6N138W

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Optoisolators are widely used in many industry application, including medical, automotive and industrial applications. The 6N138W is a popular optoisolator that is used for noise immunity, isolation, ground loop elimination, and other applications. It integrates a TRIAC driver, photovoltaic detector and MOSFET output in a single, compact package. In this article, we\'ll discuss the 6N138W application field and working principle.

Application Field

The 6N138W is a 4-pin optoisolator which can be used in analog, digital, and mixed signal systems. It has a high isolation voltage, low power, and low signal voltage level. It is applicable as a voltage/current/temperature/pressure/light/humidity/differential isolator. The low signal switching level makes it ideal for signal isolation in both low voltage and high voltage systems.

The 6N138W optoisolator can be used as an electrical isolator and transformer for high-frequency signal transmission. It can also be used to obtain zero-crossing detections, filter out high frequencies, and control time-critical processes. It is also valuable in medical equipment where high isolation is critical and can be used to design sensing/controlling systems.

The 6N138W is well suited for driving AC loads such asDIP switches, contactors, and motors. Other applications include process control, communication systems, motion control, and digital systems. It is also used to replace bulky mechanical relays and as a solid-state relay.

Working Principle

The 6N138W consists of four terminals connected together- an LED control input, a photo-transistor output and two resistors. The input terminals are connected to an LED so that when a voltage is applied to the LED an electron beam is generated that stimulates the photo-sensitive transistor circuit.

The photo-transistor acts as an amplifier when stimulated by the light. When the input voltage is applied to the LED, the photo-transistor turns on and current flows from the collector to the emitter of the transistor. This current is used to operate external circuitry.

The 6N138W also uses a current-limiting resistor network to protect the LED from damage caused by excessive current. This resistor network is configured to limit the current flowing through the LED to a safe level. The LED is also protected from electrical noise and fluctuating input voltages.

The 6N138W optoisolator is designed to provide reliable isolation between two circuits, and is based on the principle of “Transistor Photo-Voltaic” technology. This technology uses an LED to produce a light beam which activates the photo detector. This technology offers high performance and high-speed switching, making it suitable for a variety of industrial applications.

Conclusion

The 6N138W is an extremely versatile optoisolator with a variety of applications in the industrial, automotive and medical fields. It offers high isolation voltage, low power, and low signal voltage levels. It is applicable as a voltage/current/temperature/pressure/light/humidity/differential isolator. It can be used to design sensing and controlling systems as well as driving AC loads such as actuators, contactors and motors.

It is based on “Transistor Photo-Voltaic” technology which uses an LED to generate a light beam that stimulates the photo detector. This technology provides reliable isolation between two circuits as well as high performance and high-speed switching.

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