资料介绍
Optocouplers are widely used in providing galvanic isolation because of their true isolation characteristics. The heart of a modern optocoupler is an input infra-red-emitting LED and an output photodetector, sepa-rated by a light transmissive medium, that can also act as an insulation layer. Or an additional light transmis-sive dielectric layer can be added to provide insulation. The photodetector can be a phototransistor, a photo-diode with a transistor, or an integrated detector/logic integrated circuit. Most optocouplers are certifed to the basic safety standards as outlined by UL1577, CSA and IEC/DIN EN/EN 60747-5-2.
Stacked LED Technology Enables Highly Integrated Optocouplers
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Introduction Optocoupler Manufacturing Technologies
Optocouplers are widely used in providing galvanic Optocouplers operate based on the light coupling be-
isolation because of their true isolation characteristics. tween the LED and the photodetector IC, while provid-
The heart of a modern optocoupler is an input infra- ing high voltage insulation, ranging from 2.5 kV to 6 kV,
red-emitting LED and an output photodetector, sepa- between the emitter and detector. The degree of light
rated by a light transmissive medium, that can also act coupling depends on the formation of the lightguide.
as an insulation layer. Or an additional light
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