A Single-Stage LED Driver Based on SEPIC and <i>LLC</i> Circuits

Wang, Yijie; Qi, Na; Guan, Yueshi; Cecati, Carlo; Xu, Dianguo

doi:10.1109/tie.2016.2613921

Cited by 67 publications

(24 citation statements)

References 25 publications

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“…Due to its small size, long lighting life, low energy losses, environmental-friendliness, high adjustability, and wide applicability, LED lighting has been recognized as the most promising lighting solution [26][27] . However, LED drivers based on uncontrollable rectifier bridges have various defects, leading to energy losses, and EMI and harmonic pollution [28] .…”

Section: Llc Resonant Converter For Led Light Drivermentioning

confidence: 99%

LLC resonant converter topologies and industrial applications — A review

Zeng

Zhang

et al. 2020

Chin. J. Electr. Eng.

119

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Owing to the advantages of high efficiency, high energy density, electrical isolation, low electromagnetic interference (EMI) and harmonic pollution, magnetic integration, wide output ranges, low voltage stress, and high operation frequency, the LLC resonant converters are widely used in various sectors of the electronics-based industries. The history and development of the LLC resonant converters are presented, their advantages are analyzed, three of the most popular LLC resonant converter topologies with detailed assessments of their strengths and drawbacks are elaborated. Furthermore, an important piece of research on the industrial applications of the LLC resonant converters is conducted, mainly including electric vehicle (EV) charging, photovoltaic systems, and light emitting diode (LED) lighting drivers and liquid crystal display (LCD) TV power supplies. Finally, the future evolution of the LLC resonant converter technology is discussed.

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Section: Llc Resonant Converter For Led Light Drivermentioning

confidence: 99%

LLC resonant converter topologies and industrial applications — A review

Zeng

Zhang

et al. 2020

Chin. J. Electr. Eng.

119

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“…The proposed modified SEPIC enables the use of lower voltage rated semiconductors compared to other single-switch buck-boost derived topologies with a resulting performance comparable to the boost topology [2]- [3]. High static gain DC-DC converters are nowadays an important research focus due to the crescent demand of this technology for some applications as renewable energy sources, fuel-cells etc.…”

Section: Introductionmentioning

confidence: 99%

Non-Dissipative Snubber Circuit Based SEPIC Converter for High Static Gain Applications

Singh*,

Sahay

2020

IJRTE

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In this paper different non-dissipative snubber circuits in which RCD snubber circuit, CD snubber circuit, LCD snubber circuit and proposed LCD snubber circuit are implemented in SEPIC converter to obtain high static gain. The snubber circuit is used for the protection of the power semiconductor devices. The requirement of high static gain is necessary in different applications of dc-dc converters, so that efficient operation of the system can be obtained. The basic idea of the snubber circuit used in this paper is to reduce the turn-on and turn-off losses at the time of switching processes. For this purpose, inductor and capacitor combination is required so that during turn-on process, sudden change in current through semiconductor device which is used as a switch, can be reduced. Similarly, during turn-off process, sudden change in voltage across switch can be minimized. Here, different snubber circuit based SEPIC converters are analyzed with the help of MATLAB simulink and results of output voltages and currents are obtained. The results are summarized which clearly shows that the proposed SEPIC converter has high static gain in comparison of the others topologies. Hence non-dissipative snubber circuit based SEPIC converter provides high efficiency than the other modifications in SEPIC converter.

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“…The inductor-inductor-capacitor (LLC) circuit is one of the most practical DC-DC resonant converters. It successfully overcomes the light-load issues the series/parallel inductorcapacitor (LC) circuits suffer from and presents outstanding performances, such as low power losses and low electromagnetic interference [6][7][8][9][10][11][12]. Some researchers have attempted to develop wide-range high-efficiency LLC resonant converters by optimising the circuit's parameters.…”

Section: Introductionmentioning

confidence: 99%

High‐efficiency topology‐morphing multi‐resonant DC–DC converter with wide voltage gain range for small‐scale wind generation applications

Han

Wang

Yang

et al. 2019

IET Power Electronics

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In this study, a high-efficiency topology-morphing multi-resonant DC-DC converter is proposed. The converter employs two auxiliary switches to control the equivalent resonant tank, and thus exhibits adaptive resonant characteristics for diverse situations. The dual-transformer MRC structure is applied when high-voltage gain is required, while a five-element MRC operates at the rated state for high-conversion efficiency. Besides, good protection for the over-current issue is guaranteed. Also, beneficial from the topology-morphing technology, the operating frequency range is very narrow and near every mode's high-efficiency region. Therefore, the proposed converter has an expanded voltage gain range and maintains high-efficiency throughout. These features make it well suitable for small-scale wind generation applications. Finally, a 500 W prototype is fabricated in the laboratory to test the performances. The input voltage varies from 80 to 600 V and the output voltage is constant at 400 V. The efficiency remains high (>96.5%) among the entire voltage gain range and the peak value reaches 97.93%.

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A Single-Stage LED Driver Based on SEPIC and LLC Circuits

Cited by 67 publications

References 25 publications

LLC resonant converter topologies and industrial applications — A review

LLC resonant converter topologies and industrial applications — A review

Non-Dissipative Snubber Circuit Based SEPIC Converter for High Static Gain Applications

High‐efficiency topology‐morphing multi‐resonant DC–DC converter with wide voltage gain range for small‐scale wind generation applications

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