A Universal-Input Single-Stage High-Power-Factor Power Supply for HB-LEDs Based on Integrated Buck-Flyback Converter

Gacio, D.; Alonso, J.M.; Calleja, A.J.; Garcia, J.; Rico-Secades, M.

doi:10.1109/apec.2009.4802714

Cited by 132 publications

(120 citation statements)

References 7 publications

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“…The LED employed in this study (i.e., DG-82A83C-001-5S-3) has forward voltage drop V LED = 3.0 V and equivalent series resistance r LED = 6.3 Ω at 60 mA. The LED array can then be characterized by r T and V T as follows [10]:…”

Section: A Selection Of the Convertermentioning

confidence: 99%

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

Park¹,

Choi²,

Cheon³

et al. 2014

Journal of Power Electronics

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A new active LED driver with high power factor (PF) and low total harmonic distortion (THD) compatible with a rapid-start ballast is proposed. An LC input filter is attached to the ballast to increase PF and reduce THD. A boost converter is then installed to regulate the LED current, where an unstable operating region has been newly identified. The unstable region is successfully stabilized by feedback control with two zeroes. The extremely high overall system of the 10th order is completely analyzed by the newly introduced phasor transformed circuits in static and dynamic analyses. Although a small DC capacitor is utilized, the flicker percentage of the LED is drastically mitigated to 1% by the fast controller. The proposed LED driver that employs a simple controller with a start-up circuit is verified by extensive experiments whose results are in good agreement with the design.

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Section: A Selection Of the Convertermentioning

confidence: 99%

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

Park¹,

Choi²,

Cheon³

et al. 2014

Journal of Power Electronics

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“…The need for power factor correction (PFC) on the drivers supplied by mains also points to two-stage [7], single-stage [8] or integrated switching power converters [9], [10].…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the photometrical impacts of several current waveforms on power white LEDs

Almeida

Nogueira

Guedes

et al. 2011

XI Brazilian Power Electronics Conference

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Since light-emitting diodes (LEDs) are a rising lighting technology, a great amount of research is currently being focused on driving techniques for these current-fed semiconductor devices. For realizing efficient current drivers, power electronics is usually employed. This work focuses on studying the impacts that several high and low frequency current waveforms commonly found on power electronic drivers may have on the photometrical and colorimetrical performance of the LEDs themselves. Empirical evidence obtained under controlled experiments is provided to correlate important features of the LEDs to the current levels and waveforms.

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“…If galvanic isolation is achieved in the first stage, flyback family converters [45,46] are the most suitable option. Common isolated second stages are HB LLC resonant converter [51][52][53][54], Asymmetrical HB (AHB) [55,56], flyback family [50,57,58], etc. Non-isolated topologies for the second stage are buck [59], TIBuck [60][61][62][63][64][65] (taking advantage of the possibility of two isolated outputs in the first stage) or any other non-isolated topology.…”

Section: Two-stage Switching Topologiesmentioning

confidence: 99%

An Overview of the AC-DC and DC-DC Converters for LED Lighting Applications

2012

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Original scientific paperHigh-Brightness Light Emitting Diodes (HB-LEDs) are considered the future trend in lighting not only due to their high efficiency and high reliability, but also due to their other outstanding characteristics: chromatic variety, shock and vibration resistance, etc. Nevertheless, they need the development of new power supplies especially designed for boosting and taking advantage of their aforementioned characteristics. Besides, their behaviour is completely different from the rest of lighting devices and, consequently, it should be also taken into account in the design of the converters used to drive them. As a result, many well-known topologies have been optimized or redesigned in order to be used in LED-lighting applications and many new topologies have come up in the recent years with the same purpose.In this paper, the main HB-LED characteristics will be explained, highlighting how they influence the design of their power supplies. After, the main topologies will be presented from the simplest to the most complex ones, analysing their advantages and disadvantages. Key words: AC-DC converters, DC-DC converters, LED, LightingPregled AC-DC i DC-DC pretvarača za primjene u LED rasvjeti. Svjetleće diode s visokom razinom svjetline (HB-LED) smatraju se budućim trendom u rasvjeti zahvaljujući ne samo visokom stupnju efikasnosti i pouzdanosti, nego i njihovim izvanrednim svojstvima: raznolikost boja, otpornost na udarce i vibracije i sl. Ipak, s ciljem potpunog iskorištenja prethodno spomenutih svojstava, potrebno je razviti nove, posebno osmišljene izvore napajanja. Osim toga, ponašanje im se posve razlikuje od ostalih tipova rasvjete što je potrebno uzeti u obzir pri projektiranju pretvarača za njihovo napajanje. Kao posljedica toga, mnoge su poznate topologije pretvarača optimirane ili preoblikovane posebno za primjenu u LED rasvjeti, a zadnjih nekoliko godina mnoge nove su se tek pojavile.U ovomčlanku objašnjena su osnovna HB-LED svojstva naglašavajući njihov utjecaj na razvoj izvora napajanja. Uz to, prikazane su osnovne topologije, od najjednostavnijih do najsloženijih, ujedno analizirajući prednosti i nedostatke pojedinih.

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A Universal-Input Single-Stage High-Power-Factor Power Supply for HB-LEDs Based on Integrated Buck-Flyback Converter

Cited by 132 publications

References 7 publications

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

Robust Active LED Driver with High Power Factor and Low Total Harmonic Distortion Compatible with a Rapid-Start Ballast

An experimental study on the photometrical impacts of several current waveforms on power white LEDs

An Overview of the AC-DC and DC-DC Converters for LED Lighting Applications

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