LH1556FP/ FPTR
Document Number 83871
Rev. 1.3, 26-Oct-04
Vishay Semiconductors
www.vishay.com
1
i179048
A
1
8
S1
7
S'1
6
S2
5
K
2
A
3
K
4
S'2
Pb
Pb-free
e3
Dual 1 Form A Solid State Relay
Features
Solid-state Relay (Equivalent to AQW210S)
- Typical R
ON
28
- Load Voltage 350 V
- Load Current 120 mA
- Current Limit Protection
- High Surge Capability
- 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
Lead-free component
Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC
Agency Approvals
UL1577, 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
See "Solid State Relays" ( Application Note 56)
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.
Order Information
Part
Remarks
LH1556FP
Tubes, SMD-8
LH1556FPTR
Tape and Reel, SMD-8
www.vishay.com
2
Document Number 83871
Rev. 1.3, 26-Oct-04
LH1556FP/ FPTR
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
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
6.0
V
DC or peak AC load voltage
I
L
50 A
V
L
350
V
Continuous DC load current
I
L
120
mA
Ambient temperature range
T
amb
- 40 to + 85
C
Storage temperature range
T
stg
- 40 to + 125
C
Soldering temperature
t = 10 s max.
T
sld
260
C
Isolation test voltage
t = 1.0 s
V
ISO
3000
V
RMS
Isolation resistance
V
IO
= 500 V, T
amb
= 25 C
R
IO
10
12
V
IO
= 500 V, T
amb
= 100 C
R
IO
10
11
Total power dissipation
P
diss
550
mW
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
LED forward current for switch
turn-on
I
L
= 100 mA, t = 10 ms
I
Fon
1.1
2.0
mA
LED forward current for switch
turn-off
V
L
= 300 V
I
Foff
0.2
0.6
mA
LED forward voltage
I
F
= 10 mA
V
F
1.0
1.18
1.45
V
Current limit
I
F
= 5.0 mA, t = 5.0 ms,
V
L
= 6.0 V
I
Limit
170
210
250
mA
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
ON-resistance, ac/dc:
Pin 3 () to 4 ()
I
F
= 5.0 mA, I
L
= 50 mA
R
ON
28
35
OFF-Resistance
I
F
= 0 mA, V
L
= 100 V
R
OFF
0.5
300
G
Off-state leakage current
I
F
= 0 mA, V
L
= 100 V
I
O
0.32
200
nA
I
F
= 0 mA, V
L
= 350 V
I
O
1.0
A
Output capacitance Pin 3 to 4
I
F
= 0 mA, V
L
= 1.0 V
C
O
55
pF
I
F
= 0 mA, V
L
= 50 V
C
O
10
pF
LH1556FP/ FPTR
Document Number 83871
Rev. 1.3, 26-Oct-04
Vishay Semiconductors
www.vishay.com
3
Transfer
Typical Characteristics (Tamb = 25
C unless otherwise specified)
Parameter
Test condition
Symbol
Min
Typ.
Max
Unit
Turn-on time
I
F
= 5.0 mA, I
L
= 50 mA
t
on
2.0
3.0
ms
Turn-off time
I
F
= 5.0 mA, I
L
= 50 mA
t
off
1.1
3.0
ms
Capacitance (input-output)
V
ISO
= 1.0 V
C
IO
0.6
pF
Figure 1. LED Voltage vs. Temperature
Figure 2. LED Current for Switch Turn-on vs. Temperature
ilh1529fp_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 = 5.0 mA
IF = 10 mA
IF = 50 mA
ilh1556fp_02
Ambient Temperature (C)
100
-60
80
60
40
-40
-40
20
-20
0
-20
0
20
40
60
80
IL = 100 mA
LED
Forward
Current
for
Switch
Turn-on
(%),
Normalized
to
25
C
Figure 3. ON-Resistance vs. Temperature
Figure 4. Current Limit vs. Temperature
ilh1556fp_03
-40
0
10
20
30
40
-10
-40
-20
-30
-20
0
20
40
60
Ambient Temperature (C)
80
IF = 5.0 mA
IL = 50 mA
Change
in
R
ON
(%)
ilh1556fp_04
-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
www.vishay.com
4
Document Number 83871
Rev. 1.3, 26-Oct-04
LH1556FP/ FPTR
Vishay Semiconductors
Figure 5. Switch Breakdown Voltage vs. Temperature
Figure 6. Switch Capacitance vs. Applied Voltage
Figure 7. Leakage Current vs. Applied Voltage
ilh1556fp_05
-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
ilh1556fp_06
0
20
40
Applied Voltage (V)
80
50
70
60
40
20
0
10
60
30
100
80
Capacitance
(pF)
ilh1556fp_07
0
50
100
Load Voltage (V)
150
200
250
300
350
400
0.1
1.0
10
100
Leakage
(pA)
T = 25 C
T = 50 C
T = 70 C
T = 85 C
Figure 8. Leakage Current vs. Applied Voltage
Figure 9. Turn-off Time vs. Temperature
Figure 10. Turn-on Time vs. LED Current
ilh1556fp_08
0
50
100
Load Voltage (V)
150
200
250
300
350
400
1
10
100
1000
10000
Leakage
(pA)
ilh1556fp_09
-80
-60
-40
-20
0
20
40
60
80
Change
in
Toff
(%)
Normalized
to
25
C
-40
-20
0
20
40
60
Ambient Temperature (C)
80
IF = 10 mA
IF = 8.0 mA
IF = 6.0 mA
IF = 3.0 mA
IF = 2.0 mA
IF = 5.0 mA
IF = 4.0 mA
ilh1556fp_10
0
1
2
3
4
5
6
7
Ton
(ms)
0
5
10
15
20
25
30
35
40
45
LED Forward Current (mA)
50
T = 85 C
T = 25 C
T = -45 C
LH1556FP/ FPTR
Document Number 83871
Rev. 1.3, 26-Oct-04
Vishay Semiconductors
www.vishay.com
5
Package Dimensions in Inches (mm)
i178024
.180
(4.57)
.080
(2.03)
.016
(.41)
.100
(2.54)
.020
(.50)
40
See Detail A
Lead
coplarity
.004 (.10)
max.
37
.015 (.39)
.010 (.25)
Detail A
(not to scale)
.016
(.41)
.084
(2.13)
.020 (.51)
pin
one
ID
.010 typ.
(.25)
.000.004
(.000.102)
.374 typ.
(9.50)
.029
(.74)
.274
(6.96)
.216
(5.48)
ISO Method A
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