參數(shù)資料
型號(hào): IL4118-X009
廠商: VISHAY SEMICONDUCTORS
元件分類: 光電耦合器
英文描述: Optocoupler Triac AC-OUT 1-CH 600VDRM 6-Pin PDIP SMD Tube
中文描述: Triac & SCR Output Optocouplers Phototriac Output, Zero Crossing
文件頁數(shù): 6/8頁
文件大?。?/td> 135K
代理商: IL4118-X009
www.vishay.com
6
For technical questions, contact:
optocoupleranswers@vishay.com
Document Number: 83628
Rev. 1.8, 20-Oct-10
IL4116, IL4117, IL4118
Vishay Semiconductors
Optocoupler, Phototriac Output, Zero
Crossing, Very Low Input Current
This hold-off condition can be eliminated by using a snubber
and also by providing a higher level of LED drive current. The
higher LED drive provides a larger photocurrent which
causes the triac to turn-on before the commutating spike
has activated the zero cross detection circuit. Fig. 10 shows
the relationship of the LED current for power factors of less
than 1.0. The curve shows that if a device requires 1.5 mA
for a resistive load, then 1.8 times (2.7 mA) that amount
would be required to control an inductive load whose power
factor is less than 0.3 without the snubber to dump the
spike.
Fig. 9 - Shunt Capacitance vs. Load Current vs. Power Factor
Fig. 10 - Normalized LED Trigger Current
APPLICATIONS
Direct switching operation:
The IL4116, IL4117, IL4118 isolated switch is mainly suited
to control synchronous motors, valves, relays and
solenoids. Fig. 11 shows a basic driving circuit. For resistive
load the snubber circuit R
S
C
S
can be omitted due to the
high static dV/dt characteristic.
Fig. 11 - Basic Direct Load Driving Circuit
Indirect switching operation:
The IL4116, IL4117, IL4118 switch acts here as an isolated
driver and thus enables the driving of power thyristors and
power triacs by microprocessors. Fig. 12 shows a basic
driving circuit of inductive load. The resister R1 limits the
driving current pulse which should not exceed the maximum
permissible surge current of the IL4116, IL4117, IL4118.
The resister R
G
is needed only for very sensitive thyristors or
triacs from being triggered by noise or the inhibit current.
Fig. 12 - Basic Power Triac Driver Circuit
iil4116_07
400
350
300
250
200
150
100
I - Load Current (mA)
50
0
C
S
-
0.001
0.01
0.1
1
C (μF) = 0.0032 (μF) x 10 ^ (0.0066 I
L
(mA))
P
F
= 0.3
I
F
= 2.0 mA
iil4116_08
1.2
1.0
0.8
0.6
0.4
0.2
0
PF - Power Factor
F
0.8
1.2
1.6
2.0
1.0
1.4
1.8
I
Normalized to I
Fth
at PF = 1.0
Fth
21608-1
1
2
3
6
5
4
Control
U1
ZC
R
S
C
S
Hot
Nutral
Inductive load
220/240
VAC
21609-1
1
2
3
6
5
4
Control
U1
ZC
R1
360
R
G
330
R
S
C
S
Hot
Nutral
Inductive load
220/240
VAC
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