10 sec.
鈮?/div>
0.5 mm from
case bottom)................................................... 260
擄
C
Package Dimensions in inches (mm)
Pin One ID.
3
.248 (6.30)
.256 (6.50)
4
5
6
2
1
.335 (8.50)
.343 (8.70)
.039
(1.00)
min.
4擄
typ.
.018 (0.45)
.022 (0.55)
Triac
MT2
Substrate
LED
5
do not
2
Cathode
connect
4 Triac
NC 3
ZCC*
MT1
*Zero Crossing Circuit
6
.300 (7.62)
typ.
LED
Anode 1
.130 (3.30)
.150 (3.81)
18擄 typ.
.020 (.051) min.
.031 (0.80)
.035 (0.90)
.100 (2.54) typ.
.010 (.25)
.014 (.35)
.300 (7.62)
.347 (8.82)
.110 (2.79)
.150 (3.81)
DESCRIPTION
The IL4108 consists of a GaAs IRLED optically coupled to a photosensi-
tive zero crossing TRIAC network. The TRIAC consists of two inverse
parallel connected monolithic SCRs. These three semiconductors are
assembled in a six pin 0.3 inch dual in-line package, using high insula-
tion double molded, over/under leadframe construction.
High input sensitivity is achieved by using an emitter follower pho-
totransistor and a cascaded SCR predriver resulting in an LED trigger
current of less than 2 mA (DC).
The IL4108 uses two discrete SCRs resulting in a commutating dV/dt
greater than 10KV/
碌
s. The use of a proprietary dv/dt clamp results in a
static dV/dt of greater than 10KV/
碌
s. This clamp circuit has a MOSFET
that is enhanced when high dV/dt spikes occur between MT1 and MT2
of the TRIAC. When conducting, the FET clamps the base of the pho-
totransistor, disabling the 鏗乺st stage SCR predriver.
The zero cross line voltage detection circuit consists of two enhance-
ment MOSFETS and a photodiode. The inhibit voltage of the network is
determined by the enhancement voltage of the N-channel FET. The P-
channel FET is enabled by a photocurrent source that permits the FET
to conduct the main voltage to gate on the N-channel FET. Once the
main voltage can enable the N-channel, it clamps the base of the pho-
totransistor, disabling the 鏗乺st stage SCR predriver.
The 800V blocking voltage permits control of off-line voltages up to
240VAC, with a safety factor of more than two, and is suf鏗乧ient for as
much as 380VAC.
The IL4108 isolates low-voltage logic from 120, 240, and 380 VAC lines
to control resistive, inductive, or capacitive loads including motors, sole-
noids, high current thyristors or TRIAC and relays.
Applications include solid-state relays, industrial controls, of鏗乧e equip-
ment, and consumer appliances.
5鈥?41
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