4N28M-V

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Optoisolators are components used in circuit designs to isolate one section of the circuit from other sections of the circuit. Optoisolators - Transistor, Photovoltaic Output are components that contain an LED and a photodiode in the same package. The 4N28M-V optoisolator is one type of these components.

The 4N28M-V is an optoisolator that consists of an infrared emitting diode and an optimized phototransistor detector. The emitter LED portion is automatically turned on when a power supply is applied to the circuit, and the phototransistor side of the device is derived from the illumination of the LED emitter.

The 4N28M-V has a variety of applications, including signal switching circuits, level converters, data signaling, load retention, amplifier inputs, and logic gate inputs. It can also be used for AC and DC power switching, safety and interlock circuits, and fault detection.

The working principle of the 4N28M-V optoisolator is simple. When a power supply is applied to the circuit, the LED emits an infrared light which is then detected by the phototransistor detector. This light energy strikes the base of the phototransistor, which is also called a photo-base transistor, significantly increasing the current flow through the phototransistor. This allows the phototransistor to become activated and allows the signal to pass through the circuit.

The 4N28M-V also has a specific voltage and current range in which it functions properly. It is rated to work at 5V and with a maximum collector current of 50mA. If the voltage exceeds the rated range, it can result in damage to the optoisolator, therefore, it is important to make sure that the circuit design does not exceed the rated voltage and current range.

In conclusion, the 4N28M-V optoisolator is an efficient and reliable device for a variety of applications. Its working principle is straightforward and easy to understand. It is important to make sure that the voltage and current range is kept within the rated range to avoid potential damage to the device.

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