18.5 ZVS Flyback-Converter ICs Optimizing USB Power Delivery for Fast-Charging Mobile Devices to Achieve 93.5% Efficiency

Chang, Wen-Hao; Lin, Kun-Yu; Lee, Chun-Ching; Lo, Li-Di; Lin, Jenn-Yu G.; Yang, Ta-Yung

doi:10.1109/isscc19947.2020.9062996

Cited by 5 publications

(1 citation statement)

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“…The flyback converter has the advantages of galvanic isolation, low cost, and small size, which makes it the most common topology in small‐ and medium‐power applications, such as power adapters and mobile equipment chargers [1]. With fast charge applications becoming a trend, the power of chargers is increasing [2]. Furthermore, as the output voltage of the charger remains constant, the increase of output current becomes the main solution for the power increase.…”

Section: Introductionmentioning

confidence: 99%

Novel synchronous rectification strategy for flyback converter in both DCM and CCM applications

Sun

Guo

Zhang

et al. 2022

IET Power Electronics

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In this paper, a novel flyback synchronous rectification (SR) strategy for both continuous conduction mode (CCM) and discontinuous conduction mode (DCM) is proposed. The hybrid mode is suitable for the wide input voltage range, and large load range, which can widen the application range. The proposed strategy can reduce the body diode conduction time in the turning‐on interval in both the DCM and CCM and eliminate the cross‐conduction between the primary switch and secondary switch that existed in the conventional CCM SR converter by adding several logic units. A 12‐V/3‐A output mixed‐mode flyback converter prototype is designed and fabricated to verify the strategy. Measurement results show that with the proposed SR strategy, the efficiency is improved by approximately 5.5% in CCM and 0.5% in DCM.

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Section: Introductionmentioning

confidence: 99%