Design of Boost-Flyback Single-Stage PFC converter for LED power supply without electrolytic capacitor for energy-storage

Zhang, Chao; Yang, Xu; Xu, Ming; Chen, Qiaoliang; Wang, Zhaoan

doi:10.1109/ipemc.2009.5157659

Cited by 26 publications

(4 citation statements)

References 10 publications

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“…In addition to many dc-dc converters, as a unique topology, flyback converter and its variations are commonly used in T3(e) LED drivers. In [110], a flyback driver with C B at primary side is proposed as shown in Fig. 18(1).…”

Section: ) Type 3 -Ac-supplied Single-stage Driver Systemsmentioning

confidence: 99%

LED Systems Applications and LED Driver Topologies: A Review

et al. 2023

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High-power light-emitting diodes (LEDs) and high-brightness LEDs have revolutionized the lighting industry. The availability of cost-effective LEDs with high luminous flux, efficacy, and reliability has expanded their application to replace incandescent and fluorescent light sources. They have also enabled many new applications that were considered infeasible before, due to the inherent limitations of traditional sources of light. This survey provides a comprehensive overview of ac-and dc-supplied LED lighting systems and their applications, corresponding specifications and their similarities to/differences from regular power supplies. Restrictions imposed by LEDs characteristics, safety considerations, and dimmers are discussed. Also, LED driving approaches are categorized and their suitability for different applications is provided.

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Section: ) Type 3 -Ac-supplied Single-stage Driver Systemsmentioning

confidence: 99%

LED Systems Applications and LED Driver Topologies: A Review

et al. 2023

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“…The coupled-inductor primary side ripple current is given by V dc , L 1 , and duty cycle d are calculated using (10), (12), and (13) respectively.…”

Section: Analysis and Implementationmentioning

confidence: 99%

“…Unfortunately, the lifetime of the electrolytic capacitor is much shorter than that of the LED. In order to match the lifetime of the LED driver to that of the LED, several works have been presented to eliminate the electrolytic capacitors in the LED power circuit [12]- [14]. Some of these solutions need to employ more components that result in a relatively large driver circuit for LED.…”

Section: Introductionmentioning

confidence: 99%

A new high power factor, soft-switched LED driver without electrolytic capacitors

Lam

Jain

2013

2013 Twenty-Eighth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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A novel high power factor, soft-switched Light Emitting Diode (LED) driver without electrolytic capacitors is proposed in this paper.Conventional electrolytic capacitors used in LED drivers as the energy storage element have relatively short lifespan and affect the lifetime of the entire LED lighting system. In the proposed design, coupled inductors are used to provide power factor correction (PFC) and to provide part of the required energy with the DC-link capacitor to the output. As a result, low ripple output current is still achieved even when the size of the DC-link capacitor is reduced, which allows the film capacitor to be used to replace the conventional unreliable electrolytic capacitor. At the same time, high input power factor is also achieved. The operating principles and theoretical analysis of the proposed circuit will be described in this paper. An experimental prototype is built and tested in the laboratory. All the experimental results are provided to support the merits of the proposed work.

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“…Small capacitance is utilized with large voltage ripple for energy storage instead of large capacitance with small voltage ripple. In [12] and [13], a single-stage Boost-Flyback PFC converter with a series connected capacitor is proposed. The input energy is all transferred to the auxiliary capacitor through Boost, and then all energy stored in auxiliary capacitor is delivered to output through Flyback.…”

Section: Introductionmentioning

confidence: 99%

A single-stage electrolytic capacitor-less AC/DC LED driver

Zhang

Jin

2014

2014 International Power Electronics and Application Conference and Exposition

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Traditional LED drivers generally use electrolytic capacitor as the storage element which will restrict the lifetime and power density of drivers. In this paper, an electrolytic capacitor-less LED driver which pluses an auxiliary winding in the transformer and an additional full-bridge circuit to Flyback converter is proposed. It not only eliminates the electrolytic capacitor to extend the lifetime, but also achieves high input power factor and almost constant output current for LED load. The operational principle, detailed design of the main circuit, and control strategy are presented in this paper. A prototype with 48V/0.7A output is constructed and tested to verify the effectiveness of the electrolytic capacitor-less LED driver. Keywords-LED driver; power factor correction; electrolytic capacitor-free; constant output current; the large voltage ripple across the capacitor

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Design of Boost-Flyback Single-Stage PFC converter for LED power supply without electrolytic capacitor for energy-storage

Cited by 26 publications

References 10 publications

LED Systems Applications and LED Driver Topologies: A Review

LED Systems Applications and LED Driver Topologies: A Review

A new high power factor, soft-switched LED driver without electrolytic capacitors

A single-stage electrolytic capacitor-less AC/DC LED driver

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