Comparative analysis of power LEDs dimming methods

Rodrigues, Welbert Alves; Morais, Lenin Martins Ferreira; Donoso-Garcia, P.F.; Cortizo, P.C.; Seleme, Seleme Isaac

doi:10.1109/iecon.2011.6119614

Cited by 17 publications

(14 citation statements)

References 7 publications

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“…This control is known as dimming, which is the most used technique. However, the most attractive strategies in the literature are varying DC levels and pulse width modulation (PWM) [1].…”

Section: Led Dimming Methodsmentioning

confidence: 99%

“…In the era of global warming and increased energy costs, efficiency and sustainable development are a key state development factor [1]. Over 2 billion people in the developing world have no access to electricity [2].…”

Section: Introductionmentioning

confidence: 99%

“…About 20% of the electricity consumed in the world is spent on residential and public lighting. Therefore, there is a demand for high-efficiency lamps [1]. Home power consumption has become an important part of energy consumption.…”

Section: Introductionmentioning

confidence: 99%

“…The variation in the DC level controls the luminous flux emitted by varying the DC current LED amplitude. However, PWM uses a square wave power supply for these devices; thus, the light flux is changed by varying the duty cycle of this signal [1].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A Study on the Working Performance of Dimming Methods for Single- and Multichip Power LEDs

Kıyak

2012

International Journal of Photoenergy

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Light emitting diodes (LEDs) have many positive features, such as long life, low power consumption, and high luminous efficacy. Consequently, they are very attractive for use in many applications. Also, the use of LEDs ensures energy savings. Power LEDs have increasingly been used for general lighting via multichip module technology. The output of power LEDs should be controlled to obtain life and illuminance values in catalog. In this study, the effects of different dimming methods are investigated for single-and multichip LEDs. To achieve this aim, pulse width modulation (PWM) and current variation (CV) dimming methods are applied to single and multichip power LEDs during ten stages of dimming. A current-regulated DC source is used for current variation (CV) dimming, and a driver designed by the researcher is used for pulse width modulation (PWM) dimming. Moreover, all of the applications are made for active and passive cooling. Finally, the results are compared.

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“…This control is known as dimming, which is the most used technique. However, the most attractive strategies in the literature are varying DC levels and pulse width modulation (PWM) [1].…”

Section: Led Dimming Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Study on the Working Performance of Dimming Methods for Single- and Multichip Power LEDs

Kıyak

2012

International Journal of Photoenergy

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“…The approximated model 33 of an LED is considered to select the component values of the proposed driver circuit. In the proposed LED driver, two LED lamps are used.…”

Section: Design Considerationsmentioning

confidence: 99%

A three‐leg resonant converter for two output LED lighting application with independent control

Ramakrishnareddy

Porpandiselvi

Vishwanathan

2019

Circuit Theory & Apps

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A three-leg resonant converter is proposed to drive two light emitting diode (LED) lamps of different power ratings. This may be required when both main and local lighting are essential. The proposed converter is operated simultaneously at two different frequencies. Two series resonant circuits are used to allow two different frequency currents. Each lamp is powered through a series resonant circuit and is controlled independently. LED lamp currents are regulated at the desired operating current by using phase-modulation control and asymmetrical duty ratio control. In addition, pulse-width modulation (PWM) dimming control is implemented for two LED lamps independently. The proposed topology has advantages of zero-voltage switching (ZVS), regulation of lamp currents, independent illumination control, and high efficiency. A 126-W prototype has been developed experimentally to confirm its working principle, performance, and validity.

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Soft switched full‐bridge light emitting diode driver configuration for street lighting application

Ramakrishnareddy

Porpandiselvi

Vishwanathan

2018

IET Power Electronics

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This study presents a light emitting diode driver circuit topology based on a full-bridge configuration with dimming control. It is more suitable for high power lighting loads. The proposed configuration has advantages of zero-voltage switching, reduced component count and high efficiency. It can power multiple lighting loads. Operation of the proposed circuit configuration is explained in detail and it is validated through simulated and experimental results on the 145 W experimental prototype with dimming control.

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Comparative analysis of power LEDs dimming methods

Cited by 17 publications

References 7 publications

A Study on the Working Performance of Dimming Methods for Single- and Multichip Power LEDs

A Study on the Working Performance of Dimming Methods for Single- and Multichip Power LEDs

A three‐leg resonant converter for two output LED lighting application with independent control

Soft switched full‐bridge light emitting diode driver configuration for street lighting application

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