LED Technologies for Optocouplers: Fundamental Issues and Hardness Assurance

Johnston, A.H.; Miyahira, T.F.

doi:10.1109/tns.2007.909910

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Cited by 6 publications

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“…In optocouplers the input electrical signal is applied to a photoemitter (typically the LED is used to this end) changing this signal to the optical signal, which reaches by a dielectric waveguide the output device-a photodetector, (e.g. the bipolar phototransistor), and this output component transforms the optical signal to its original electrical form [11,12].…”

Section: Introductionmentioning

confidence: 99%

Electrothermal model of optocoupler for SPICE

Górecki

Stepowicz

2008

Int J Numerical Modelling

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SUMMARYIn the paper a new electrothermal model of the optocoupler for SPICE is proposed. The model is based on electrical models of the LED and the bipolar phototransistor with their parameters dependent on temperature, their thermal models including both the self-heating phenomenon and the mutual thermal interactions between the LED and the phototransistor, and the dependences describing electrical power dissipated in these components. The final form of the electrothermal model of the optocoupler elaborated by the authors, dedicated to the d.c. and a.c. computations, was implemented in SPICE. The usefulness of the new model was experimentally verified for the optocoupler 4N25.

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Section: Introductionmentioning

confidence: 99%