IL4108

Current - On State (It (RMS)) (Max):	300mA
Approvals:	CSA, UR
Supplier Device Package:	6-DIP
Package / Case:	6-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-55°C ~ 100°C
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.16V
Turn On Time:	35µs
Current - Hold (Ih):	500µA
Series:	--
Current - LED Trigger (Ift) (Max):	2mA
Static dV/dt (Min):	10kV/µs
Voltage - Off State:	800V
Voltage - Isolation:	5300Vrms
Number of Channels:	1
Zero Crossing Circuit:	Yes
Output Type:	Triac
Part Status:	Active
Packaging:	Tube

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IL4108 Application Field and Working Principle

The IL4108 is an optically coupled device designed for use as a solid-state, ac to dc switch. It is part of a growing family of optically coupled isolators that use both Triac and SCR output technology. This particular IC is housed in a 4-pin DIP package. The device features a peak blocking voltage of 600V, a VF of 1V, and an LED current of 100mA. It has an operating temperature range of -25C to 85C, and a maximum continuous Collector-Emitter voltage (VEBO) of 5V. The primary function of the IL4108 is to provide a solid-state switch for applications such as motor control, lamp ballasting, relay drivers, etc. The IC is well suited for use as a solid-state AC switch, as it features a low on-state voltage drop and low output capacitance. Additionally, its high blocking voltage and low saturation voltage allow the device to be used in a variety of applications. The internal construction of the IL4108 consists of two sections, the LED output section and the SCR or Triac output section. The LED output section is comprised of two internal light-emitting diodes that are connected in series and optically coupled to the output section. The output section is made up of a Triac/SCR device and a series of output resistors. The core working principle of the IL4108 is based on optical coupling between the input and output sections. When a voltage is applied to the LED section, light is emitted. This light is then detected by the output section, which is equipped with a photo-Coupler. This photo-Coupler senses the light generated by the LED section and triggers the SCR/Triac output device. The resulting output voltage is then passed through a resistor network, resulting in an ON/OFF control signal. In conclusion, the IL4108 is an excellent opto-isolator device, designed for use as a solid-state AC switch. It is housed in a 4-pin DIP package and features a peak blocking voltage of 600V and Vf of 1V. It is well-suited for use in motor control, lamp ballasting and relay drivers, due to its low ON-state voltage drop and low output capacitance. The device’s working principle is based on optical coupling between the input and output sections, which uses the light generated by the LED section to trigger the output SCR/Triac device.

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