The IL410/ IL4108 consists of a GaAs IRLED optically
coupled to a photosensitive zero crossing TRIAC network. The TRIAC consists of two inverse parallel connected monolithic SCRs. These three semiconductors are assembled in a six pin dual in-line
package.
High input sensitivity is achieved by using an emitter
follower phototransistor and a cascaded SCR predriver resulting in an LED trigger current of less than
2.0 mA (DC).
The IL410/ IL4108 uses two discrete SCRs resulting
in a commutating dV/dt greater than 10 kV/µs. The
use of a proprietary dV/dt clamp results in a static dV/
dt of greater than 10 kV/µs. 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 phototransistor, disabling the first stage SCR predriver.
The zero cross line voltage detection circuit consists
of two enhancement MOSFETS and a photodiode.
The inhibit voltage of the network is determined by the
enhancement voltage of the N-channel FET. The Pchannel 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 phototransistor, disabling the first stage SCR predriver.
The 600/800 V blocking voltage permits control of offline voltages up to 240 VAC, with a safety factor of
more than two, and is sufficient for as much as
380 VAC.
The IL410/ IL4108 isolates low-voltage logic from
120, 240, and 380 VAC lines to control resistive,
inductive, or capacitive loads including motors, solenoids, high current thyristors or TRIAC and relays.
Document Number 83627
Rev. 1.4, 26-Apr-04
www.vishay.com
1
IL410/ IL4108
Vishay Semiconductors
Order Information
Par tRemarks
IL410600 V V
IL4108800 V V
IL410-X006600 V V
IL410-X007600 V V
IL410-X009600 V V
IL4108-X006800 V V
IL4108-X007800 V V
IL4108-X009800 V V
For additional information on the available options refer to
Option Information.
Absolute Maximum Ratings
T
= 25 °C, unless otherwise specified
amb
Stresses in excess of the absolute Maximum Ratings can cause permanent damage to the device. Functional operation of the device is
not implied at these or any other conditions in excess of those given in the operational sections of this document. Exposure to absolute
Maximum Rating for extended periods of the time can adversely affect reliability.
, DIP-6
DRM
, DIP-6
DRM
, DIP-6 400 mil (option 6)
DRM
, SMD-6 (option 7)
DRM
, SMD-6 (option 9)
DRM
, DIP-6 400 mil (option 6)
DRM
, SMD-6 (option 7)
DRM
, SMD-6 (option 9)
DRM
Input
Paramete rTest conditionSymbolVal ueUnit
Reverse voltageV
Forward currentI
Surge currentI
Power dissipationP
Derate from 25 °C1.33mW/°C
R
F
FSM
diss
6.0V
60mA
2.5A
100mW
Output
Paramete rTest conditionPar tSymbolVal ueUnit
Peak off-state voltageIL410V
IL4108V
RMS on-state currentI
Single cycle surge current3.0A
Total power dissipationP
Derate from 25 °C6.6mW/°C
DM
DM
TM
diss
600V
800V
300mA
500mW
Coupler
Paramete rTest conditionSymbolVal ueUnit
Isolation test voltage (between
emitter and detector, climate per
DIN 500414, part 2, Nov. 74)
Pollution degree (DIN VDE
0109)
Creepage≥ 7.0mm
Clearance≥ 7.0mm
t = 1.0 min.V
ISO
5300V
2
RMS
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2
Document Number 83627
Rev. 1.4, 26-Apr-04
IL410/ IL4108
Vishay Semiconductors
ParameterTest conditionSymbolValueUnit
Comparative tracking index per
DIN IEC 112/VDE 0303 part 1,
group IIIa per DIN VDE 6110
Isolation resistanceV
Storage temperature rangeT
Ambient temperature rangeT
Soldering temperaturemax. ≤ 10 sec. dip soldering
= 500 V, T
IO
V
= 500 V, T
IO
= 25 °CR
amb
= 100 °CR
amb
≥ 0.5 mm from case bottom
T
IO
IO
stg
amb
sld
Electrical Characteristics
T
= 25 °C, unless otherwise specified
amb
Minimum and maximum values are testing requirements. Typical values are characteristics of the device and are the result of engineering
evaluation. Typical values are for information only and are not part of the testing requirements.
Critical rate of rise of voltage at
current commutation
Critical rate of rise of on-statedI/dt
Thermal resistance, junction to
ambient
Coupler
Paramete rTest conditionSymbolMinTy p.MaxUnit
Critical rate of rise of coupled
input/output voltage
Common mode coupling
capacitance
Capacitance (input-output)f = 1.0 MHz, V
Isolation resistanceV
VD = 0.67 V
= 0.67 V
V
D
V
= 0.67 V
D
≤ 15 A/ms, TJ = 25 °C
dI/dt
crq
V
= 0.67 V
D
≤ 15 A/ms, TJ = 80 °C
dI/dt
crq
= 0 A, VRM = VDM = V
I
T
= 500 V, T
IO
V
= 500 V, T
IO
, TJ = 25 °CdV/dt
DRM
, TJ = 80 °CdV/dt
DRM
,
DRM
,
DRM
= 0 VC
IO
= 25 °CR
amb
= 100 °CR
amb
D(RMS)
dV/dt
dV/dt
dVIO/dt10000V/µs
C
CM
IO
IO
IO
10000V/µs
cr
cr
crq
crq
cr
R
thja
5000V/µs
10000V/µs
5000V/µs
8.0A/µs
150°C/W
0.01pF
0.8pF
≥ 10
≥ 10
12
11
Ω
Ω
Power Factor Considerations
A snubber isn’t needed to eliminate false operation of
the TRIAC driver because of the IL410/ IL4108’s high
static and commutating dV/dt with loads between 1.0
and 0.8 power factors. When inductive loads with
power factors less than 0.8 are being driven, include
a RC snubber or a single capacitor directly across the
device to damp the peak commutating dV/dt spike.
Normally a commutating dV/dt causes a turning-off
device to stay on due to the stored energy remaining
in the turning-off device.
But in the case of a zero voltage crossing optotriac,
the commutating dV/dt spikes can inhibit one half of
the TRIAC from turning on. If the spike potential
exceeds the inhibit voltage of the zero cross detection
circuit, half of the TRIAC will be held-off and not turnon. This hold-off condition can be eliminated by using
a snubber or capacitor placed directly across the
optotriac as shown in Figure 1. Note that the value of
the capacitor increases as a function of the load current.
Figure 1. Shunt Capacitance vs. Load Current
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Document Number 83627
Rev. 1.4, 26-Apr-04
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