VISHAY
LH1556FP/ FPTR
Vishay Semiconductors
Dual 1 Form A Solid State Relay
Features
• Solid-state Relay (Equivalent to AQW210S)
- Typical R
ON
28
Ω
- Load Voltage 350 V
- Load Current 120 mA
- Current Limit Protection
- High Surge Capability
- Linear, AC/DC Operation
- Clean Bounce Free Switching
- Low Power Consumption
- High Reliability Monolithic Detector
• Two Independent Relays in a Single Package
• Package - FLAT PAK
• Isolation Test Voltage 3000 V
RMS
A
1
K
2
A
3
K
4
8
S1
7
S’1
6
S2
5
S’2
i179048
Description
The LH1556FP is robust, ideal for telecom and
ground fault applications. It contains two SPST nor-
mally open switches (1 Form A) that replace electro-
mechanical relays in many applications. It is
constructed using a GaAs LED for actuation control
and an integrated monolithic die for the switch output.
The die, fabricated in a high-voltage dielectrically iso-
lated BCDMOS technology, is comprised of a photo-
diode array, switch control circuitry and MOSFET
switches. In addition, it employs current-limiting cir-
cuitry which meets FCC 68.302 and other regulatory
voltage surge requirements when overvoltage protec-
tion is provided.
See Application Note 56
Agency Approvals
• UL - File No. E52744 System Code S
• BSI/BABT Cert. No. 7980
Applications
General Telecom Switching
- On/off Hook Control
- Ring Relay
- Ground Start
Industrial Controls
- Triac Predriver
- Output Modules
Peripherals
- Transducer Driver
Instrumentation
- Automatic Tuning/Balancing
- Flying Capacitor
- Analog Multiplexing
Order Information
Part
LH1556FP
LH1556FPTR
Remarks
SMD-8, Tubes
SMD-8, Tape and Reel
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
Parameter
LED continuous forward current
LED reverse voltage
DC or peak AC load voltage
Continuous DC load current
I
R
≤
10
µA
I
L
≤
50
µA
Test condition
Symbol
I
F
V
R
V
L
I
L
Value
50
6.0
350
120
Unit
mA
V
V
mA
Document Number 83871
Rev. 1.2, 05-Nov-03
www.vishay.com
1
LH1556FP/ FPTR
Vishay Semiconductors
Parameter
Ambient temperature range
Storage temperature range
Soldering temperature
Isolation test voltage
Isolation resistance
t = 10 s max.
t = 1.0 s
V
IO
= 500 V, T
amb
= 25 °C
V
IO
= 500 V, T
amb
= 100 °C
Total power dissipation
Test condition
Symbol
T
amb
T
stg
T
sld
V
ISO
R
IO
R
IO
P
diss
Value
- 40 to + 85
- 40 to + 125
260
3000
≥
10
12
≥
10
11
550
VISHAY
Unit
°C
°C
°C
V
RMS
Ω
Ω
mW
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
Parameter
LED forward current for switch
turn-on
LED forward current for switch
turn-off
LED forward voltage
Current limit
Test condition
I
L
= 100 mA, t = 10 ms
V
L
= ± 300 V
I
F
= 10 mA
I
F
= 5.0 mA, t = 5.0 ms,
V
L
= ± 6.0 V
Symbol
I
Fon
I
Foff
V
F
I
Limit
0.2
1.0
170
Min
Typ.
1.1
0.6
1.18
210
1.45
250
Max
2.0
Unit
mA
mA
V
mA
Output
Parameter
ON-resistance, ac/dc:
Pin 3 (±) to 4 (±)
OFF-Resistance
Off-state leakage current
Output capacitance, pin 3 to 4
Test condition
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 0 mA, V
L
= ± 350 V
I
F
= 0 mA, V
L
= 1.0 V
I
F
= 0 mA, V
L
= 50 V
Symbol
R
ON
R
OFF
I
O
I
O
C
O
C
O
55
10
0.5
Min
Typ.
28
300
0.32
200
1.0
Max
35
Unit
Ω
GΩ
nA
µA
pF
pF
Transfer
Parameter
Turn-on time
Turn-off time
Input/output capacitance
Test condition
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 5.0 mA, I
L
= 50 mA
V
ISO
= 1.0 V
Symbol
t
on
t
off
C
IO
Min
Typ.
2.0
1.1
0.6
Max
3.0
3.0
Unit
ms
ms
pF
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2
Document Number 83871
Rev. 1.2, 05-Nov-03
VISHAY
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
1.6
Change in Current Limit (%)
Normalized to 25 °C
LH1556FP/ FPTR
Vishay Semiconductors
40
30
20
10
0
-10
-20
-30
40
60
80
-40
-40
ilh1556fp_04
LED Forward Voltage (V)
1.5
1.4
1.3
1.2
1.1
IF = 1.0 mA
IF = 2.0 mA
IF = 5.0 mA
IF = 10 mA
IF = 20 mA
IF = 50 mA
IF = 5.0 mA
t = 5.0 ms
VL = SEE ELEC. CHAR.
1.0
-40
ilh1529fp_01
-20
0
20
-20
0
20
40
60
80
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 1. LED Voltage vs. Temperature
Figure 4. Current Limit vs. Temperature
80
60
40
20
0
-20
-40
-60
-40
IL = 100 mA
Change in Breakdown Voltage (%)
Normalized to 25 °C
100
LED Forward Current for Switch
Turn-on (%), Normalized to 25 °C
8
6
4
2
0
-2
-4
-6
-8
-40
ilh1556fp_05
-20
0
20
40
60
80
-20
0
20
40
60
80
ilh1556fp_02
Ambient Temperature (°C)
Ambient Temperature (°C)
Figure 2. LED Current for Switch Turn-on vs. Temperature
Figure 5. Switch Breakdown Voltage vs. Temperature
40
30
Change in RON (%)
80
IF = 5.0 mA
IL = 50 mA
Capacitance (pF)
70
60
50
40
30
20
10
0
20
10
0
-10
-20
-30
-40
-40
-20
0
20
40
60
80
0
ilh1556fp_06
20
40
60
80
100
ilh1556fp_03
Ambient Temperature (°C)
Applied Voltage (V)
Figure 3. ON-Resistance vs. Temperature
Figure 6. Switch Capacitance vs. Applied Voltage
Document Number 83871
Rev. 1.2, 05-Nov-03
www.vishay.com
3
LH1556FP/ FPTR
Vishay Semiconductors
VISHAY
100
T = 85 °C
7
6
5
Ton (ms)
Leakage (pA)
10
T = 50 °C
1.0
T = 70 °C
4
3
2
1
T = 85 °C
T = 25 °C
T = -45 °C
T = 25 °C
0.1
0
ilh1556fp_07
0
50
100 150
200 250
300 350
400
ilh1556fp_10
0
5
10 15
20 25 30 35 40
45 50
Load Voltage (V)
LED Forward Current (mA)
Figure 7. Leakage Current vs. Applied Voltage
Figure 10. Turn-on Time vs. LED Current
10000
1000
Leakage (pA)
100
10
1
0
ilh1556fp_08
50
100
150
200 250 300 350
400
Load Voltage (V)
Figure 8. Leakage Current vs. Applied Voltage
80
60
Change in Toff (%)
Normalized to 25 °C
IF = 10 mA
IF = 8.0 mA
IF = 6.0 mA
40
20
0
-20
-40
-60
-80
-40
-20
IF = 5.0 mA
IF = 4.0 mA
IF = 3.0 mA
IF = 2.0 mA
0
20
40
60
80
ilh1556fp_09
Ambient Temperature (°C)
Figure 9. Turn-off Time vs. Temperature
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Document Number 83871
Rev. 1.2, 05-Nov-03
VISHAY
Package Dimensions in Inches (mm)
LH1556FP/ FPTR
Vishay Semiconductors
.029
(.74)
pin
one
ID
.180
(4.57)
ISO Method A
Detail A
(not to scale)
)
13
(2. )
4
1
.08 6 (.4
1
.0
.020 (.51)
.374 typ.
(9.50)
See Detail A
.000–.004
(.000–.102)
.080
(2.03)
.016
(.41)
.100
(2.54)
Lead
coplarity
.004 (.10)
max.
.216
(5.48)
.010 (.25)
.274
(6.96)
.015 (.39)
.010 typ.
(.25)
40°
.020
(.50)
3°–7°
i178024
Document Number 83871
Rev. 1.2, 05-Nov-03
www.vishay.com
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