Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing

Liu, Xueshan; Wan, Yuyang; Dong, Zheng; He, Mingzhi; Zhou, Qun; Tse, Chi K.

doi:10.1109/tpel.2019.2942488

Cited by 27 publications

(16 citation statements)

References 26 publications

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“…Therefore, the proposed power system includes a charger and a discharger, as shown in Figure 1. Since the proposed system operating in the charging condition belongs to a low-power-level application, it can use a basic converter as its charging converter, such as buck, boost, buck-boost, cuk, zeta, and sepic converters [7][8][9][10]. In one paper [7], the proposed converter uses cuk, zeta, or sepic converters operating in the critical conduction mode (CRM) to achieve zero-current or zero-voltage switching (ZCS or ZVS).…”

Section: Introductionmentioning

confidence: 99%

Zeta/Flyback Hybrid Converter for Solar Power Applications

Tseng

Fan

2022

Sustainability

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This paper presents a zeta/flyback hybrid converter with a PV array as its power source for an LED street light or digital signage application. When the PV array is used in a LED lighting system, it needs a battery charger and discharger. In order to increase the areas of application for different PV arrays, a zeta converter has been adopted as the battery charger. In addition, since a flyback converter has a simpler circuit, it is used as the battery discharger. Due to the leakage inductor of the transformer in the flyback converter, an active clamp circuit is used to recover the energy stored in leakage inductance. Zeta and flyback converters use switch integration techniques to form the proposed zeta/flyback hybrid converter. With this approach, the proposed system has less components, a lighter weight, a smaller size, and higher conversion efficiency. Finally, a prototype of the proposed hybrid converter with an output voltage of 12 V and output power of 50 W has been implemented to verify its feasibility. It is suitable for LED lighting system applications.

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Section: Introductionmentioning

confidence: 99%

Zeta/Flyback Hybrid Converter for Solar Power Applications

Tseng

Fan

2022

Sustainability

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“…In [31, 32] two new structures are introduced which are proper for high power applications. The structure introduced in [33] is proper for high power multi string LED driver when isolation is not necessary. In [34], very good structure is introduced which uses two switches and it is proper for medium power applications.…”

Section: Introductionmentioning

confidence: 99%

High performance single stage power factor correction circuit

Ghazali

Adib

2021

IET Power Electronics

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Here, a new single stage single switch soft switching PFC (power factor correction) converter is presented and analysed. The proposed converter combines buck AC‐DC converter and forward DC‐DC converter and applies an auxiliary circuit to eliminate input current dead angle. Furthermore, soft switching is attained and switching losses are eliminated resulting in high efficiency. Another merit of the proposed converter is the partial direct transmission of input power to the output that helps to improve efficiency. Experimental results are presented which justify the above mentioned points and show less than 5% THD in the nominal load. Comparison with other similar single stage PFC converters is performed and shows the proposed converter provides the lowest THD while high efficiency is attained.

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Section: Introductionmentioning

confidence: 99%

“…Various buck converter based topology is also found in literature [3,4,5,6,7,8,9]. Power factor improvement is the main concern of the researcher working in this area, some of the researcher suggested topologies with improved power factor [9,10]. Electrolytic Capacitor-Free topology is also available in literature which improves the lifetime of the driver [11,4,12,13,10,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

DC-DC converter Topologies for LED Driver Circuit: A Review

2020

International Journal of Circuits, Systems and Signal Processing

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It has been noticed that in commerciallighting, in terms of efficiency light-lamps based on lightemitting diodes(LEDs) are far better as compared to thosewhere traditional high-pressure sodium (HPS) lampswhich are still in use in major underdeveloped anddeveloping areas worldwide in specifically street lighting.The LED driver is an electrical device which controlspower flow to the single LED or a string of the LEDs orcontrols to the current flowing through the LEDs.Available conventional topologies for LED drivers haveseveral demerits such as flickering issues, high losses,luminance problems, low power factor, more number ofswitches etc. So, the need of the hour is to develop efficient,compact, long lifetime, high power factor and flicker-freeLED drivers. The LED have numerous advantages such ashigh luminous efficiency, life span and it has no mercuryin its composition. Therefore, recently researchers of thisarea has been setting a goal to utilize LED as a goodalternative to save electricity from major parts of thisplanet.In this paper, various topologies of LED drivers arepresented. This paper also portrays simulation of a LEDdriver which is based on the combination of the buckboost converter as power factor correction stage (PFC)and buck converter as dc-dc power conversion (PC) stage.Both the stages are integrated using single switch only so itis basically integrated LED driver circuit.

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Buck–Boost–Buck-Type Single-Switch Multistring Resonant LED Driver With High Power Factor and Passive Current Balancing

Cited by 27 publications

References 26 publications

Zeta/Flyback Hybrid Converter for Solar Power Applications

Zeta/Flyback Hybrid Converter for Solar Power Applications

High performance single stage power factor correction circuit

DC-DC converter Topologies for LED Driver Circuit: A Review

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