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LH1540
HIGH VOLTAGE, SOLID STATE RELAY OPTOCOUPLER
FEATURES * Normally Open, Single Pole Single Throw Operation * Control 350 VAC or DC Voltage * Switch 150 mA Loads * LED Control Current, 1 mA, Typical * Low ON-Resistance, 20 Typ. at 50 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 LH1540 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 dual-in line package. This package offers an insulation dielectric withstand of 3750 VACRMS. 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 20 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................................................................... 6.0 V Continuous Forward Current .............................................60 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 ..................................................150 mA Total Power Dissipation................................................... 400 mW Derate Linearly from 25C .......................................See Figure 3 Package Isolation Test Voltage .............................................3750 VACRMS Isolation Resistance VIO=500 V, TA=25C.................................................... 1012 VIO=500 V, TA=100C.................................................. 1011 Power Dissipation ........................................................... 500 mW Derate Linearly from 25C .......................................... 2.5 mW/C Storage Temperature Range ................................ -40 to +150C Operating Temperature Range............................... -40 to +85C Junction Temperature ........................................................ 100C Soldering Temperature, 2 mm from case, 10 sec. ............ 260C
5-205
Characteristics (TA=25C)
Description Emitter Forward Voltage VF 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 IFTh IFOFF RON tON tOFF 12 1 0.2 20 1.2 0.5 2 0.9 25 2.0 2.0 mA mA W ms ms IL=100 mA, t=10 ms VL= 300 V, IL=<5 A IF=5 mA, IL=50 mA IF=5 mA, VL=+50 V RL=1 k VB IT(OFF) CT ILMT 170 350 .02 55 210 250 200 V nA pF mA IB=50 A VT= 100 V, IF=0 mA IF=0, f=1 KHz, VL=1 VP-P IF=5 mA, t=5 ms VF VF/T IR CJ VF/IF tR, tF 1.25 -2.2 1 15 6 1 10 1.5 V mV/C
A
Symbol
Min.
Typ.
Max.
Unit
Test Condition
IF=10 mA
VR=6 V VF=0 V, f=1 MHz IF=10 mA IF=10 mA
pF W
s
IF Forward current in mA
100 80 60 40 20 0 0.6
85C 25C
IL-Load Current in mA
Figure 1. LED forward current vs. forward voltage 120
Figure 3. Recommended load current vs. temp. 120 >5 100 80 60 40 20 0 -40 -20 0 20 40 60 80 IF=2 ma 3 4
0.8 1.0 1.2 1.4 1.6 1.8 VF- Input LED forward Voltage
Ambient Temperature in C Figure 2. Forward current vs. forward voltage
+Iss' (mA) 210 -1.0 50 -50 ILmt -210 -Iss' (mA) 1.0 Vss' (v) ILmt
-Vss' (v)
Figure 4. Current limit vs. temperature 40 IF=5 mA 30 t=5 ms 20 Vl=see Elec.Char 10 0 -10 -20 -30 -40 -40 -20 0 20 40 60 80 ILmt in % Ambient Temperature in C
5-206
LH1540
IFT min %
Toff in ms
Figure 5. Minimum IRT required vs. temp. 100 80 IL=100 mA 60 Normalized by IFT @ 25C 40 20 0 -20 -40 -60 -40
Figure 9. tOFF vs. LED current and temperature 0.9 -40 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0 4 8 12 16 IF-LED Current in mA 20 25C 85 IL=50 mA
-20 0 20 40 60 80 Ambient Temperature in C
Figure 6. Change in ON-resistance vs. temperature 40 IL=50 mA 30 Normalized by Ron 20 @ 25C 10 0 -10 -20 -30 -40 -40 -20 0 20 40 60 Ambient temperature in C
Figure 10. Change in tON vs. temperature 20 10 Ton in % 0 IF=5 mA IL=50 mA Normalized @ 25C -20 0 20 40 60 Ambient temperature in C 80
(R/R) in %
-10 -20 -40
80
Figure 7. Change in ON-resistance vs. LED current 1.5 (R/R) Ratio of ON-Resistance 1.0 0.5 0.0 -0.5 0 2 4 6 8 10 12 14 16 18 20 IF- LED Current in mA IL=50 mA Normalized by ON Resistance @ 25C
Figure 11. Change in tOFF vs. temperature 100 75 50 25 0 -25 -50 -75 -100 -40 IF=5 mA IL=50 mA
Toff in %
-20
0
20
40
60
80
Ambient Temperature in C Figure 12. Timing test circuit and timing waveform
IL 1 IF 2 NC 3 5 4 NC 6 1 k
Figure 8. Turn on time vs. LED current and temp. 10 IL=50 mA 8 - 40C Ton in ms 6 4 2 0 0 4 8 12 16 IF-LED Current in mA 20 25C 85C
+ -
50 V
tR1 s Control Input Switch Output 90%
IF IL
tR1 s
10% tOFF
tON
5-207
LH1540

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