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ÖZÜTÜRK, ERDEM

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ÖZÜTÜRK

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    A system and a method to measure the junction temperature of leds
    (Elsevier, 2021-02-26) Özütürk, Erdem; ÖZÜTÜRK, ERDEM; Bursa Uludağ Üniversitesi/Mühendislik Fakültesi/Elektrik-Elektronik Mühendisliği Bölümü.; 0000-0002-5733-746X; AAO-7340-2021; AAO-9572-2021
    In this study, a new method of measuring LED junction temperature is given. The linear relative radiant power/temperature variation has been utilized in this method. This method can be applied at pulsed high currents of LED. The measurement system used here consists of a pulse oscillator, an appropriate LED driving circuit and a photodetector circuit. A photodetector voltage, which is proportional to the radiant power of LED, has been measured by using an oscilloscope, and junction temperature have been determined by making easy calculations on it. A constant, which is obtained from linear relative radiant power/junction temperature characteristics, has been used in this calculation.