There are many kinds of optocouplers, unique structure, outstanding advantages, and a wide range of applications, mainly used in the following occasions:
1. Application in logic circuits
Photocouplers can form a variety of logic circuits, and because the anti-interference performance and isolation performance of photocouplers are better than those of transistors, the logic circuits formed by them are more reliable.
2. It is used as a solid switch
In the switching circuit, it is often required to have a good electrical isolation between the control circuit and the switch, which is difficult to do for the general electronic switch, but it is easy to achieve with a photocoupler.
3. Application in trigger circuit
The use of photocouplers in bistable output circuits can effectively solve the problem of isolation between output and load because the light-emitting diodes can be connected into the emitter circuits of the two tubes separately.
4. Application in pulse amplification circuit
Optocouplers are used in digital circuits to amplify pulsed signals.
5. Application on linear circuits
Linear optocouplers are used in linear circuits with high linearity and excellent electrical isolation performance.
6. Application in special occasions
Photocouplers can also be used in a variety of applications such as high-voltage control, replacing transformers, replacing contact relays, and A/D circuits.