IL410/ IL4108
Vishay Semiconductors
1
6
2
V
DINHmin
=f(I
F
/I
FT
25°C),
parameter: T
j
Device zero voltage
switch can be triggered
only in hatched area
below Tj curves.
5
0.1
µF
220 V~
3
4
iil410_12
iil410_13
Figure 12. Typical Static Inhibit Voltage Limit
Figure 13. 1- Apply a Capacitor to the Supply Pins at the Load-Side
Technical Information
Commutating Behavior
The use of a triac at the output creates difficulties in
commutation due to both the built-in coupled thyristor
systems. The triac can remain conducting by parasitic
triggering after turning off the control current. How-
ever, if the IL410/4108 is equipped with two separate
thyristor chips featuring high dv/dt strength, no RC cir-
cuit is needed in case of commutation.
33
Ω
1
6
2
5
22 nF
220 V~
3
4
Current commutation:
The values 100 A/ms with following peak reverse
recovery current > 80 mA should not be exceeded.
iil410_14
Avoiding high-frequency turn-off current
oscillations:
This effect can occur when switching a circuit. Current
oscillations which appear essentially with inductive
loads of a higher winding capacity result in current
commutation and can generate a relatively high peak
reverse recovery current. The following alternating
protective measures are recommended for the indi-
vidual operating states:
Figure 14. 2 - Connect a Series Resistor to the Output and Bridge
Both by a Capacitor
500
µH
1
6
2
5
22 nF
220 V~
3
4
iil410_15
Figure 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 sepa-
rated from the IL410/ IL4108 during operation. The above men-
tioned effects do not occur with IL410/ IL4108 circuits which are
Document Number 83627
Rev. 1.4, 26-Apr-04
www.vishay.com
7
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