LH1556AAC
www.vishay.com
Vishay Semiconductors
Dual 1 Form A Solid-State Relay
DIP
S1
S1'
FEATURES
• Dual channel (LH1546)
• Current limit protection
• Isolation test voltage 5300 V
RMS
S2
S2'
• Typical R
ON
28
Ω
• Load voltage 350 V
• Load current 120 mA
• High surge capability
• Clean bounce free switching
• Low power consumption
• SMD lead available on tape and reel
SMD
S1
8
S1' S2
7
6
S2'
5
i179034_2
1
2
3
4
• Material categorization: For definitions of compliance
please see
www.vishay.com/doc?99912
APPLICATIONS
DESCRIPTION
The LH1556 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 integrated 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 LH1556 SSRs employ
current-limiting circuitry, enabling them to pass lightning
surge testing as per ANSI/TIA-968-B and other regulatory
surge requirements when overvoltage protection is
provided.
• General telecom switching
- On/off hook control
- Ring relay
- Dial pulse
- Ground start
- Ground fault protection
• Instrumentation
• Industrial controls
AGENCY APPROVALS
• UL1577 file no. E52744 system code H, double protection
• CSA certification no. 093751
ORDERING INFORMATION
L
H
1
5
5
6
A
ELECTR.
VARIATION
#
#
T
R
DIP
SMD
PART NUMBER
PACKAGE
CONFIG.
TAPE AND
REEL
UL, CSA
LH1556AAC
7.62 mm
> 0.1 mm
PACKAGE
SMD-8, tubes
Rev. 1.8, 10-Mar-14
Document Number: 83842
1
For technical questions, contact:
optocoupleranswers@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1556AAC
www.vishay.com
Vishay Semiconductors
ABSOLUTE MAXIMUM RATINGS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
INPUT
LED continuous forward current
LED reverse voltage
OUTPUT
DC or peak AC load voltage
Continuous DC load current, one pole operating
Continuous DC load current, two poles operating
SSR
Peak load current (single shot)
Ambient temperature range
Storage temperature range
Pin soldering temperature
(2)
TEST CONDITION
SYMBOL
I
F
VALUE
50
8.0
350
120
110
(1)
UNIT
mA
V
V
mA
mA
mA
°C
°C
°C
V
RMS
mW
I
R
≤
10 μA
I
L
≤
50 μA
V
R
V
L
I
L
I
L
t = 100 ms
I
P
T
amb
T
stg
-40 to +85
-40 to +150
260
5300
550
t = 10 s max.
T
sld
V
ISO
P
diss
Input to output isolation voltage
Output power dissipation (continuous)
Notes
• 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 the time can adversely affect reliability.
(1)
Refer to current limit performance application note for a discussion on relay operation during transient currents.
ELECTRICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
INPUT
LED forward current, switch turn-on
LED forward current, switch turn-off
LED forward voltage
OUTPUT
On-resistance AC/DC: pin 4 (±) to 6 (±)
On-resistance DC: pin 4, 6 (+) to 5 (-)
Off-resistance
Current limit AC/DC
Off-state leakage current
Output capacitance pin 4 to 6
Switch offset
TRANSFER
Capacitance (input to output)
V
ISO
= 1.0 V
C
IO
0.67
pF
Note
• 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.
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 5.0 mA, I
L
= 100 mA
I
F
= 0 mA, V
L
= ± 100 V
I
F
= 5.0 mA, V
L
= ± 6.0 V, t = 5.0 ms
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
I
F
= 5.0 mA
R
ON
R
ON
R
OFF
I
LMT
I
O
I
O
C
O
C
O
V
OS
0.5
170
28
7.0
300
210
0.35
0.096
18
6.7
0.3
250
200
1.0
35
10
Ω
Ω
GΩ
mA
nA
μA
pF
pF
μV
I
L
= 100 mA, t = 10 ms
V
L
= ± 350 V
I
F
= 10 mA
I
Fon
I
Foff
V
F
0.2
1.15
1.1
1.0
1.26
1.45
2.0
mA
mA
V
TEST CONDITION
SYMBOL
MIN.
TYP.
MAX.
UNIT
SWITCHING CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
PARAMETER
Turn-on time
Turn-off time
TEST CONDITION
I
F
= 5.0 mA, I
L
= 50 mA
I
F
= 5.0 mA, I
L
= 50 mA
SYMBOL
t
on
t
off
MIN.
TYP.
1.14
0.71
MAX.
3.0
3.0
UNIT
ms
ms
Rev. 1.8, 10-Mar-14
Document Number: 83842
2
For technical questions, contact:
optocoupleranswers@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1556AAC
www.vishay.com
TYPICAL CHARACTERISTICS
(T
amb
= 25 °C, unless otherwise specified)
Vishay Semiconductors
120
100
10
Load Current (mA)
80
60
40
20
I
FON
= 5.0 to 20 mA
I
FON
= 2.0 mA
I
FON
= 4.0 mA
I
FON
= 3.0 mA
LED Current (µA)
8
6
T = - 40 °C
T = 25 °C
T = 85 °C
4
2
0
- 40
ilh1556ab_00
- 20
0
20
40
60
80
0
0
20
40
60
80
100
Ambient Temperature (°C)
ilh1556ab_03
Reverse LED Voltage (V)
Fig. 1 - Recommended Operating Conditions
Fig. 4 - LED Reverse Current vs. LED Reverse Voltage
1.6
LED Current for Switch Turn-on (%),
60
45
I
L
= 100 mA
LED Forward Voltage (V)
1.5
I
F
= 20 mA
1.4
1.3
1.2
I
F
= 1.0 mA
1.1
I = 2.0 mA
F
1.0
- 40
Normalized to 25 °C
I
F
= 50 mA
30
15
0
- 15
- 30
- 45
- 40
- 20
0
20
40
60
80
I
F
= 5.0 mA
I
F
= 10 mA
0
20
40
60
80
- 20
ilh1556ab_01
T
A
- Ambient Temperature (°C)
ilh1556ab_04
Temperature (°C)
Fig. 2 - LED Voltage vs. Temperature
Fig. 5 - LED Current for Switch Turn-on vs. Temperature
120
1.26
LED Forward Current (mA)
LED Forward Voltage (V)
100
80
60
40
20
0
0
0.5
1
1.5
2
T = 85 °C
T = 25 °C
T = - 40 °C
1.22
1.18
1.14
1.10
1.06
1.02
- 40
I
L
= 100 mA
- 20
0
20
40
60
80
ilh1556ab_02
LED Forward Voltage (V)
ilh1556ab_05
Temperature (°C)
Fig. 3 - LED Forward Current vs. LED Forward Voltage
Fig. 6 - LED Dropout Voltage vs. Temperature
Rev. 1.8, 10-Mar-14
Document Number: 83842
3
For technical questions, contact:
optocoupleranswers@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1556AAC
www.vishay.com
Vishay Semiconductors
300
2.5
Switch Offset Voltage (mV)
I
F
= 5 mA
250
2.0
1.5
1.0
0.5
0.0
I
F
= 5 mA
Current Limit (µA)
200
150
100
50
0
0
1
2
3
4
5
T = - 40 °C
T = 25 °C
T = 85 °C
25
ilh1556ab_09
35
45
55
65
75
85
ilh1556ab_06
Load Voltage (V)
Temperature (°C)
Fig. 7 - Load Current vs. Load Voltage
Fig. 10 - Switch Offset Voltage vs. LED Current
Change in R
on
(%), Norm. to 25 °C
40
40
30
20
10
0
- 10
- 20
- 30
- 40
- 40
- 20
0
20
40
60
80
I
F
= 5 mA
I
L
= 50 mA
Change in Current Limit (%)
Norm. to 25 °C
30
20
10
0
- 10
- 20
- 30
- 40
- 20
0
20
40
60
80
I
F
= 5 mA
V
L
= 6 V
ilh1556ab_07
Temperature (°C)
ilh1556ab_10
Temperature (°C)
Fig. 8 - Current Limit vs. Temperature
Fig. 11 - On-Resistance vs. Temperature
60
8
AC/DC R
on
Variation (%)
Norm. at I
F
= 5 mA
50
Load Current (µA)
I
F
= 0 mA
I
L
< 50 µA
6
I
F
= 5 mA
4
40
30
20
10
0
0
100
200
300
400
500
T = - 40 °C
T = 25 °C
T = 85 °C
2
0
-2
0
4
8
12
16
20
ilh1556ab_08
Breakdown Voltage (V)
ilh1556ab_11
LED Forward Current (mA)
Fig. 9 - Switch Breakdown Voltage vs. Load Current
Fig. 12 - Variation in On-Resistance vs. LED Current
Rev. 1.8, 10-Mar-14
Document Number: 83842
4
For technical questions, contact:
optocoupleranswers@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
LH1556AAC
www.vishay.com
Vishay Semiconductors
50
40
1000
Leakage Current (nA)
I
F
= 0 mA
I
F
= 0 mA
100 T = 85 °C
T = 70 °C
T = 50 °C
10
Capacitance (pF)
30
20
10
0
0
20
40
60
80
100
1
T = 20 °C
0.1
0
50
100
150
200 250
300 350
ilh1556ab_12
Applied Voltage (V)
ilh1556ab_15
Load Voltage (V)
Fig. 13 - Switch Capacitance vs. Applied Voltage
Fig. 16 - Leakage Current vs.
Applied Voltage at Elevated Temperatures
0.5
Insertion Loss (dB)
R
L
= 600
Ω
I
F
= 5 mA
Change in Breakdown Voltage (%)
Norm. to 25 °C
10
4
10
5
0.6
8
6
4
2
0
-2
-4
-6
-8
- 10
- 40
- 20
0
20
40
60
80
0.4
0.3
0.2
0.1
0.0
10
2
10
3
ilh1556ab_13
Frequency (Hz)
ilh1556ab_16
Ambient Temperature (°C)
Fig. 14 - Insertion Loss vs. Frequency
Fig. 17 - Switch Breakdown Voltage vs. Temperature
120
100
2.5
Switch Offset Voltage (mV)
V
P
= 10 V
R
L
= 50
Ω
2.0
1.5
1.0
0.5
0.0
I
F
= 5 mA
Isolation (dB)
80
60
40
20
0
10
3
10
4
10
5
10
6
25
ilh1556ab_17
35
45
55
65
75
85
ilh1546at_14
Frequency (Hz)
Fig. 15 - Output Isolation
Temperature (°C)
Fig. 18 - Switch Offset Voltage vs. Temperature
Rev. 1.8, 10-Mar-14
Document Number: 83842
5
For technical questions, contact:
optocoupleranswers@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT
www.vishay.com/doc?91000
测试/测量
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
