Optical coupler knowledge introduction and common models

Optocoupler is also called photoelectric isolator photoelectric coupler, referred to as optocoupler. It is a device that transmits electrical signals through the medium of light, usually the light emitting device (infrared light emitting diode Led) and the light receiving device (photosensitive semiconductor tube) are packaged together. Because the optical coupler input and output are isolated from each other, it has good electrical insulation and anti-interference ability, so it is widely used in digital circuits. Common types: PC817, TLP185GB HCNR201, TLP351, EL816Y, PC851, MOC3051M, etc

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