Bridgeless Buck-Boost PFC Rectifier with Positive Output Voltage

Hwu, K. I.; Tai, Yu-Kun; He, Yuping

doi:10.3390/app9173483

Cited by 3 publications

(4 citation statements)

References 16 publications

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“…In the following, the narrow bandwidth systems have been analyzed. In detail, a huge number of conventional LED drivers are widely discussed in literature, such as buck [24][25][26], buck-boost [27], SEPIC [28,29], flyback [30,31], half-bridge [32][33][34] and push-pull converters [35,36]. Furthermore, PFC can be achieved with valley-fill circuits [37].…”

Section: Switching Led Drivermentioning

confidence: 99%

Analysis of the Input Current Distortion and Guidelines for Designing High Power Factor Quasi-Resonant Flyback LED Drivers

et al. 2020

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Nowadays, LED lamps have become a widespread solution in different lighting systems due to their high brightness, efficiency, long lifespan, high reliability and environmental friendliness. The choice of a proper LED driver circuit plays an important role, especially in terms of power quality. In fact, the driver controls its own input current in addition to the LED output current, thus it must guarantee a high power factor. Among the various LED drivers available on the market, the quasi-resonant (QR) flyback topology shows interesting benefits. This paper aims at investigating and analyzing the different issues related to the input current distortion in a QR flyback LED driver. Several effects, such as the distortion caused by the ringing current, crossover distortion due to transformer leakage inductance and crossover distortion due to the input storage capacitor have been experimentally reported. These effects, not previously studied for a high power factor (Hi-PF) QR flyback, have been analyzed in depth. Finally, some practical design guidelines for a Hi-PF QR flyback driver for LED applications are provided.

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Section: Switching Led Drivermentioning

confidence: 99%

Analysis of the Input Current Distortion and Guidelines for Designing High Power Factor Quasi-Resonant Flyback LED Drivers

et al. 2020

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“…In view of this, if the loss of the bridge rectifier can be decreased, the overall efficiency of the circuit can be improved. Therefore, bridgeless active PFC rectifiers are presented [35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

“…As is generally acknowledged, the PFC control methods can be roughly categorized into the following four types: (1) peak current mode control [7]; (2) average current mode control [8,39]; (3) critical mode control [9,40]; (4) voltage-follower control [36].…”

Section: Introductionmentioning

confidence: 99%

Single-Stage Step-Down Power Factor Corrector without Full-Bridge Rectifier

Hwu,

Shieh,

2024

Applied Sciences

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In this paper, a single-stage step-down power factor corrector without a full-bridge rectifier is developed, which is designed to operate in discontinuous conduction mode (DCM). In terms of control, the DCM has the advantages of simple control and easy realization, no slope compensation, zero current switching, and no diode reverse current. By sampling the output voltage and using the voltage-follower control to generate the necessary control force to drive the power switch, not only can the output voltage be stabilized at the desired value, but also the input current can be, as much as possible, in the form of a sinusoidal waveform and can follow the phase of the input voltage. Moreover, the harmonic distortion meets the requirements of the IEC6100-3-2 Class D harmonics standard, and, thus, the proposed rectifier is appropriate for the computer, computer monitor, and television receiver. Eventually, by means of mathematical deductions, simulations by PSIM version 9.1, and experimental results, the feasibility and effectiveness of the proposed circuit can be verified.

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“…The Boost topology itself has a variety of shapes, one of which is the bridgeless topology. Bridgeless topology has a fairly high complexity on the controller side and a poor EMI impact [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

Implementation of Power Factor Correction using Asynchronous Boost Converter on Single Phase Full-Bridge Diode

Saputra,

Ridzki,

Wiwaha

et al. 2023

jeeccis

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In various industrial applications, the use of a power supply that uses a conventional diode single-phase rectifier topology results in high harmonic values in the electricity distribution system. One of the real impacts of this harmonic value is the heating of the electric power system equipment and power losses. High rms current values due to harmonics often cause problems in protection settings in addition to efficiency problems. The percentage value between the total harmonic component and the fundamental component is called THD (Total Harmonic Distortions). Therefore, in this study an asynchronous dc-dc boost converter is connected to the output side of a single-phase diode rectifier which is capable of improving power factor and low harmonics. So that a THD value of less than 15%, PF (Power Factor) = 0.92-1 and a sinusoidal input current can be obtained. The implementation results show that the PFC (Power Factor Correction) method can work well on single-phase diode rectifiers.

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Bridgeless Buck-Boost PFC Rectifier with Positive Output Voltage

Cited by 3 publications

References 16 publications

Analysis of the Input Current Distortion and Guidelines for Designing High Power Factor Quasi-Resonant Flyback LED Drivers

Analysis of the Input Current Distortion and Guidelines for Designing High Power Factor Quasi-Resonant Flyback LED Drivers

Single-Stage Step-Down Power Factor Corrector without Full-Bridge Rectifier

Implementation of Power Factor Correction using Asynchronous Boost Converter on Single Phase Full-Bridge Diode

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