An electronic AC power system with buck PFC and linear regulator to drive and control the current of power LEDs

Fonseca, Zito Palhano da; Font, Carlos I.; Kaster, Mauricio dos Santos; Perín, Adriano; Nascimento, Claudinor Bitencourt

doi:10.1109/cobep.2011.6085189

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…Regarding the other mentioned classical converters, they do not share a common switch and output reference terminal. It means that the switch driver or any output voltage/current sensor must be isolated, thus leading to a high component count and increased cost [6]. Therefore, the SEPIC converter becomes an attractive option since it addresses this whole list of drawbacks.…”

Section: Introductionmentioning

confidence: 99%

“…Being the LEDs directly connected to the DC bus voltage means that their current also have high ripple, thus reducing their lifespan [9]. In order to reduce the LEDs current ripple a linear regulator is often required [6], [10]- [12]. However, for the losses in the regulator not being very high, it is necessary that the difference between the input and output voltages of the regulator remains as low as possible, preferably on the threshold of regulation.…”

Section: Introductionmentioning

confidence: 99%

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A Flicker-free Power Leds Driver Based on the Non-isolated Sepic Rectifier Using a Regenarative Snubber

Burgardt¹,

Agostini²,

Font³

et al. 2015

Eletrônica de Potência

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-This paper presents an AC electronic lighting system using a non-isolated SEPIC PFC rectifier to drive and control power LEDs currents. One energy regenerative snubber for reducing the converter switching losses and improve the system efficiency is proposed. To reduce ripple current in the LEDs array a linear current regulator is placed in the SEPIC's output terminals. In order to reduce the efficiency impairment, the conditions for achieving minimum energy loss in the current regulator are also detailed. The operation stages as well as the theoretical waveforms and main equations at steady state of the proposed SEPIC rectifier using a regenerative snubber are detailed. To verify the theoretical analysis carried out, experimental results of a prototype operating in 127 and 220 V for 35 LEDs / 42 W are also presented. In this paper, the point of minimum energy loss in the linear regulator is adjusted in open loop to validate the converter operation. 1

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Flicker-free Power Leds Driver Based on the Non-isolated Sepic Rectifier Using a Regenarative Snubber

Burgardt¹,

Agostini²,

Font³

et al. 2015

Eletrônica de Potência

View full text Add to dashboard Cite

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A SEPIC-energy-regenerative-snubber with linear current regulator for power LEDs

Burgardt

Agostini

Font

et al. 2014

2014 11th IEEE/IAS International Conference on Industry Applications

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This paper presents an AC electronic lighting system using a non-isolated SEPIC PFC rectifier to drive and control power LEDs currents. One energy regenerative snubber for reducing the converter switching losses and improve the system efficiency is proposed. To reduce ripple current in the LEDs array a linear current regulator is placed in the SEPIC's output terminals. In order to reduce the efficiency impairment, the conditions for achieving minimum energy loss in the current regulator are also detailed. The main equations of the proposed energy regenerative snubber as well as the experimental results of a prototype that feeds 35 LEDs / 42 W are presented. In this paper, the system operates with 127 Volts of input voltage and the point of minimum energy loss in the linear regulator is adjusted in open loop to validate the converter operation.

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On a Bidirectional Adapter With G2B Charging and B2X Emergency Discharging Functions

Liaw

2014

IEEE Trans. Ind. Electron.

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An electronic AC power system with buck PFC and linear regulator to drive and control the current of power LEDs

Cited by 3 publications

References 13 publications

A Flicker-free Power Leds Driver Based on the Non-isolated Sepic Rectifier Using a Regenarative Snubber

A Flicker-free Power Leds Driver Based on the Non-isolated Sepic Rectifier Using a Regenarative Snubber

A SEPIC-energy-regenerative-snubber with linear current regulator for power LEDs

On a Bidirectional Adapter With G2B Charging and B2X Emergency Discharging Functions

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