6N137M

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Optoisolators are electrical devices designed to provide electrical isolation between input and output circuits. The 6N137M optoisolator is an excellent example of these isolators, specifically fitting into the Logic Output category. This article will explain what 6N137M optoisolators are and their practical applications, as well as explain how they work.

What Is a 6N137M?

The 6N137M is a small 4-pin DIP (dual in-line package) device that fits into the Logic Output category of optoisolators. The primary components are an infrared LED and a photosensitive detector. These two components are separated by an insulating barrier which increases the device’s electrical isolation, or ability to keep signals from the input side of the device from leaking into the output side. This type of optoisolator is especially useful for logic circuitry because of its high speed response time of 1$\mu$s.

Applications of 6N137M

The 6N137M is used in a variety of applications which require electrical isolation between input and output circuits. It is particularly useful in devices such as power supplies, which need to be able to switch AC current reliably and safely without power loss through the insulation barrier. The optoisolator can also be used in gate drivers, providing a means for isolating logic circuitry from higher voltages. The 6N137M optoisolator is also beneficial for protecting industrial process control systems from noise, resulting in greater accuracy and safety.

Working Principle of 6N137M

The 6N137M works by using a phototransistor as its output, which is activated when it receives light from an infrared LED source. When light hits the phototransistor, it will cause the transistor to conduct, resulting in current flow across the isolated gap between the input and output sides of the optoisolator. This current flow enables the isolated output side of the optoisolator to be powered from the input side, resulting in electrical isolation between the two circuits.

In the 6N137M version of optoisolators, the output transistor is typically a Darlington pair transistor, which has a high gain and can switch relatively higher currents across the gap. This allows them to be used in heavy-duty applications such as power supplies and industrial process control systems. When the input current to the infrared LED turns on, it will cause the output transistor to switch on, allowing current to flow across from the input side of the optoisolator. When the input current turns off, the output will also turn off.

Conclusion

The 6N137M optoisolator is a very useful device for providing electrical isolation between input and output circuits. It is particularly useful in applications such as power supply switching and industrial process control, due to its high response time and the current capacity of its output transistor. It uses an infrared LED source and a phototransistor as its primary components, and when the LED is triggered on, it causes the output transistor to conduct, providing electrical isolation between the input and output sides of the device.

The specific data is subject to PDF, and the above content is for reference