4N28 Isolators

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 - Transistor, Photovoltaic Output are devices that use light as a means of detecting and allowing communication between two separate electrical circuits. The 4N28 family of optoisolators is designed to provide electrical isolation, typically between two circuits. In this article, we will discuss the application fields and working principles of the 4N28 optoisolator.

The 4N28 family of optoisolators includes two electrical isolators: a photovoltaic output optoisolator and a bipolar transistor output optoisolator. These optoisolators are constructed using a single monolithic chip in a 4-pin package. The devices are designed to withstand up to 1500V peak voltage. The functioning of the 4N28 optoisolators relies on the photoelectric effect, which is the phenomenon whereby the absorption of light generates an electric charge. When an LED - short for light emitting diode - is connected on one side and a transistor on the other, the absorption of light by the LED activates the voltage of the transistor, thereby enabling data transmission.

The 4N28 optoisolator is highly versatile and can be integrated into a wide range of applications. On the consumer level, it’s used in automobile headlights, stage lighting, and other lighting sources. On the industrial level, the optoisolator is used in many automated machines that require electrical isolation, which is generally for safety and signal transmission. It is also used in garage door openers, security systems, heating control systems, and even rides at amusement parks.

To give an example of the 4N28 optoisolator in action, let’s take a look at its use in car headlights. When the headlights are turned on, an electrical signal is generated from the headlight switch and sent to the headlights. This activates the 4N28 optoisolator, which in turn allows a current to flow to the headlights, allowing them to produce light.

The 4N28 optoisolator has a simple yet effective working principle. When light strikes the light-sensitive semiconductor, it causes a voltage to be generated. This voltage is then amplified and then sent into the transistor, which then produces an output current to control the lighting device. The use of this type of optoisolator enables two or more different circuits to communicate without compromising the integrity of the separate circuits.

The 4N28 optoisolator is a highly reliable device and is designed to meet a range of application requirements. It’s ideal for use in industrial applications in which electrical isolation is of primary importance. Its ability to convert light into a signal makes it an ideal choice for a variety of lighting applications. Its high resistance to voltage makes it ideal for use in a variety of potentially hazardous applications such as security systems and automated machine controllers.

In conclusion, the 4N28 optoisolator is a highly versatile device that can be used in a wide range of applications. It is designed to withstand up to 1500V of peak voltage and can be integrated into many automated machine controllers. Its ability to convert light into a signal makes it an ideal choice for a variety of lighting applications. Its high resistance to voltage also makes it ideal for a variety of potentially hazardous applications.

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