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Photocoupler Part Name: LA212
Features SOP package 4 Pin type in miniature design 80% minimum current transfer ratio 1500V rms Input/Output isolation AC input. Applications Telephones Programmable controllers System appliances, measuring instruments. Signal transmission between circuits of different potentials and impedances.
Dimensions(Unit: mm inch)
4 3
4
3
Letex
LA212
16A
1
1 2
2
1. 2. 3. 4.
LED Anode, Cathode LED Cathode, Anode Emitter Collector
-1-
Letex Technology Corp.
Photocoupler Part Name: LA212
Absolute Maximum Ratings (Ambient Temperature: 25) Item Symbol Rating Forward Current Input Reverse Voltage Peak Forward Current Collector to Emitter Voltage Emitter to Collector Voltage Output Collector Current Power Dissipation I/O Breakdown Voltage Power Dissipation Storage Temperature Operating Temperature Soldering Temperature IF VR IFP Vceo Veco Ic Pc VI/O PD Tstg Top TSol 50 5 1 40 6 50 150 1500 200 -55 to +125 -55 to +100 260
Units mA V A V V mA mW Vrms mW
Note
Ic=1mA, IB=0 IE=100A, IB=0
RH=60%, 1min
10 seconds max.
Electrical Specifications (Ambient Temperature: 25) Item Symbol MIN. TYP. Forward Voltage Reverse Current Junction Capacitance C-E Breakdown Voltage E-C Breakdown Voltage Collector Dark Current VF IR Ct Vceo Veco Iceo A CTR B C D Vce(sat) RI/O CI/O
Input
MAX. 1.4 -
Units V A pF V V nA
Conditions IF= 20mA V=0, f=1.0KHz Ic=0.5mA Ie=0.1mA Vce=20V, IF=0
1.2 25 35 5
Output
100
BIN GRADE
Current Transfer Ratio
Coupled
80 130 200 300 10 1.0 6 6
9
Collector Saturation Voltage Isolation Resistance Isolation Capacitance Rise Time Fall Time
160 260 240 600 0.4
IF= 1mA, Vce=5V
tr tf
V pF s s
IF=20mA, Ic=1mA V=500V DC V=0, f=1.0MHz
Vce=5V, Ic=2mA, RL=100
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Letex Technology Corp.
Photocoupler Reference Data
Forward current Vs. Ambient temperature
60
Collector power dissipation Vs. Ambient temperature
Collector power dissipation (mW)
Peak forward current Vs. Duty ratio
50
2000
Peak forward current ( mA)
150
1000 500 200 100 50 20
Pulse width 100us Ta = 25
Forward current (mA)
40
30
100
20
50
10
0 -25 0 25 50 75 100 125
0 -25 0 25 50 75 100 125
10 5 10
-3
2
5 10
-2
2
5 10
-1
2
5 10
0
Ambient temperature ()
Ambient temperature ()
Duty ratio
Forward current Vs. Forward voltage
500 200
Ta = 75 50 25
Current transfer ratio Vs. Forward current
200 180 Vce = 5V Ta = 25 30
Collector current Vs. Collector-Emitter voltage
IF = 30mA 25 Ta = 25 20mA Pc(Max) 20
0 25
100 50
140 120
CTR (%)
100 80 60 40 20 1
Collector current (mA)
Forward current (mA)
160
15
20 10 5 2 1 0 0.5 1.0 1.5 2.0 2.5 3.0
10mA
10 5mA 5
0 1 2 5 10 20 50 0 1 2 3 4 5 6 7 8 9
Forward voltage (V)
Forward current (mA)
Collector-Emitter voltage (V)
Relative CTR Vs. Ambient temperature
150 IF = 5mA Vce = 5V
Collector-Emitter saturation voltage Vs. Ambient temperature
0.16 10 -5
Collector dark current Vs. Ambient temperature
Vce = 20V
Collector-Emitter saturation voltage (V)
Collector dark current (A)
100
0.14 0.12 0.10 0.08 0.06 0.04 0.02 0
IF = 20mA Ic = 1mA
10 -6 10 -7 10 -8 10 -9 10 -10 10 -11
Relative CTR ( %)
100
50
0 -25 0 25 50 75 100
-25
0
25
50
75
-25
0
25
50
75
100
Ambient temperature ()
Ambient temperature ()
Ambient temperature ()
Collector-Emitter saturation voltage Vs. Forward current
1.2 Ta = 25
Ic=0.5mA
Response time Vs. Load resistance
Test circuit for resopnse time
Collector-Emitter satureation voltage (V)
1.0
500 200 100 Vce = 2V Ic = 2mA Ta = 25
Vcc Input Input RD RL Output Output 10% 90%
Response time ( s)
30 40 50 60
0.8
3mA 5mA 1mA 7mA
50 20 10 5 2 1 0.5 0.2
0.6
0.4
0.2
0 0 10 20
0.1 0.1 0.2 0.5 1 2 5 10
Forward current (mA)
Load resistance (k )
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Letex Technology Corp.

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