Flicker-Free Electrolytic Capacitor-Less Universal Input Offline LED Driver With PFC

Valipour, Hamed; Rezazadeh, Ghasem; Zolghadri, Mohammad Reza

doi:10.1109/tpel.2015.2504378

Cited by 63 publications

(20 citation statements)

References 33 publications

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“…The idea of obtaining an output low-current ripple for avoiding flicker problem is also found in Ref. [18]. This work offers a two-stage flyback/ Buck converter topology for which a low output current ripple is obtained.…”

Section: Introductionmentioning

confidence: 93%

Analysis of a Resonant AC‐AC LED Driver

Dorel¹,

Csaba²,

MadalinaSabina³

et al. 2017

Optoelectronics - Advanced Device Structures

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The study analyses the performance of different LED circuit configurations feed from a low power resonant driver under pulse quasi-triangular currents. The considered LED driver topology is based on a bridgeless single-stage AC-AC converter with bidirectional switches and a parallel LC resonant tank. The converter performances are simultaneously analyzed in correlation with the most important features, such as the electric efficiency, luminous efficacy, power factor correction capabilities, and flickering implications.

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Section: Introductionmentioning

confidence: 93%

Analysis of a Resonant AC‐AC LED Driver

Dorel¹,

Csaba²,

MadalinaSabina³

et al. 2017

Optoelectronics - Advanced Device Structures

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“…[147], [150]- [155] -Analog: [147]- [155] Yes. [151], [154] No electrolytic: [148]- [150], [152]- [154] Active: multi-stage -active filter [140]- [146]  Yes. [140], [141], [143], [144] -Analog: [140], [143], [144] -Digital: [142], [145], [146] Yes.…”

Section: -99 <10mentioning

confidence: 99%

A Review on Flicker-Free AC–DC LED Drivers for Single-Phase and Three-Phase AC Power Grids

Castro

Vázquez

Arias

et al. 2019

IEEE Trans. Power Electron.

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Light-Emitting Diodes (LEDs) are coming strongly into the lighting market due to their advantages over conventional lighting solutions: energy efficient, controllable in both light and color, long lifetime, lack of a warm-up period and high power density. Some of these advantages will make LED light sources to be more than just a lightbulb, being able to transmit data, control light color, hue and intensity or even detect people in indoor environments. Nevertheless, these advantages attributed to LED capabilities are, in reality, achieved thanks to the LED driver. The present work reviews the current stateof-the-art strategies to drive LEDs from ac power grids with special emphasis into removing the most limiting component from the point of view of the lifetime, which is the electrolytic capacitor, while achieving a flicker-free performance of the light output of the LED driver. Moreover, it focuses on analyzing the required regulations, challenges and applicability of LED drivers in both single-phase and three-phase ac power grids.Note: This only applies for certified dimmable luminaires. Audible noiseLuminaire shall not emit noise above 24 dBA at 1 meter or less at the minimum output.0885-8993 (c)

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“…[10][11][12][13][14][15] Particularly, in the literature, 12 IEEE-P1789 Recommended Practices are adopted as evaluation criteria for output current ripple. For example, a number of methods were proposed to reduce output current ripple using power factor correction (PFC) circuits based on flyback converters, etc.…”

Section: Introductionmentioning

confidence: 99%

“…and supplemented with bidirectional converters or other auxiliary circuits. [10][11][12][13][14][15] Particularly, in the literature, 12 IEEE-P1789 Recommended Practices are adopted as evaluation criteria for output current ripple. There is also a method to reduce output current ripple using a two-stage configuration of PFC circuit and DC-DC converter, in which the second stage is asymmetrical half-bridge (AHB).…”

Section: Introductionmentioning

confidence: 99%

Output Current Ripple Reduction of LED Driver Using Ceramic-Capacitor-Input Circuit and Buck-Boost Converter

Kadota

Hirano

Hatakeyama³

et al. 2019

IEEJ Trans. IA

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This article proposes an LED driver that consists of a ceramic-capacitor-input rectifier and a buck-boost converter. The LED driver has an advantage of long life because it does not contain any electrolytic capacitors. However, the issue with electrolytic capacitor-less LED driver is that the ripple of the smoothed voltage becomes large due to insufficient capacitance of the smoothing capacitor. The proposed method, which uses the discontinuous current mode of a buck-boost converter, reduces the output current ripple under such conditions. Experimental results using a 5.7 W LED driver prototype demonstrate that the proposed method reduces the output current ripple and that the percent flicker becomes 4.4%, which is smaller than the recommended upper limit of 8%. K E Y W O R D Sbuck-boost converter, ceramic capacitor, discontinuous current mode, electrolytic capacitor-less, LED driver 26

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Flicker-Free Electrolytic Capacitor-Less Universal Input Offline LED Driver With PFC

Cited by 63 publications

References 33 publications

Analysis of a Resonant AC‐AC LED Driver

Analysis of a Resonant AC‐AC LED Driver

A Review on Flicker-Free AC–DC LED Drivers for Single-Phase and Three-Phase AC Power Grids

Output Current Ripple Reduction of LED Driver Using Ceramic-Capacitor-Input Circuit and Buck-Boost Converter

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