8. Anode,Cathode 10, 12, 14, 16. Collector
C)
* Absolute Maximum Ratings (Ta=25
±
Parameter
Forward current
Input
Power dissipation
Collector-emitter voltage
Output
Emitter-collector voltage
Collector current
Collector power dissipation
Total power dissipation
*1
TOLERANCE :
±0.5[±0.02]
UNLESS OTHERWISE NOTED.
±
Symbol
IF
P
V
CEO
V
ECO
IC
PC
Ptot
Viso
Topr
Tstg
Tsol
Rating
²
50
70
35
6
50
150
200
Unit
mA
mW
V
V
mA
mW
mW
V
r.m.s
V
rms
±
C
±
C
±
C
Isolation voltage
5000
-30~+100
-55~+125
260
Operating temperature
Storage temperature
*2
Soldering temperature
*1
*2
40 to 60%RH, AC for 1 minute
For 10 seconds
SPEC NO: DSAD1536
APPROVED: J. Lu
REV NO: V.5
CHECKED: Tracy Deng
DATE: MAR/14/2005
DRAWN: S.H.CHEN
PAGE: 2 OF 8
ERP:1205000023
PHOTOCOUPLER
KB844
C)
* Electro-optical Characteristics
(Ta=25
±
Parameter
Forward voltage
Input
Output
Peak forward voltage
Collector dark current
Current transfer ratio
Transfer
charact-
eristics
Collector-emitter saturation voltage
Rise time
Response time
Fall time
Symbol
V
F
V
FM
I
CEO
CTR
V
CE(
sat
)
t
r
t
f
Conditions
I
F
=
²
20mA
I
FM
=
²
0.5A
Min. Typ.
1.2
Max. Unit
1.4
3.0
10 -7
20
0.1
4
3
300
0.2
18
18
V
V
A
%
V
CE
=20V,I
F
=0mA
I
F
=
²
20mA, I
C
=1mA
V
CE
=2V, I
C
=2mA
R
L
=100
è
I
F
=
²
1mA, V
CE
=5V
ô
ô
V
Classification table of current transfer ratio is shown below.
Ic
CTR= I
F
X 100%
Model NO.
KB844L
KB844A
KB844B
KB844LA
KB844AB
KB844
Rank mark
L
A
B
L or A
A or B
L,A,B or No mark
CTR(%)
20~60
50~150
120~300
20~150
50~300
20~300
SPEC NO: DSAD1536
APPROVED: J. Lu
REV NO: V.5
CHECKED: Tracy Deng
DATE: MAR/14/2005
DRAWN: S.H.CHEN
PAGE: 3 OF 8
ERP:1205000023
PHOTOCOUPLER
KB844
Fig. 1 Current Transfer Ratio vs.
Forward Current
Fig. 2 Forward Current vs.
Forward voltage
Fig. 3 Collector Current vs.
Collector-emitter Voltage
Fig. 4 Relative Current Transfer Ratio
vs. Ambient Temperature
Fig. 5 Collector-emitter Saturation
Voltage vs. Ambient Temperature
Fig. 6 Collector Dark Current vs.
Ambient Temperature
SPEC NO: DSAD1536
APPROVED: J. Lu
REV NO: V.5
CHECKED: Tracy Deng
DATE: MAR/14/2005
DRAWN: S.H.CHEN
PAGE: 4 OF 8
ERP:1205000023
PHOTOCOUPLER
KB844
Fig. 7 Forward Current vs.
Ambient Temperature
Fig. 8 Collector Power Dissipation vs.
Ambient Temperature
Fig. 9 Response Time vs.
Load Resistance
Test Circuit for Response Time
KΩ
Fig. 10 Frequency Response
Test Circuit for Frequency Response
Ω
Ω
Ω
SPEC NO: DSAD1536
APPROVED: J. Lu
REV NO: V.5
CHECKED: Tracy Deng
DATE: MAR/14/2005
DRAWN: S.H.CHEN
PAGE: 5 OF 8
ERP:1205000023
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