Siemens LH1550 Datasheet

LH1550

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, 2.5 mA

• Low ON-Resistance, 37 Ω Typ. at 100 mA

• Isolation T est V oltage, 3750 VA C

RMS

• Current Limit Protection

• Underwriters Lab File # E52744
APPLICATIONS

• Telephone Switch Hook

• High V oltage T est Equipment

• TRIAC Driver

• Motor Control

• Industrial Control Systems

DESCRIPTION

The LH1550 is a single pole single throw (SPST), normally
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 dual­in line package. This package offers an insulation dielec­tric withstand of 3750 V

RMS

.

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 37 Ω

at 25 mA and is linear
up to 50 mA. There is built-in current limiting circuitry in the
detector chip, enabling it to pass FCC 68-302 and other
regulatory voltage surge requirements when over voltage
protection is provided.

Package Dimensions in Inches (mm)

Pin One ID.

12

5

6

.100 (2.54) Typ.

.130 (3.30)
.150 (3.81)

.020 (.051) Min.

.031 (0.80)
.035 (0.90)

NC

A

K

1

2

3

.300 (7.62)

.300 (7.62)
.347 (8.82)

Typ.

18° Typ.

.010 (.25)
.014 (.35)

6

S

5

NC

4

S'

.110 (2.79)
.150 (3.81)

.248 (6.30)
.256 (6.50)

.039

(1.00)

Min.

4°

Typ.

.018 (0.45)
.022 (0.55)

3

4

.335 (8.50)
.343 (8.70)

Absolute Maximum Ratings (T
Emitter

Reverse Voltage..................................................................5.0 V

Continuous Forward Current.............................................50 mA

Peak Forward Current (1 µ

Power Dissipation...........................................................100 mW

Derate Linearly from 25 °

C..........................................1.3 mW/ ° C

Detector

Output Breakdown Voltage.................................................350 V

Continous Load Current..................................................100 mA

Total Power Dissipation ..................................................300 mW

Derate Linearly from 25 °

C.......................................See Figure 4

Package

Isolation Test Voltage.............................................3750 VAC

Power Dissipation...........................................................400 mW

Derate Linearly from 25 °

C..........................................2.5 mW/ ° C

Isolation Resistance

V

=500 V, T

IO

V

=500 V, T

IO

=25 ° C.................................................... ≥ 10

A

=100 ° C................................................... ≥ 10

A

Storage Temperature Range................................–40 to +150 ° C

Operating Temperature Range...............................–40 to +85 °

Junction Temperature........................................................100 °

Soldering Temperature, 2 mm from case, 10 sec.............260 °

=25 ° C)

A

s) ..................................................1 A

RMS

12

Ω

11

Ω

C
C
C

5–208

Characteristics (T

=25 ° C)

A

Description Symbol Min. Typ. Max. Unit Test Condition
Emitter

Forward Voltage V
Reverse Current I
Junction Capacitance C
Dynamic Resistance
Switching Time t

R

∆ V

R

F

J

/ ∆ I

F

, t

F

0.9 1.25 1.4 V I
110
15 pF V

F

6WI
1

=5 mA

F

AV

µ

µ

sI

=5 V

R

=0 V, f=1 MHz

F

=10 mA

F

=10 mA

F

Detector

Output Breakdown Voltage V
Output Off-State Leakage Current I
Feed through Capacitance, pins 4 to 6 C

Current Limit I

B

T(OFF)

T

LMT

350 380 V I

.03 1.0

µ AV

TBD I

150 190 270 mA I

=50 µ A

B

=

±

100 V, I

T

=0, f=1 KHz,

F

V

=4 VP-P

L

=5 mA, t=5 ms

F

Package

LED Forward Current for Turn-on I
LED Forward Current for Turn-off I
ON-resistance R
Turn-on Time t
Turn-off Time t

FON
FOFF

ON
ON
OFF

0.2 mA V

25 37 50 W I

0.8 3.0 ms I

0.04 3.0 ms

2.5 mA I

=100 mA, t=10 ms

L

= ± 300 V, I

L

=5 mA, I

F

=5 mA, V

F

R

=1 k Ω

L

=0 mA

F

=<5 µ A

L

=100 mA

L

=+50 V

L

Figure 1. Timing test circuit

1

I

F

2

3

6

5

4NC

Figure 2. Timing waveform

Control

Input

Switch

Output

90%

t

ON

NC

I

I

L
1 kΩ

F

Figure 3. LED forward current vs. forward voltage

120
100

85°C

80

+

50 V

–

60
40

25°C

20

0

1.81.61.41.21.00.80.6

IF Forward current in mA

tR≤1 µstR≤1 µs

Figure 4. Recommended load current vs. temperature

VF- Input LED forward Voltage

100

I

L

10%

t

OFF

80
60

IF=1.5 mA

40
20

0

IL-Load Current in mA

>4.5 mA

3.75 mA

806040200-20-40

Ambient temperature in °C

5–209

LH1550