LH1056
HIGH VOLTAGE, SOLID STATE RELAY
OPTOCOUPLER
FEATURES
• Normally Open, Single Pole Single Throw
Operation
• Control 350 VAC or DC Voltage
• Switch 100 mA Loads
• LED Control Current, 1.5 mA
• Low ON-Resistance
• dv/dt, >500 V/ms
• Isolation Test Voltage, 3750 VAC
RMS
• Current Limiting
• Underwriters Lab File # E52744
APPLICATIONS
• Telephone Switch Hook
• High Voltage Test Equipment
• TRIAC Driver
• Motor Control
• Industrial Control Systems
DESCRIPTION
The LH1056 is a single pole single throw (SPST), nor-
mally open (NO), solid state relay. The relay can control
AC or DC loads currents up to 100 mA, with a supply
voltage up to 350 V. The device is packaged in a six pin
0.3 inch dual-in line package. This package offers an
insulation dielectric withstand of 7500 VAC
PK
.
The coupler consists of a AlGaAs LED that is optically
coupled to a dielectrically isolated photodiode array
which drives two series connected high voltage MOS
transistors. The typical ON-Resistance is 30
Ω
at 25 mA
and is linear up to 50 mA. The incremental resistance
drops to less than 20
Ω
beyond 50 mA while reducing
internal power dissipation at high load currents. There is
built-in current limiting circuitry in the detector chip.
Package Dimensions in Inches (mm)
Pin One ID.
2
1
3
A
1
2
6
5
S
NC
.248 (6.30)
.256 (6.50)
4
5
6
K
3
4
.335 (8.50)
.343 (8.70)
.039
(1.00)
Min.
4°
Typ.
.018 (0.45)
.022 (0.55)
NC
S'
.300 (7.62)
Typ.
.130 (3.30)
.150 (3.81)
18° Typ.
.020 (.051) Min.
.031 (0.80)
.035 (0.90)
.100 (2.54) Typ.
.010 (.25)
.014 (.35)
.300 (7.62)
.347 (8.82)
.110 (2.79)
.150 (3.81)
Absolute Maximum Ratings
(T
A
=25
°
C)
Emitter
Reverse Voltage.............................................................................6.0 V
Continuous Forward Current....................................................... 60 mA
Peak Forward Current (1
µ
s)............................................................ 1 A
Power Dissipation .....................................................................100 mW
Derate Linearly from 25
°
C ................................................... 1.3 mW/
°
C
Detector
Output Breakdown Voltage........................................................
±
350 V
Continuous Load Current........................................................
±
100 mA
Total Power Dissipation.............................................................500 mW
Derate Linearly from 25
°
C ................................................ See Figure 7
Package
Isolation Test Voltage ...................................................... 3750 VAC
RMS
Isolation Resistance
V
IO
=500 V, T
A
=25
°
C ..............................................................
≥
10
12
Ω
V
IO
=500 V, T
A
=100
°
C .............................................................
≥
10
11
Ω
Power Dissipation .....................................................................500 mW
Derate Linearly from 25
°
C ................................................... 2.5 mW/
°
C
Storage Temperature Range.......................................... –40 to +150
°
C
Operating Temperature Range ........................................ –40 to +85
°
C
Junction Temperature ..................................................................100
°
C
Soldering Temperature, 2 mm from case, 10 sec........................260
°
C
5–198
Characteristics
(T
A
=25
°
C)
Description
Emitter
Forward Voltage
V
F
Temperature Coefficient
Reverse Current
Junction Capacitance
Dynamic Resistance
Switching Time
Detector
Output Breakdown Voltage
Output Off-State Leakage Current
Feed through Capacitance, pins 4 to 6
Current Limit
Package
LED Forward Current for Turn-on
LED Forward Current for Turn-off
ON Resistance
Turn-on Time
Turn-off Time
I
FON
I
FOFF
R
ON
t
ON
t
OFF
0.2
20
30
0.9
0.7
2.5
3.5
1.3
50
2.0
2.0
mA
mA
W
ms
ms
V
L
=
±
7 V, I
L
=100 mA,
t=10 ms
V
L
=
±
300 V, I
F
=<5
µ
A
I
T
=
±
25 mA, I
F
=5 mA
I
F
=10 mA, V
L
=+50 V
R
L
=1 k
Ω
V
B
I
T(OFF)
C
T
I
LMT
100
350
380
.03
24
150
210
200
V
nA
pF
mA
I
B
=50
µ
A
V
T
=100 V, I
F
=0 mA
I
F
=0, f=1 KHz,
V
L
=4 VP-P
I
F
=5 mA, V
L
=
±
7 V,
t=10 ms
V
F
∆
V
F
/
∆
T
I
R
C
J
∆
V
F
/
∆
I
F
t
R
, t
F
1.25
–2.2
1
15
6
1
10
1.5
V
mV/
°
C
µ
A
Symbol
Min.
Typ.
Max.
Unit
Test Condition
I
F
=10 mA
V
R
=6 V
V
F
=0 V, f=1 MHz
I
F
=10 mA
I
F
=10 mA
pF
W
µ
s
Figure 1. Timing test circuit
IL
1
I
F
2
NC
3
5
4
NC
6
1 kΩ
Figure 3. Timing waveform
t
R
≤1 µs
Control
Input
I
F
t
R
≤1 µs
I
L
90%
10%
t
OFF
+
–
50 V
Switch
Output
t
ON
Figure 2. LED forward current vs. forward voltage
forward voltage
IF - Forward Current - mA
100
Figure 4. Terminal current vs. terminal voltage
terminal voltage
150
It - Terminal Current - mA
Ta = 25°C
Ta = 25°C
10
100
50
0
-50
-100
-150
-5
-4 -3 -2 -1 0 1 2 3
Vt - Terminal Voltage - V
4
5
Ta = 70°C
1
.1
1.0
1.1
1.2
1.3
1.4
VF - Forward Voltage - V
5–199
LH1056
IFth LED current in mA
Figure 5. Turn on current vs. temperature
6
5
Figure 9.
∆
Ron vs. temperature
60
40
∆R
on in %
20
0
-20
-40
-40
-20
0
20
40
60
Ambient Temperature in
°C
80
IF=6 mA
IL=25mA
4
3
2
1
0
0
20
40
60
Ambient temperature in
°C
80
Figure 6. Load current vs. temperature
200
Load Current in mA
150
4.5 mA
100
3.5 mA
50
0
-40
IF=2.5 mA
>6 mA
Figure 10.
∆
Toff vs. temperature
100
∆T
off in %
50
0
Normalized @ IF=6 mA
IL=37.5 mA,Ta=25°C
-50
-100
-40
80
-20
0
20
40
60
Ambient temperature in
°C
-20
0
20
40
60
Ambient temperature in
°C
80
Figure 7. Derating of ILoad vs. temperature
110
Percent of rated
load Current
100
90
80
70
60
-40
-20
0
20
40
60
Ambient temperature in
°C
80
recommended
IF=6 mA
Absolute
Figure 11. Change in Ton vs. temperature
300
Normalized @IF=6 mA
250 IL=37.5 mA, Ta=25°C
∆T
on in %
200
150
100
50
0
-50
-40
-20
0
20
40
60
80
IF=6 mA
IF=2.5 mA
Ambient Temperature in
°C
Figure 12. Turn-on and turn-off time vs. LED current
6
Turn-on Time in ms
5
4
3
2
1
0
0
Toff
5
10
15
IF-LED Current in mA
20
Ton
Figure 8. Change in I
limit
vs. temperature
40
∆I
limit in %
20
0
-20
-40
-40
Normalized @ 25°C
IF=6 mA
t=10ms
-20
0
20
40
60
Ambient Temperature in
°C
80
5–200
LH1056
