LH1550AT1/AAB1/AAB1TR
1 Form A
High-Voltage Solid State Relay
FEATURES
• Current Limit Protection
• l/O Isolation, 3000
V
RMS
• Typical
R
ON
20
Ω
• Load Voltage 350 V
• Load Current 120 mA
• High Surge Capability
• Linear, AC/DC Operation
• Clean Bounce Free Switching
• Low Power Consumption
• High Reliability Monolithic Receptor
• SMD Lead Available on Tape and Reel
• Equivalent to CPC1035N
• UL 52744 Recognition
• BABT/BSI Certified
APPLICATIONS
• General Telecom Switching
– On/off Hook Control
– Ring Delay
– Dial Pulse
– Ground Start
– Ground Fault Protection
• Instrumentation
• Industrial Controls
DESCRIPTION
The LH1550 is robust, ideal for telecom and ground
fault applications. It is a SPST normally open switch
(1 Form A) that replaces electromechanical relays in
many applications. It is similar to the LH1540, but has a
characteristically higher On resistance. It is con-
structed 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, it
employs current-limiting circuitry which meets FCC
68.302 and other regulatory voltage surge require-
ments when overvoltage protection is provided.
Dimensions in inches (mm)
3
.256 (6.50)
.248 (6.30)
4
5
6
.300 (7.62)
typ.
.150 (3.81)
.130 (3.30)
18° typ.
.020 (.051) min.
.035 (0.90)
.031 (0.80)
.100 (2.54) typ.
.014 (0.35)
.010 (0.25)
.347 (8.82)
.300 (7.62)
.150 (3.81)
.110 (2.79)
2
1
Pin one ID
A
K
1
6
–out
B
+out
2
5
3
4
.039
(1.00)
min.
4°
typ.
.022 (0.55)
.018 (0.45)
.343 (8.70)
.335 (8.50)
Part Number
LH1550AT1
LH1550AAB1
LH1550AAB1TR
Description
6-pin DIP, Thru Hole
6-pin SMD
6-pin SMD, Tape and Reel
Document Number: 83841
Revision 17-August-01
www.vishay.com
3–188
Recommended Operating Conditions
100
80
Load Current (mA)
60
40
20
0
–40
I
Fon
= 2.0 mA
I
Fon
= 3.0 mA
I
Fon
=
4.5 to 20 mA
Absolute Maximum Ratings
T
A
=25
°
C
Ambient Temperature Range (
T
A
) .................................... –40 to +85
°
C
Storage Temperature Range (
T
stg
) ................................. –40 to +150
°
C
Pin Soldering Temperature (t=10 s max) (
T
S
) ............................. 260
°
C
Input/Output Isolation Voltage
(
V
RMS
t=1.0 s,
I
ISO
=10
µ
A max) (
V
ISO
) .............................. 3750
V
RMS
LED Continuous Forward Current (
I
F
) .........................................50 mA
LED Reverse Voltage (
I
R
≤
10
µ
A) (
V
R
)........................................... 8.0 V
DC or Peak AC Load Voltage (
I
L
≤
50
µ
A) (
V
L
) .............................. 350 V
Continuous DC Load Current (
I
L
)
Bidirectional Operation............................................................100 mA
Unidirectional Operation............................................................ — mA
Peak Load Current (t=100 ms) (single shot) (
I
P
) ................................ †
Output Power Dissipation (continuous) (
P
DISS
)........................ 550 mW
† Refer to Current Limit Performance Application Note 58 for a discussion on
relay operation during transient currents.
Note:
Stresses in excess of the absolute Maximum Ratings can cause permanent
damage to the device. These are absolute stress ratings only. Functional oper-
ation 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.
–20
0
20
40
60
80
Ambient Temperature (°C)
Electrical Characteristics,
T
A
=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.
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
R
OFF
I
LMT
I
O
R
ON
—
—
0.5
170
—
—
Output Capacitance, Pin 4 to 6
C
O
—
—
Switch Offset
Transfer
Input/Output Capacitance
Turn-on Time
Turn-off Time
C
ISO
t
on
t
off
—
—
—
0.67
1.14
0.71
—
3.0
3.0
pF
ms
ms
V
ISO
=1.0 V
I
F
=5.0 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=50 mA
V
OS
—
28
7.0
300
210
0.35
0.096
18
6.7
0.3
35
10.0
—
250
200
1.0
—
—
—
Ω
Ω
G
Ω
mA
nA
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, t=5.0 ms
V
L
=6.0 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
I
F
=5.0 mA
I
Fon
I
Foff
V
F
—
0.2
1.15
1.1
1.0
1.26
2.0
—
1.45
mA
mA
V
I
L
=100 mA, t=10 ms
V
L
±350 V
I
F
=10 mA
Symbol
Min.
Typ.
Max.
Units
Test Conditions
µ
A
pF
pF
µV
Document Number: 83841
Revision 17-August-01
www.vishay.com
3–189
Figure 1. LED Voltage vs. Temperature
1.6
1.5
1.4
1.3
1.2
1.1
I
F
= 1 mA
I
F
= 2 mA
I
F
= 5 mA
I
F
= 10 mA
–20
0
20
40
60
AMBIENT TEMPERATURE, T
A
(°C)
80
I
F
= 20 mA
Figure 4. LED Current for Switch Turn-on/off vs.
Temperature
LED FORWAD CURRENT FOR SWITCH
TURN-0N/OFF (%) NORMALIZED TO 25
°C
300
I
F
= 50 mA
200
LED FORWAD VOLTAGE (V)
I
F
= 50 mA
100
0
1.0
–40
–100
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE, T
A
(°C)
Figure 2. Current Limit vs. Temperature
40
CHANGE IN CURRENT LIMIT (%)
NORMALIZED TO 25
°C
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
I
F
= 5 mA, t = 5 ms
Figure 5. ON-resistance vs. Temperature
60
CHANGE IN ON-RESISTANCE (%)
NORMALIZED TO 25
°C
50
I
L
= 5 mA
40
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE, T
A
(°C)
AMBIENT TEMPERATURE, T
A
(°C)
Figure 3. Turn-on Time vs. Temperature
70
60
CHANGE IN TURN-ON TIME (%)
NORMALIZED TO 25
°C
50
40
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
I
F
= 5 mA
I
F
= 50 mA
Figure 6. Turn-off Time vs. Temperature
80
75
CHANGE IN TURN-OFF TIME (%)
NORMALIZED TO 25
∞C
I
F
= 5 MA
I
L
= 50 MA
50
25
0
–25
–50
–40
–20
0
20
40
60
80
AMBIENT TEMPERATURE, T
A
(°C)
AMBIENT TEMPERATURE, T
A
(°C)
Document Number: 83841
Revision 17-August-01
www.vishay.com
3–190
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