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IL410 Datasheet(PDF) 7 Page - Vishay Siliconix

Part # IL410
Description  Optocoupler, Phototriac Output, Zero Crossing, High dV/dt, Low Input Current
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Manufacturer  VISHAY [Vishay Siliconix]
Direct Link  http://www.vishay.com
Logo VISHAY - Vishay Siliconix

IL410 Datasheet(HTML) 7 Page - Vishay Siliconix

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Document Number: 83627
For technical questions, contact: optocoupler.answers@vishay.com
www.vishay.com
Rev. 1.6, 09-Jan-08
7
IL410/IL4108
Optocoupler, Phototriac Output, Zero
Crossing,
High dV/dt, Low Input Current
Vishay Semiconductors
Fig. 15 - 3 - Connect a Choke of Low Winding Cap. in Series, e.g., a
Ringcore Choke, with Higher Load Currents
Note
Measures 2 to 3 are especially required for the load separated from
the IL410/IL4108 during operation. The above mentioned effects do
not occur with IL410/IL4108 circuits which are connected to the line
by transformers and which are not mechanically interrupted.
In such cases as well as in applications with a resistive load the
corresponding protective circuits can be neglected.
CONTROL AND TURN-ON BEHAVIOR
The trigger current of the IL410/IL4108 has a positive
temperature gradient. The time which expires from applying
the control current to the turn-on of the load current is defined
as the trigger delay time (tgd). On the whole this is a function
of the overdrive meaning the ratio of the applied control
current versus the trigger current (IF/IFT). If the value of the
control current corresponds to that of the individual trigger
current of IL410/4108 turn-on delay times amounts to a few
milliseconds only. The shortest times of 5.0 to 10 ms can be
achieved for an overdrive greater or equal than 10. The
trigger delay time rises with an increase in temperature.
For very short control current pulses (tpIF < 500 µs) a
correspondingly higher control current must be used. Only
the IL410/IL4108 without zero voltage switch is suitable for
this operating mode.
ZERO VOLTAGE SWITCH
The IL410/IL4108 with zero voltage switch can only be
triggered during the zero crossing the sine AC voltage. This
prevents current spikes, e.g. when turning-on cold lamps or
capacitive loads.
APPLICATIONS
Direct switching operation: The IL410/IL4108 switch is
mainly suited to control synchronous motors, valves, relays
and solenoids in Grätz circuits. Due to the low latching
current (500 µA) and the lack of an RC circuit at the output,
very low load currents can easily be switched.
Indirect switching operation: The IL410/IL4108 switch acts
here as a driver and thus enables the driving of thyristors and
triacs of higher performance by microprocessors. The driving
current pulse should not exceed the maximum permissible
surge current of the IL410/IL4108. For this reason, the
IL410/IL4108 without zero voltage switch often requires
current limiting by a series resistor.
The favorably low latching current in this operating mode
results in AC current switches which can handle load
currents from some milliamperes up to high currents.
APPLICATION NOTE
Over voltage protection: A voltage-limiting varistor (e.g.
SIO
VS05K250)
which
directly
connected
to
the
IL410/IL4108
can
protect
the
component
against
overvoltage.
iil410_15
22 nF
220 V~
1
2
3
5
4
6
500 µH


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