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A new method to calculate LED's thermal impedance and a new voltage-current formula of LED

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dc.contributor.authorÖzütürk, Erdem
dc.contributor.buuauthorÖZÜTÜRK, ERDEM
dc.contributor.departmentMühendislik Fakültesi
dc.contributor.departmentElektrik-Elektronik Mühendisliği Bölümü
dc.contributor.orcid0000-0002-5733-746X
dc.contributor.researcheridAAO-7340-2021
dc.date.accessioned2025-01-17T07:08:26Z
dc.date.available2025-01-17T07:08:26Z
dc.date.issued2024-06-19
dc.description.abstractThe thermal impedance and voltage-current relation of LEDs can be obtained using a photodetector response to pulsed light emitted by LEDs. In this study, LEDs have been driven by pulsed high currents. Photodetector voltage is proportional to the radiant power of LED. A triangle has been drawn on the top of the photodetector voltage figure, and some geometrical magnitudes have been measured. The junction temperature can be calculated using these magnitudes and the LED's relative radiant power-junction temperature coefficient. Thermal impedance can be calculated if junction temperature and ambient temperature difference are divided by thermal power dissipated from the LED. In this study, the thermal impedance of LEDs and their error have been calculated and a new voltage-current formula for LEDs has been given. The formulas for LED junction temperature-time and thermal impedance-time variations have been obtained. Besides these, the maximum pulse duration of the current pulse that the LED can work without breaking down has been calculated.
dc.identifier.doi10.1007/s11082-024-07126-8
dc.identifier.eissn1572-817X
dc.identifier.issn0306-8919
dc.identifier.issue7
dc.identifier.scopus2-s2.0-85196376346
dc.identifier.urihttps://doi.org/10.1007/s11082-024-07126-8
dc.identifier.urihttps://link.springer.com/article/10.1007/s11082-024-07126-8
dc.identifier.urihttps://hdl.handle.net/11452/49537
dc.identifier.volume56
dc.identifier.wos001260639600004
dc.indexed.wosWOS.SCI
dc.language.isoen
dc.publisherSpringer
dc.relation.journalOptical and Quantum Electronics
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi
dc.relation.tubitakTUBITAK
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectLed
dc.subjectJunction temperature
dc.subjectThermal impedance
dc.subjectVoltage-current formula
dc.subjectScience & technology
dc.subjectTechnology
dc.subjectPhysical sciences
dc.subjectEngineering, electrical & electronic
dc.subjectQuantum science & technology
dc.subjectOptics
dc.subjectEngineering
dc.subjectPhysics
dc.titleA new method to calculate LED's thermal impedance and a new voltage-current formula of LED
dc.typeArticle
dspace.entity.typePublication
local.contributor.departmentMühendislik Fakültesi/Elektrik-Elektronik Mühendisliği Bölümü
local.indexed.atWOS
local.indexed.atScopus
relation.isAuthorOfPublication1d108217-5f0f-475c-8d3b-c4fe2c69b400
relation.isAuthorOfPublication.latestForDiscovery1d108217-5f0f-475c-8d3b-c4fe2c69b400

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