Comparison between Quasi-Resonant and Active Clamp Flyback topologies for GaN-based 65W Wall Charger Application

Dey, Saikat; Ray, Mani Bhushan; Soni, Harshit; Ghosh, Rajesh; Shah, Manish

doi:10.1109/apec42165.2021.9487353

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…Both chargers have passed the EU CoC Tier 2 standard on average efficiency with margins (2.5% and 3.3%, respectively). We can also see the proposed dual-USB-C charger has almost the same uncased volume as the singe-USB-C design in [2], due to the elimination of buck converters especially the inductors.…”

Section: E Comparison and Discussionmentioning

confidence: 75%

“…This wide output voltage range, together with the universal input range (90 -264 Vac wide) requirement, poses design challenges on the USB-PD chargers. This has been addressed by adopting typologies such as quasiresonant or active clamp flyback [2] [3], current-source resonant converter [4], cascaded switched-capacitor converter [5], and two-stage architecture [6], as well as advanced controls [7] and [8]. Power density can also be improved by shrinking the double-line-frequency dependent bulk capacitor by using a half-bridge series-stacked buffer [6] or a self-driven thyristor [9].…”

Section: Introductionmentioning

confidence: 99%

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Implementation of Time Division Multiplexing With Commercial Flyback Controller for Multi-Outputs USB Power Delivery Charger

Xue

Tian

Cui

2022

IEEE Open J. Power Electron.

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Universal serial bus power delivery (USB-PD) chargers are more attractive to consumers with multiple output ports where more devices can be charged simultaneously. Existing multiple-port charger designs take multi-stage approaches, which increases power loss, charger size, and cost. This paper addresses this issue by presenting a time-division multiplexing (TDM) quasi-resonant (QR) flyback converter that eliminates the buck converter stages with simple and commercial analog implementations without the need of microprocessors. The circuit operation and practical design considerations are discussed in detail. An universal AC input, dual-USB-C GaN prototype validates the concept, while demonstrating USB-PD compliant operation, passed conducted EMI, and superior efficiency which passes the most stringent efficiency standards with margin where the benchmark GaN charger fails. Thanks to the elimination of buck stages, the proposed dual-USB-C charger achieves 1.9W/cm 3 uncased power density, close to that of single-USB-C charger.

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Section: E Comparison and Discussionmentioning

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Implementation of Time Division Multiplexing With Commercial Flyback Controller for Multi-Outputs USB Power Delivery Charger

Xue

Tian

Cui

2022

IEEE Open J. Power Electron.

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Compact Quasi-reasonant Flyback Synchronous Rectifier Converter and Control Method

Wei,

Feng,

2024

2024 Photonics &Amp; Electromagnetics Research Symposium (PIERS)

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Performance Comparison of Silicon- and Gallium-Nitride-Based MOSFETs for a Power-Efficient, DC-to-DC Flyback Converter

et al. 2022

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Gallium Nitride (GaN)-based devices offer many advantages over conventional electronic devices, such as lower input/output capacitances, a higher switching speed, and a compact size, resulting in higher-density power outputs and reduced switching losses. This research investigates the power and switching efficiency of GaN-based FET in an active-clamp, DC-to-DC flyback converter for step-down application (24 V to 7 V) and compares it with silicon (Si)- based devices in the same circuit topology. The operation is analyzed under various input conditions and output loads such as R, RC, RL, and RLC. The proposed topology can achieve a maximum power-conversion efficiency of 99.6% and can operate at higher frequency values above 1 MHz. The presented GaN-based flyback model can replace conventional Si-based switches in power applications which require high power-efficiency and switching speed in a compact device.

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Comparison between Quasi-Resonant and Active Clamp Flyback topologies for GaN-based 65W Wall Charger Application

Cited by 4 publications

References 10 publications

Implementation of Time Division Multiplexing With Commercial Flyback Controller for Multi-Outputs USB Power Delivery Charger

Implementation of Time Division Multiplexing With Commercial Flyback Controller for Multi-Outputs USB Power Delivery Charger

Compact Quasi-reasonant Flyback Synchronous Rectifier Converter and Control Method

Performance Comparison of Silicon- and Gallium-Nitride-Based MOSFETs for a Power-Efficient, DC-to-DC Flyback Converter

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