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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 Typ. at 100 mA * Isolation Test Voltage, 3750 VACRMS * Current Limit Protection * Underwriters Lab File # E52744 APPLICATIONS * Telephone Switch Hook * High Voltage Test 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 VRMS. 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 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. 3 .248 (6.30) .256 (6.50) 4 5 6
NC
2
1
A K
1 2
6 5
S NC
3
4
.335 (8.50) .343 (8.70) .039 (1.00) Min. 4 Typ. .018 (0.45) .022 (0.55)
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 (TA=25C) Emitter Reverse Voltage .................................................................. 5.0 V Continuous Forward Current .............................................50 mA Peak Forward Current (1 s) ..................................................1 A Power Dissipation........................................................... 100 mW Derate Linearly from 25C .......................................... 1.3 mW/C Detector Output Breakdown Voltage................................................. 350 V Continous Load Current ..................................................100 mA Total Power Dissipation .................................................. 300 mW Derate Linearly from 25C .......................................See Figure 4 Package Isolation Test Voltage.............................................3750 VACRMS Power Dissipation........................................................... 400 mW Derate Linearly from 25C .......................................... 2.5 mW/C Isolation Resistance VIO=500 V, TA=25C.................................................... 1012 VIO=500 V, TA=100C................................................... 1011 Storage Temperature Range ................................ -40 to +150C Operating Temperature Range............................... -40 to +85C Junction Temperature ........................................................ 100C Soldering Temperature, 2 mm from case, 10 sec. ............ 260C
5-208
Characteristics (TA=25C)
Description Emitter Forward Voltage 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 IFON IFOFF RON tON tOFF 25 0.2 37 0.8 0.04 50 3.0 3.0 2.5 mA mA W ms ms IL=100 mA, t=10 ms VL= 300 V, IL=<5 A IF=5 mA, IL=100 mA IF=5 mA, VL=+50 V RL=1 k VB IT(OFF) CT ILMT 150 350 380 .03 TBD 190 270 mA 1.0 V A IB=50 A VT= 100 V, IF=0 mA IF=0, f=1 KHz, VL=4 VP-P IF=5 mA, t=5 ms VF IR CJ VF/IF tR, tF 0.9 1.25 1 15 6 1 1.4 10 V
A
Symbol
Min.
Typ.
Max.
Unit
Test Condition
IF=5 mA VR=5 V VF=0 V, f=1 MHz IF=10 mA IF=10 mA
pF W
s
Figure 1. Timing test circuit
IL 1 IF 2 NC 3 5 4 NC 6 1 k
Figure 3. LED forward current vs. forward voltage IF Forward current in mA 120 100 80 60 40 20 0 0.6 0.8 1.0 1.2 1.4 1.6 1.8 VF- Input LED forward Voltage 85C 25C
+ -
50 V
Figure 2. Timing waveform
tR1 s Control Input Switch Output 90% IF tR1 s IL 10% tOFF
Figure 4. Recommended load current vs. temperature IL-Load Current in mA 100 80 60 40 20 0 -40 3.75 mA >4.5 mA IF=1.5 mA
tON
-20 0 20 40 60 Ambient temperature in C
80
5-209
LH1550
Figure 5. Turn on current vs. temperature 300 Normalized by Ift required at Ta=25C IL=100 mA
Figure 8. Change in tOFF vs. temperature 80 60 Toff in /% 40 20 0 -20 -40 -40 IL=50 mA, IF=5 mA
Ift in /%
200 100 0 -100 -40
-20 0 20 40 60 Ambient Temperature in C
80
-20 0 20 40 60 80 Ambient Temperature in C
Figure 6. Change in current limit vs. temperature 40 Ilimit in % 20 0 -20 -40 -40 Normalized @ 25C IF=5 mA, t=5 ms
Figure 9. Change in tON vs. temperature 80 60 Ton in % 40 20 0 -20 -40 -40 IL=50 mA, IF=5 mA
-20
0
20
40
60
80
Ambient Temperature in C Figure 7. Change in ON resistance vs. temp. 60 Ron-Change in Resistance in % 40 20 0 -20 -40 -40 -20 0 20 40 60 Ambient Temperature in C 80 IL=100 mA
-20 0 20 40 60 Ambient temperature in C
80
5-210
LH1550

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