Advantages of Optocoupler | disadvantages of Optocoupler
This page covers advantages and disadvantages of Optocoupler. It mentions Optocoupler advantages or benefits and Optocoupler disadvantages or drawbacks.
What is Optocoupler?
It consists of a pair of infrared LED and phototransistor. When signal is applied to infrared LED, it turns ON and consecutively light falls on phototransistor. As a result, phototransistor starts conducting. Here no electric connection between LED and phototransistor of optocoupler.
• The figure-2 depicts triggering circuit which uses optocoupler.
In this circuit, triggering pulses are given to LED of optocoupler.
• Optocouplers are used for various applications which include inverters, SMPS, choppers, AC motor drives etc.
Benefits or advantages of Optocoupler
Following are the benefits or advantages of Optocoupler:
➨It offers very good response at lower frequencies.
➨Compact and cheaper optocoupler devices are available.
Drawbacks or disadvantages of Optocoupler
Following are the drawbacks or disadvantages of Optocoupler:
➨Optocoupler needs external biasing voltage for its operation.
➨Higher frequency response is poor.