IL4208-X007

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Optoisolator circuits are used to provide electrical isolation between two circuits. A popular choice is the IL4208-X007, which fits many applications due to its comprehensive features. This article covers the application field and working principle of the IL4208-X007.

The IL4208-X007 from Infineon is a 6-pin 800 V optoisolator with an SCR output. It has a wide VCC range between 2.5 V to 18 V and a distinguished low power consumption of 8 mW. It has a small PCB footprint of just 5.2 mm x 5.4 mm and a rather wide temperature range of -40 °C to 105 °C. All of these features, in combination with its low cost, make the IL4208-X007 an ideal choice for many applications.

The IL4208-X007 is best used in the following applications:

• DC-DC converters
• AC-DC converters
• Lighting systems
• USB mobility devices
• White goods
• Industrial electronic controls

In many of these applications, an optoisolator is used to provide an electrical isolation between two circuits. The IL4208-X007 implements an SCR output, which can be used to drive an AC/-DC or DC/DC converter. Depending on the application, the IL4208-X007 can switch up to 800 V with an on-state current of 23 A.

The way the IL4208-X007 works is quite straightforward. It consists of two parts - an LED on one side and an integrated circuit with an SCR output on the other side. The LED is driven by the optical input on the IL4208-X007, which is then transferred into a current and is conducted through the optoisolator. This current is then amplified and sent to the SCR output, where it is converted into a voltage to drive the AC/-DC or DC/DC converter.

The optoisolator also has a control input. This input is used to adjust the leakage current. A resistance of 500 kW is usually used to connect the control input to the VCC supply, which limits the leakage current to less than 2 µA. This ensures that the circuit is safe to operate, even in case of an unexpected power surge.

In summary, the IL4208-X007 from Infineon is a great optoisolator choice for many applications due to its comprehensive features. Its wide VCC range, low power consumption and small PCB footprint make it an ideal choice. It works by taking an optical input signal and transferring it to an SCR output, which can be used to drive an AC/-DC or DC/DC converter. Finally, the control input can be used to adjust the leakage current for safety.

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