Feature: 

Small size, long life, contactless, strong anti-interference, high insulation voltage, and unidirectional signal transmission. Optocouplers enable electrical isolation, level conversion, and pulse amplification. Widely used in switching power supplies for voltage feedback to achieve precise regulation.

Used in electrical insulation, level conversion, interstage coupling, switching circuits, signal isolation, pulse signal amplification, long-distance signal transmission, and input/output interfaces. In a switching power supply, a linear optocoupler can be used to form a voltage feedback circuit, which can adjust the control terminal current to change the duty cycle and achieve precise voltage regulation.

Application: