SFH6719

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Optoisolators – Logic Output are devices used for electrical isolation, common in many applications. One example of an optoisolator in this format is the SFH6719. This article will discuss the field of applications for the SFH6719 and its working principle.

The SFH6719 is a logic output optoisolator designed to isolate digital logic circuits from each other. It utilizes an LED-phototransistor pair to provide optical isolation. It is housed in a 4-pin dual-in-line (DIP) package and features fast switching times, with an on-off ratio of 200 : 1. It is available with a wide input current range, from 50mA to 1A.

This optoisolator is suitable for many different applications, including industrial robotics, motor control, and automatic test equipment. One popular use is in barrier networking, where the separation of two circuits is required in order to prevent ground loops and electrical overloading issues. The SFH6719 can also be used for controlling electrical appliances in the home, where turned on lights and appliances could otherwise cause an overload in the wiring. It is also used for input/output connection in many consumer electronics, such as TVs, DVD players, and digital photo frames.

The working principle of the SFH6719 is based on the LED-phototransistor pair. The LED light emits photons upon activation of the input voltage, which is then received by the phototransistor. This activates it, which then closes the circuit, providing electrical isolation, and converts the input voltage into output voltage. The optoisolator’s characteristics can be adjusted by adjusting the current supplied to the LED. This allows it to adapt to different input currents.

In conclusion, the SFH6719 is a logic output optoisolator which is used for many different applications, from barrier networking to controlling electrical appliances, and even consumer electronics. It works on the principle of LED-phototransistor pair, emitting photons upon activation of the input voltage and activating the phototransistor to provide electrical isolation and converting the input voltage into output voltage.

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