LH1525AT/AAB/AABTR
1 Form A
Solid-State Relays
FEATURES
• Extremely Low Operating Current
• High-speed Operation
• 5300 V
RMS
I/O Isolation
• Current-limit Protection
• High Surge Capability
• Linear, ac/dc Operation
• dc-only Option
• Clean, Bounce-free Switching
• Low Power Consumption
• High-reliability Monolithic Receptor
• Surface-mountable
•
Flammability; UL94,VØ
AGENCY APPROVALS
• UL – File No. E52744
• BSI/BABT Cert. No. 7980
• CSA – Certification 093751
• FIMKO Approval
APPLICATIONS
• General Telecom Switching
– Telephone Line Interface
– On/off Hook
– Ring Relay
– Break Switch
– Ground Start
• Battery-powered Switch Applications
• Industrial Controls
– Microprocessor Control of Solenoids,
Lights, Motors, Heaters, etc.
• Programmable Controllers
• Instrumentation
• See Application Note 56
DESCRIPTION
The LH1525 relay as SPST normally open switches
(1 Form A) that can replace electromechanical relays in
many applications. The relay require a minimal amount of
LED drive current to operate, making it ideal for battery-
powered and power consumption sensitive applications.
The relay is constructed using a GaAIAs LED for actua-
tion control and an integrated monolithic die for the
switch output. The die, fabricated in a high-voltage
dielectrically isolated technology, comprised of a photo-
diode array, switch-control circuitry, and MOSFET
switches. In addition, the relay employs current-limiting
circuitry, enabling it to pass FCC 68.302 and other regu-
latory surge requirements when overvoltage protection is
provided. The relay can be configured for ac/dc or dc-
Package Dimensions in Inches (mm)
DIP
Pin One ID.
3
.256 (6.50)
.248 (6.30)
4
5
6
2
1
S
6
DC
5
S'
4
S
S'
1
2
3
.343 (8.70)
.335 (8.50)
.039
(1.00)
Min.
4° Typ.
.020 (.051) Min.
.022 (0.55)
.018 (0.45)
.035 (0.90)
.031 (0.80)
.100 (2.54) Typ.
.300 (7.62)
Typ.
.150 (3.81)
.130 (3.30)
18° Typ.
.014 (.35)
.010 (.25)
.347 (8.82)
.300 (7.62)
.150 (3.81)
.110 (2.79)
SMD
.343 (8.71)
.335 (8.51)
Pin one I.D.
.256 (6.50)
.248 (6.30)
.050 (1.27) typ.
.052 (1.33)
.048 (1.22)
.150 (3.81)
.130 (3.30)
.0098 (.25)
.0040 (.10)
.040 (1.016)
.020 (0.508)
.395 (10.03)
.375 (9.63)
.300 (7.62)
typ.
.039
(0.99)
min.
3° to 7°
18°
.012 (0.31)
.008 (0.20)
4°
.100 (2.54)
.315 (8.00)
min.
only operation.
Part Identification
Part Number
LH1525AT
LH1525AAB
LH1525AABTR
Description
6-pin DIP, Tubes
6-pin SMD, Tubes
6-pin SMD, Tape and Reel
2001 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
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March 21, 2001-14
Recommended Operating Conditions
120
100
LOAD CURRENT (mA)
80
60
40
20
I
F
= 0.3 mA
I
F
= 1.0 mA
I
F
= 1.5 mA
I
F
= 2.0 mA
I
F
= 2.25 mA
TO 20 mA
–20
0
20
40
60
80
Absolute Maximum Ratings,
T
A
=25
°
C (except where noted)
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.
0
–40
AMBIENT TEMPERATURE, T
A
(°C)
Ambient Operating 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, t=1.0 s,
V
ISO
....................... 5300 V
RMS
LED Input Ratings:
Continuous Forward Current,
I
F
..............................................50 mA
Reverse Voltage,
V
R
.................................................................. 8.0 V
Output Operation (each channel)
dc or Peak ac Load Voltage,
I
L
≤
50
µ
A,
V
L
................................ 400 V
Continuous dc Load Current,
I
L
Bidirectional Operation
Pin 4 to 6 ..............................................................................125 mA
Unidirectional Operation
Pins 4, 6 (+) to Pin 5 (–) .........................................................250 mA
Power Dissipation,
P
DISS
.........................................................550 mW
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 purposes only and are not part of the testing requirements.
Parameter
Input
LED Forward Current for Switch Turn-on
LED Forward Current for Switch Turn-off
LED Forward Voltage
Output
ON-resistance:
ac/dc, each pole
dc Pins 4, 6 (+) to 5 (–)
OFF-resistance
Current Limit
Output Off-state Leakage Current
Output Capacitance
Switch Offset
Transfer
Input/Output Capacitance
Turn-on Time
Turn-off Time
Symbol
Min.
Typ.
Max.
Unit
Test Condition
I
F
on
I
F
off
V
F
R
ON
—
0.01
0.80
0.33
0.23
1.16
0.5
—
1.40
mA
mA
V
I
L
=100 mA, t=10 ms
V
L
=±350 V, t=100 ms
I
F
=1.5 mA
17
4.25
—
170
—
—
—
—
—
26
7.0
2000
185
0.67
0.096
22
6.42
0.2
36
8.25
—
270
200
1.0
—
—
—
Ω
Ω
G
Ω
mA
nA
µ
A
pF
pF
µ
V
I
F
=1.5 mA,
I
L
=±50 mA
I
F
=1.5 mA,
I
L
=100 mA
I
F
=0 mA,
V
L
=±100 V
I
F
=1.5 mA, t=5.0 ms
V
L
=7.0 V
I
F
=0 mA,
V
L
=±100 V
I
F
=0 mA,
V
L
=±400 V
I
F
=0 mA,
V
L
=1.0 V
I
F
=0 mA,
V
L
=50 V
I
F
=5.0 mA
V
ISO
=1.0 V
I
F
=1.5 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=50 mA
I
F
=1.5 mA,
I
L
=50 mA
I
F
=5.0 mA,
I
L
=50 mA
R
OFF
I
LMT
I
O
C
O
V
OS
C
ISO
t
on
t
off
—
—
—
—
—
0.75
1.25
0.22
0.6
0.63
—
—
1.0
—
0.9
pF
ms
ms
ms
ms
2001 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
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LH1525AT/AAB/AABTR
March 21, 2001-14
Typical Performance Characteristics
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
LED Current for switch Turn-On
(%), norm. to 25°C
Figure 4. LED Current for Switch Turn-on/off vs.
Temperature
400
LED FORWAD VOLTAGE (V)
I
F
= 50 mA
300
I
L
=100 mA
200
100
0
1.0
–40
-100
-40
-20
0
20
40
60
80
Temperature (°C)
Figure 2. LED Forward Current vs. LED Forward Voltage
120
100
T=8°C
T=25°C
T=-40°C
Figure 5. ON-Resistance vs. Temperature
40
30
Change in Ron (%), norm. to
25°C
20
10
0
-10
-20
-30
-40
-40
I
L
=5mA
I
L
=50mA
LED Forward Current (mA)
80
60
40
20
0
0
0.5
1
1.5
LED Forward Voltage (V)
2
-20
0
20
40
Temperature (°C)
60
80
Figure 3. LED Reverse Current vs. LED Reverse Voltage
Figure 6. LED Dropout Voltage vs. Temperature
1.21
10
LED Reverse Current (uA)
LED Dropout Voltage (V)
1.17
I
L
=100mA
8
6
4
2
0
0
20
85°C
25°C
-40°C
1.13
1.09
1.05
40
60
LED Reverse Voltage (V)
80
1.01
-40
-20
0
20
40
60
80
Temperature (°C)
2001 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
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LH1525AT/AAB/AABTR
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Figure 7. Load Current vs. Load Voltage
300
250
Load Current (mA)
200
150
100
50
I
F
=1.5m
0
0
1
2
3
4
5
Load Voltage (V)
6
7
-40°C
25°C
85°C
Figure 10. Switch Capacitance vs. Applied Voltage
50
40
Capacitance (pF)
I
F
=0mA
30
20
10
0
0
10
20
30
40
50
60
70
80
90 100
Applied Voltage (V)
Figure 8. Current Limit vs. Temperature
40
I
F
= 5 mA, t = 5 ms
CHANGE IN CURRENT LIMIT (%)
NORMALIZED TO 25
°C
30
20
10
0
–10
–20
–30
–40
–40
–20
0
20
40
60
80
Figure 11. Output Isolation
120
100
Isolation (dB)
80
60
40
R
L
=50 W
V
P
=10V
20
0
100
1000
10000
100000
1000000
AMBIENT TEMPERATURE, T
A
(°C)
Frequency (Hz)
Figure 9. Variation in ON-Resistance vs. LED Current
9
8
Figure 12. Leakage Current vs. Applied Voltage at Elevated
Temperatures
300
85°C
250
Leakage Current (nA)
200
150
70°C
50°C
25°C
ac/dc ON-RESISTANCE VARIATION (%)
NORMALIZED TO DATA SHEET
R
ON
SPECIFICATION @ I
F
= 5 mA
7
6
5
4
3
2
1
0
0.0
1.0
2.0
3.0
4.0
5.0
100
50
0
0
100
200
300
400
Load Voltage (V)
LED FORWARD CURRENT (mA)
2001 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
3–110
LH1525AT/AAB/AABTR
March 21, 2001-14
Figure 13. Insertion Loss vs. Frequency
0.4
0.35
Figure 16. Switch Offset Voltage vs. Temperature
5
I
F
= 5 mA
Switch Offset Voltage (µV)
4
0.3
Insertion Loss (dB)
0.25
0.2
0.15
0.1
0.05
0
100
R
L
=600
Ω
I
F
=5 mA
3
2
1
0
1000
10000
100000
Frequency (Hz)
1000000
20
30
40
50
60
70
80
90
Ambient Temperature, T
A
(°C)
Figure 14. Switch Breakdown Voltage vs. Load Current
60
Figure 17. LED Offset Voltage vs. LED Current
0.6
0.5
0.4
0.3
0.2
0.1
0.0
40
85°C
30
25°C
-40°C
20
10
0
0
100
200
300
400
500
Switch Breakdown Voltage (V)
I
F
=0mA
I
L
=<50uA
Switch Offset Voltage (µV)
50
Load Current (uA)
0
5
10
15
20
25
LED Forward Current (mA)
Figure 15. Switch Breakdown Voltage vs. Temperature
CHANGE IN BREAKDOWN VOLTAGE (%)
NORMALIZED TO 25
°C
8
6
Figure 18. Turn-On Time vs. LED Current
2.0
85°C
0.16
25°C
-40°C
0.12
4
2
0
–2
–4
–6
–8
–40
Turn On Time (ms)
0.8
0.4
I
L
=50 mA
–20
0
20
40
60
80
0.0
0
4
8
12
16
LED Forward Current (mA)
20
AMBIENT TEMPERATURE, T
A
(°C)
2001 Infineon Technologies Corp. • Optoelectronics Division • San Jose, CA
www.infineon.com/opto • 1-888-Infineon (1-888-463-4636)
3–111
LH1525AT/AAB/AABTR
March 21, 2001-14
