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IL410 Datasheet(PDF) 7 Page - Vishay Siliconix |
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IL410 Datasheet(HTML) 7 Page - Vishay Siliconix |
7 / 10 page 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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Similar Description - IL410 |
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