High power factor Flyback converter for LED driver with Boundary Conduction Mode control

Chern, Tzuen-Lih; Liu, Li-Hsiang; Huang, Chun-Hsi; Chern, Yu-Lun; Kuang, Jao-Hwa

doi:10.1109/iciea.2010.5516684

Cited by 19 publications

(3 citation statements)

References 9 publications

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“…By equating the required gain (7) to the voltage gain (6), it is possible to find how the normalized switching frequency varies along the phase angle θ of a line half cycle, as illustrated in the plot of Figure 9.…”

Section: R2mentioning

confidence: 99%

“…In this case, an isolated PFC might enable a single-stage architecture (see Figure 3) with a substantial cost saving. Flyback-based isolated PFCs are a good choice up to 50-60 W: they are often used in lighting equipment [4][5][6][7]. For higher power levels, though the literature presents plenty of different solutions [8], none have become an industry standard like the flyback PFC.…”

Section: Introductionmentioning

confidence: 99%

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LLC Resonant Converters as Isolated Power Factor Corrector Pre-Regulators—Analysis and Performance Evaluation

Sucameli,

Adragna

2023

Energies

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The power supply of many applications running off the power line is made up of an isolated dc-dc converter powered by a front-end power factor corrector (PFC) stage. The PFC stage ensures compliance with the electromagnetic compatibility regulations but does not usually provide safety isolation since it is typically implemented with a boost converter. Lately, the increase in multi-output power supplies, especially in lighting and USB Power Delivery applications, has raised the need for an isolated PFC at power levels where currently there is not an industry standard solution. This isolated PFC is intended to power one or more non-isolated post-regulators to enable a substantial simplification of the overall architecture and a cost reduction. The usage of an LLC resonant converter as an isolated PFC has been considered and demonstrated only quite recently, raising the industry’s attention due to the favorable converter’s characteristics that have led to its success as a dc-dc converter. This paper provides two significant contributions. Firstly, it provides a quantitative assessment of the difference in the results obtained by designing an LLC-based PFC converter based on the first harmonic approximation analysis or the time-domain analysis by applying them to the design of the same converter. Secondly, it demonstrates that designing an LLC-based PFC converter to work also in the above-resonance region optimizes its performance by reducing the (magnetizing) reactive current in the resonant tank and, therefore, the rms currents on both the input and the output side and the related power loss.

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Section: R2mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

LLC Resonant Converters as Isolated Power Factor Corrector Pre-Regulators—Analysis and Performance Evaluation

Sucameli,

Adragna

2023

Energies

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“…By using a boost converter operating in pseudo-CCM, an additional degree of control freedom is achieved to realise PFC control [21]. The fly-back converter with BCM control for LED lighting application is also discussed in the literature [22]. An FPGA based dimmable AC LED driver is implemented without DC link capacitor with increased life cycle [23].…”

Section: Introductionmentioning

confidence: 99%

Constant on time controlled zero voltage switching electronic ballast with power quality improvement

Shrivastava

Singh

2015

IET Power Electronics

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This study deals with the design, modelling and implementation of unity power factor (UPF) boundary conduction mode (BCM)-based electronic ballast for a T8, 36 W fluorescent lamp. In low power applications, BCMbased boost converter is widely used because of the low inductor value, however, because of zero crossover distortion, achieving a total harmonic distortion of <10% is difficult for universal AC mains. In proposed electronic ballast, UPF has been achieved at universal AC mains by using a boost power factor corrected converter operating in BCM with constant on time control. The achieved constant DC-link voltage is converted into high frequency AC voltage using a quasi-half bridge series resonant inverter to initiate the discharge and also to drive the fluorescent lamp with constant current. The modelling and simulation of the proposed topology have been performed using sim power system toolboxes in MATLAB-Simulink environment. The switching losses have been reduced by achieving zero voltage switching at an operating switching frequency of 46 kHz. Different evaluated parameters have been found as per the international standard IEC61000-3-2 of class C regulations.

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Two-Stage System of CRM PFC Converter and LLC Resonant Converter to Reduce Frequency Interference in Integrated Transformers

Lee,

Shin,

Byeon

2024

J. Electr. Eng. Technol.

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High power factor Flyback converter for LED driver with Boundary Conduction Mode control

Cited by 19 publications

References 9 publications

LLC Resonant Converters as Isolated Power Factor Corrector Pre-Regulators—Analysis and Performance Evaluation

LLC Resonant Converters as Isolated Power Factor Corrector Pre-Regulators—Analysis and Performance Evaluation

Constant on time controlled zero voltage switching electronic ballast with power quality improvement

Two-Stage System of CRM PFC Converter and LLC Resonant Converter to Reduce Frequency Interference in Integrated Transformers

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