Optical coupler, abbreviated as OC, also known as opto-isolator, abbreviated as optocoupler. Optocoupler isolation is to use an optocoupler for isolation. The structure of the optocoupler is equivalent to encapsulating a light-emitting diode and a photosensitive (triode) tube together. The light-emitting diode converts the input electrical signal into an optical signal and transmits it to the photosensitive tube to convert it into an electrical signal output. Since there is no direct electrical connection, it not only couples and transmits the signal, but also has the effect of isolating interference. Apply an electrical signal to the input of the photocoupler to make the light emitting source emit light. The intensity of the light depends on the size of the excitation current. After this light is irradiated on the packaged light receiver, a photocurrent is generated due to the photoelectric effect, which is output by the light receiver The end leads, so that the conversion of electricity to light to electricity is realized.

? Motor phase and current sensing.
? Inverter current sensing.
? Switched mode power supply signal isolation.
? General purpose current sensing and monitoring.
? General purpose analog signal isolation

? Optical Isolation Barrier
? 15kv/us common -mode rejection at V(cm)=1000V.
? Compact,auto-insertable standard sop-8 package
? 0.3mv input offset voltage
? 100kHz bandwidth.
? 0.004% nonlinearity
? Fully differential circuit topology