VISHAY
LH1520AB/ AAC/ AACTR
Document Number 83818
Rev. 1.2, 05-Nov-03
Vishay Semiconductors
www.vishay.com
1
i179034
8
7 6
5
1
2
3
4
S2'
S2
S1
S1'
S2'
S2
S1
S1'
DIP
SMD
Dual 1 Form A Solid State Relay
Features
Dual Channel (LH1500)
Current Limit Protection
Isolation Test Voltage 5300 V
RMS
Typical R
ON
20
Load Voltage 350 V
Load Current 150 mA
High Surge Capability
Linear, AC/DC Operation
Clean Bounce Free Switching
Low Power Consumption
Agency Approvals
UL - File No. E52744 System Code H or J
CSA - Certification 093751
BSI/BABT Cert. No. 7980
DIN EN 60747-5-5 (VDE 0884):2003-01 Available
with Option 1
FIMKO Approval
Applications
General Telecom Switching
- On/off Hook Control
- Ring Delay
- Dial Pulse
- Ground Start
- Ground Fault Protection
Instrumentation
Industrial Controls
Description
The LH1520 dual 1 Form A relays are SPST normally
open switches that can replace electromechanical
relays in many applications. They are constructed
using a GaAIAs LED for actuation control and an inte-
grated monolithic die for the switch output. The die,
fabricated in a high-voltage dielectrically isolated
technology is comprised of a photodiode array, switch
control circuitry, and MOSFET switches. In addition,
the LH1520 SSRs employ current-limiting circuitry,
enabling them to pass FCC 68.302 and other regula-
tory surge requirements when overvoltage protection
is provided.
Order Information
Part
Remarks
LH1520AAC
SMD-8, Tubes
LH1520AACTR
SMD-8, Tape and Reel
LH1520AB
DIP-8, Tubes
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2
Document Number 83818
Rev. 1.2, 05-Nov-03
VISHAY
LH1520AB/ AAC/ AACTR
Vishay Semiconductors
Absolute Maximum Ratings, T
amb
= 25 C
Stresses in excess of the absolute Maximum Ratings can cause permanent damage to the device. Functional operation of the device is
not implied at these or any other conditions in excess of those given in the operational sections of this document. Exposure to absolute
Maximum Ratings for extended periods of time can adversely affect reliability.
SSR
1)
Breakdown occurs between the output pins external to the package.
2)
Refer to Current Limit Performance Application Note for a discussion on
relay operation during transient currents.
Electrical Characteristics, T
amb
= 25 C
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are the result of engineering
evaluations. Typical values are for information only and are not part of the testing requirements.
Input
Output
Parameter
Test condition
Symbol
Value
Unit
LED continuous forward current
I
F
50
mA
LED reverse voltage
I
R
10 A
V
R
8.0
V
DC or peak AC load voltage
I
L
50 A
V
L
350
V
Continuous DC load current ,
one pole operating
I
L
150
mA
Continuous DC load current ,
two poles operating
I
L
110
mA
Peak load current (single shot),
Form B
t = 100 ms
I
P
2)
Ambient temperature range
T
amb
- 40 to + 85
C
Storage temperature range
T
stg
- 40 to + 150
C
Pin soldering temperature
t = 10 s max
T
sld
260
C
Input/output isolation test
voltage
t = 1.0 s, I
ISO
= 10
A max
V
ISO
5300
V
RMS
Pole-to-pole isolation voltage
(S1 to S2)
1)
, (dry air, dust free,
at sea level)
1600
V
Output power dissipation
(continuous)
P
diss
600
mW
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
LED forward current,
switch turn-on
I
L
= 100 mA, t = 10 ms
I
Fon
1.0
2.0
mA
LED forward current,
switch turn-off
V
L
= 300 V
I
Foff
0.2
1.1
mA
LED forward voltage
I
F
= 10 mA
V
F
1.15
1.26
1.45
V
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
ON-resistance
I
F
= 5.0 mA, I
L
= 50 mA
R
ON
12
20
25
OFF-resistance
I
F
= 0 mA, V
L
= 100 V
R
OFF
0.5
5000
G
Current limit
I
F
= 5.0 mA, t = 5.0 ms,
V
L
= 6.0 V
I
LMT
230
270
370
mA
Off-state leakage current
I
F
= 0 mA, V
L
= 100 V
0.02
200
nA
I
F
= 0 mA, V
L
= 350 V
1.0
A
VISHAY
LH1520AB/ AAC/ AACTR
Document Number 83818
Rev. 1.2, 05-Nov-03
Vishay Semiconductors
www.vishay.com
3
Transfer
Typical Characteristics
(T
amb
= 25
C unless otherwise specified)
Output capacitance
I
F
= 0 mA, V
L
= 1.0 V
55
pF
I
F
= 0 mA, V
L
= 50 V
10
pF
Pole-to-pole capacitance
(S1 to S2)
I
F
= 5.0 mA
0.5
pF
Switch offset
I
F
= 5.0 mA
0.15
V
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
Input/output capacitance
V
ISO
= 1.0 V
C
ISO
1.1
pF
Turn-on time
I
F
= 5.0 mA, I
L
= 50 mA
t
on
1.4
2.0
ms
Turn-off time
I
F
= 5.0 mA, I
L
= 50 mA
t
off
0.7
2.0
ms
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
Figure 1. Recommended Operating Conditions
Figure 2. LED Voltage vs. Temperature
ilh1520ab_00
60
80
0
40
110
100
20
-40
-20
0
20
40
60
80
Load
Current
(mA)
Ambient Temperature (C)
IFon = 2.0 mA
IFon = 3.0 mA
IFon = 4.0 mA
IFon = 5.0 to 20 mA
ilh1520ab_01
Ambient Temperature (C)
LED
Forward
Voltage
(V)
-40
-20
0
20
40
60
80
1.6
1.5
1.4
1.3
1.2
1.1
1.0
IF = 1.0 mA
IF = 20 mA
IF = 2.0 mA
IF = 50 mA
IF = 5.0 mA
IF = 10 mA
Figure 3. LED Forward Current vs. LED Forward Voltage
Figure 4. LED Reverse Current vs. LED Reverse Voltage
ilh1520ab_02
0
20
40
60
80
100
120
LED
Forward
C
urrent
(mA)
0
0.5
1
1.5
2
LED Forward Voltage (V)
T = 85 C
T = 25 C
T = -40 C
ilh1520ab_03
0
2
4
6
8
10
0
8
16
24
32
40
48
LED
Reverse
Current
(
A)
LED Reverse Voltage (V)
T = -40 C
T = 25 C
T = 85 C
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4
Document Number 83818
Rev. 1.2, 05-Nov-03
VISHAY
LH1520AB/ AAC/ AACTR
Vishay Semiconductors
Figure 5. LED Current for Switch Turn-on vs. Temperature
Figure 6. LED Dropout Voltage vs. Temperature
Figure 7. Current Limit vs. Temperature
ilh1520ab_04
-60
-40
-20
0
2 0
4 0
6 0
8 0
-40
-20
0
20
40
60
80
LED
Current
for
Switch
Turn-on
(%)
Norm.
@25
C
Temperature (C)
IL =100 mA
ilh1520ab_05
LED
Forward
Voltage
(V)
Temperature (C)
IL = 100 mA
-40
-20
0
20
40
60
80
1.25
1.2
1.15
1.1
1.05
1
ilh1520ab_06
-40
40
10
30
20
0
-20
-10
-40
-30
-20
0
20
40
60
Ambient Temperature (C)
80
IF = 5.0 mA
t = 5.0 ms
VL = SEE ELEC. CHAR.
Change
in
Current
Limit
(%)
Normalized
to
25
C
Figure 8. Load Current vs. Load Voltage
Figure 9. ON-Resistance vs. Temperature
Figure 10. Variation in ON-Resistance vs. LED Current
ilh1520ab_07
Load
Current
(mA)
Load Voltage (V)
0
100
200
300
400
0
1
2
3
4
5
T = -40 C
T = 25 C
T = 85 C
IF = 5 mA
ilh1520ab_08
Change
in
Ron
(%)
norm.
to
25
C
Temperature (C)
-40
-30
-20
-1
0
10
20
30
40
-40
-20
0
20
40
60
80
IF = 5 mA
IL = 50 mA
ilh1520ab_09
ON-Resistance
Variation
(%),
norm.
@I
F=5m
A
LED Forward Current (mA)
-1
0
1
2
3
4
0
4
8
12
16
20
IL = 50 mA
VISHAY
LH1520AB/ AAC/ AACTR
Document Number 83818
Rev. 1.2, 05-Nov-03
Vishay Semiconductors
www.vishay.com
5
Figure 11. Switch Capacitance vs. Applied Voltage
Figure 12. Insertion Loss vs. Frequency
Figure 13. Leakage Current vs. Applied Voltage
ilh1520ab_10
0
10
20
30
40
50
60 70
80
90
100
Applied Voltage (V)
Capacitance
(pF)
IF = 0 mA
50
40
30
20
10
0
ilh1520ab_11
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
Insertion
Loss
(dB)
Frequence (Hz)
102
103
104
105
RL = 600
ilh1520ab_12
0.01
0.1
1
10
100
1000
0
100
200
300
400
500
Off-State
Leakage
Current
(nA)
Load Voltage (V)
T = 85 C
T = 70 C
T = 25 C
T = 50 C
IF = 0 mA
Figure 14. Output Isolation
Figure 15. Switch Breakdown Voltage vs. Load Current
Figure 16. Switch Breakdown Voltage vs. Temperature
ilh1520ab_13
Isolation
(dB)
Frequency (Hz)
102
103
104
105
106
120
100
80
60
40
20
0
VP = 10 V
RL = 50
i
ilh1520ab_14
Load
Current
(
A)
Load Voltage (V)
T = -40 C
T = 25 C
T = 85 C
0
0
10
20
30
40
50
90
180
270
360
450
IF = 0 mA
IL <50 uA
ilh1520ab_15
-40
-20
0
20
40
60
80
Ambient Temperature (C)
8
0
4
2
6
-2
-6
-8
-4
Change
in
Breakdown
Voltage
(%)
Normalized
to
25
C
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