Electrothermal model of a power LED for SPICE

Górecki, Krzysztof

doi:10.1002/jnm.811

Cited by 30 publications

(18 citation statements)

References 17 publications

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“…Up to now the most straightforward method was to create a SPICE macro model where temperature dependence was accounted for with the help of controlled sources. Such an approach was taken both by K. Górecki [4], [5] and by C. Negrea et al [6]. Modeling the electro-thermal behavior in both models is similar to ours though these authors calculate the net I-V characteristic of the LED and do not split the diode current into a dissipative and radiative part.…”

Section: Introductionmentioning

confidence: 85%

“…They way how these authors consider and model the light output is different from our approach. From this perspective the published macro models [4], [5], [6] are somewhat ad hoc. The background behind this modeling approach is that relatively simple testing hardware is used to measure the LED characteristics for model parameter identification purposes.…”

Section: Introductionmentioning

confidence: 99%

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Practical aspects of implementation of a multi-domain LED model

Poppe

Szalai

2014

2014 Semiconductor Thermal Measurement and Management Symposium (SEMI-THERM)

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Based on prior paper on multi-domain modeling of LEDs this paper provides an overview of the implementation issues of such model. On one hand the option of simplifying SPICE like macro models by using a commercial, fully coupled electro-thermal simulator is shown. On the other hand implementation details of an LED model are shown in which the current components responsible for heat dissipation and light emission are described separately. Using the current component responsible for light emission the radiant flux of the LED can be calculated directly. As a novelty in LED multid-domain modeling, using the "efficacy of radiation of the light source" is proposed for modeling the emitted luminous flux. The applicability of this quantity is demonstrated by an example.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Practical aspects of implementation of a multi-domain LED model

Poppe

Szalai

2014

2014 Semiconductor Thermal Measurement and Management Symposium (SEMI-THERM)

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“…On the contrary, in LEDs, some part of the electrical energy is transformed into light (the power P L ), and some part into heat (Poppe and Lasance, 2009;Górecki, 2012aGórecki, , 2012bPoppe et al, 2006). Therefore, the thermal power can be calculated using the following equation (Górecki and Górecka, 2011;Poppe and Lasance, 2009;Górecki, 2012aGórecki, , 2012b:…”

Section: Introductionmentioning

confidence: 99%

Measurements of thermal resistance of power LEDs

Górecki

2014

Microelectronics International

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Purpose -The purpose of this paper is to present a new method of measuring thermal resistance of power light-emitting diodes (LEDs). Properties of power LEDs strongly depend on their internal temperature. The value of this temperature depends on the cooling conditions characterized by thermal resistance. Design/methodology/approach -The new method of measuring the value of this parameter belongs to the group of electric methods. In this method, the problem of estimating the value of electrical power converted into light is solved. By comparing the values of the case temperature obtained for the LED operating in the forward mode and the reverse-breakdown mode, the thermal power is estimated. On the basis of the measured value of the thermally sensitive parameter (the LED forward voltage) and the estimated value of the thermal power, thermal resistance is calculated. Findings -The elaborated method was used to measure thermal resistance of the selected types of power LEDs operating at different cooling conditions. The correctness of the elaborated measurement method was proved by comparing the results of measurements obtained with the use of the new method and the infrared method. Research limitations/implications -On the basis of the obtained results of measurements and the catalog data of the tested diodes, the dependence of the measurement error of thermal resistance of the LED on its luminous efficiency is discussed. Originality/value -The new measurement method is easy to use and more accurate than the classical method of thermal resistance measurement of the diode.

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“…Within last twenty years there has been observed essential improvement of exploitive parameters of considered class of semiconductor devices and a decrease in their price [1,2,3]. In numerous publications both properties of single LEDs [4,5,6,7] and LED lamps [8,9,10,11] are considered. As the great advantage of solid-state light sources seems to be long life time [4,12], the essential problem is to remove heat generated in the considered devices [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…As the great advantage of solid-state light sources seems to be long life time [4,12], the essential problem is to remove heat generated in the considered devices [13,14]. In papers [6,7,15,16] the strong influence of self-heating phenomena and mutual thermal interactions on the course of characteristics of power LEDs are shown.…”

Section: Introductionmentioning

confidence: 99%

The influence of the mounting manner of the power LEDs on its thermal and optical parameters

Górecki

Ptak

2014

2014 Proceedings of the 21st International Conference Mixed Design of Integrated Circuits and Systems (MIXDES)

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The paper refers to the investigation results concerning thermal and optical properties of power LEDs. The measuring-set to measure thermal and optical parameters of the considered semiconductor devices is described and some results of measurements of transient thermal impedance and illuminance emitted by power LEDs operating at different cooling conditions are presented. Investigations were performed both for LEDs operating solely and sets of such diodes situated on the common heat-sink.

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Electrothermal model of a power LED for SPICE

Cited by 30 publications

References 17 publications

Practical aspects of implementation of a multi-domain LED model

Practical aspects of implementation of a multi-domain LED model

Measurements of thermal resistance of power LEDs

The influence of the mounting manner of the power LEDs on its thermal and optical parameters

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