IL410 データシートの表示（PDF） - Siemens AG
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IL410 Datasheet PDF : 6 Pages
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Technical Information
Commutating Behavior
The use of a triac at the output creates difficulties in com-
mutation due to both the built-in coupled thyristor systems.
The triac can remain conducting by parasitic triggering after
turning off the control current. However, if the IL410 is
equipped with two separate thyristor chips featuring high dv/
dt strength, no RC circuit is needed in case of commutation.
Control And Turn-On Behavior
The trigger current of the IL410 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 trig-
ger delay time (tgd). On the whole this is a function of the
overdrive meaning the ratio of the applied control current ver-
sus the trigger current (IF/IFT). If the value of the control cur-
rent corresponds to that of the individual trigger current of
IL410 turn-on delay times amounts to a few milliseconds only.
The shortest times of 5 to 10 µs can be achieved for an over-
drive greater or equal than 10. The trigger delay time rises
with an increase in temperature.
For very short control current pulses (tplF <500 µs) a corre-
spondingly higher control current must be used. Only the
IL410 without zero voltage switch is suitable for this operating
mode.
Zero Voltage Switch
The IL410 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 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 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 cur-
rent of the IL410. For this reason, the IL410 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
can protect the component against overvoltage.
IL410
5–6
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