VOD217T Isolators

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Introduction

Optoisolators, also referred to as optocouplers or photocouplers, are electronic devices that use optical signals to isolate different electrical circuits. They are used to protect sensitive electronic circuits from dangerous spikes, high-voltage discharges, strong magnetic fields, and other forms of electromagnetic interference. One of these optoisolators is the VOD217T, a transistor-photovoltaic output device that is commonly used in automotive applications. In this article, we will discuss the application field and working principle of the VOD217T.

Application Field

The VOD217T optoisolator is widely used in automotive applications because of its ability to withstand high voltage and wide temperature ranges. It is a reliable replacement for aging and vulnerable optocouplers that are found in many automotive systems. The device is typically used in engine control systems, transmission control systems, and air bag systems. It is also used in engine components such as spark plugs, temperature sensors, relays, and sensors.

The VOD217T also has other applications. It is used in computers to help protect sensitive components from electrical noise. It is also used in robotic automation systems, test and measurement systems, and consumer electronics. In addition, due to its safety features, it is becoming more popular in safety-critical medical equipment.

Working Principle

The VOD217T is a transistor-photovoltaic output device. It contains an infrared LED and a phototransistor, both of which are isolated from each other with an internal dielectric barrier. The infrared LED emits light when current is applied through its anode and cathode. The light passes through the barrier and is detected by the phototransistor, which conducts current in proportion to the intensity of the received light. This causes a voltage difference between the collector and emitter of the transistor, which can be used to control other electronic components.

The VOD217T has a built-in filter that reduces interference from magnetic fields and EMI. It also has low capacitance, which helps protect delicate circuits from electrical noise. In addition, the device is capable of operating in a wide temperature range from -40°C to 125°C and has a high voltage range, making it suitable for harsh automotive environments.

Conclusion

The VOD217T is a reliable optoisolator, suitable for a variety of automotive applications. It has a robust design, and its high voltage range and wide temperature range make it suitable for harsh environments. Its built-in filter reduces interference from magnetic fields and EMI, and its low capacitance helps protect circuits from electrical noise. The device is easy to use and provides protection for delicate components in automotive systems, computers, robotic automation systems, and consumer electronics.

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