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Electrothermal model of optocoupler for SPICE

✍ Scribed by Krzysztof Górecki; Witold J. Stepowicz

Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
279 KB
Volume
22
Category
Article
ISSN
0894-3370

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✦ Synopsis

Abstract

In 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. Copyright © 2008 John Wiley & Sons, Ltd.

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