MEASUREMENT OF THE THERMAL IMPEDANCE OF LIGHT-EMITTING DIODES AND LIGHT-EMITTING DIODE MATRICES

被引：0

作者：

Smirnov, V. I. ^{[1
,2
]}

Sergeev, V. A. ^{[1
,2
]}

Gavrikov, A. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Kotelnikov Inst Radio Engn & Elect, Ulyanovsk Branch, Ulyanovsk, Russia

[2] Ulyanovsk State Tech Univ, Ulyanovsk, Russia

来源：

MEASUREMENT TECHNIQUES | 2017年 / 60卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

LED; LED matrix; thermal impedance; pulse-width modulation; harmonic law;

D O I：

10.1007/s11018-017-1157-8

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A measuring instrument of the frequency and current dependences of the modulus and phase of the thermal impedance of LEDs and LED matrices of 100 W and higher is described. The principle of operation of the measuring instrument is based on the transmission through LEDs of a sequence of impulses of direct current that is pulse-width modulated under the harmonic law, and the determination of the variable component of the temperature of the p-n junction of the LED as the voltage changes during intervals between current impulses. An algorithm is presented to determine the component of full thermal resistance of an LED or an LED matrix from the results of processing the frequency dependences of the modulus and phase of the thermal impedance. Examples of implementation of the algorithm are given.

引用

页码：46 / 51

页数：6

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