Losses analysis and low standby losses quasi-resonant flyback converter design

Huang, Guan-Chun; Liang, Tsorng–Juu; Chen, Kai–Hui

doi:10.1109/iscas.2012.6271718

Cited by 20 publications

(8 citation statements)

References 3 publications

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“…The bigger the voltage V DS is, the more obvious the loss is. A valley detection circuit is designed to detect the voltage valley of the drain and turns the power FET on at the valley so the conduction loss decreases and the efficiency increases [4] . As demonstrated in Fig.…”

Section: A Qr Mode Descriptionmentioning

confidence: 99%

Strategy and Implementation of Multi-mode Control in Switch-Mode Power Supply

Zhao¹,

Jiang²

2013

Proceedings of the 3rd International Conference on Electric and Electronics

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In order to reduce the standby power and increase the efficiency of the SMPS (Switch-Mode Power Supply), a multimode control strategy is presented and implemented in this paper. Three different modes are applied in the strategy and the optimization is achieved according to different load. The SMPS can work adaptively in different modes according to variable load. A chip is designed and fabricated on BCD 700 technology and a 12W (12V/1A) laboratory prototype is built in order to verify the proposed strategy. The experimental results have shown that the average efficiency of the proposed SMPS is 84% and the standby power consumption is 90mW, which both meet the requirements of the latest Energy Star specification with margin.

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Section: A Qr Mode Descriptionmentioning

confidence: 99%

Strategy and Implementation of Multi-mode Control in Switch-Mode Power Supply

Zhao¹,

Jiang²

2013

Proceedings of the 3rd International Conference on Electric and Electronics

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“…Therefore, QR control provides higher efficiency compared with fixed frequency controls. However, the QR control has its own limitations and drawbacks, such as preventing CCM at high load [10], lower efficiency at light load [11] and a wide range of operating frequencies, especially at both 220 and 110 V inputs [8]. The duty cycle D on is set by the turns ratio of the primary and secondary windings (N p and N s for the primary and secondary number of turns, respectively) and the converter input and output voltages (V in and V o ), as shown in (1).…”

Section: Introductionmentioning

confidence: 99%

“…The universally compatible flyback converter needs devices and components to withstand both high‐voltage stresses when using at HL and high‐current stress when using at LL, which results in difficulties in choosing suitable devices and components without compromise of the efficiency and cost. Nowadays, the need for higher efficiency is increasing with efficiency regulation policies, such as energy star and consumer electronics control (CEC), requiring a minimum efficiency of 84–87% [10, 11]. Typical mass production flyback converters are usually about 85% efficiency, particularly at HL operation.…”

Section: Introductionmentioning

confidence: 99%

Dual range flyback topology for high efficiency at dual voltage mains

Ezra

2020

IET Power Electronics

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This study introduces a dual range flyback converter, which overcomes low efficiency of the conventional flyback converter for universal mains voltages, i.e. 220 and 110 V AC mains. The topology comprises of reconfigurable primary power loops enabled by additional state switches. This combination allows the converter to run in parallel or series modes, enhancing the performance at 220 V AC high line or 110 V AC low line mains. It reduces the voltage rating of devices, supports two working points that operate in boundary conduction mode under fixed frequency and improves the utilisation of the devices. A 100 kHz, 60 W, 110 V AC or 220 V AC to 13 V DC converter has been designed and tested. The experimental results of the proposed converter have been compared against a conventional flyback converter. The results show a small improvement of performance at low voltage (110 V AC) and considerable performance improvement at high voltage (230 V AC): 0.6 and 2.3% efficiency improvement at full load, respectively.

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“…Endüstride birçok alanda yoğun bir şekilde kullanılan geri dönüşlü (Flyback) DC-DC dönüştürücü devresinin en önemli avantajlarından biri, giriş ve çıkış gerilimleri arasında elektriksel izolasyonun olmasıdır. Geri dönüşlü DC-DC dönüştürücü devresi diğer izoleli DC-DC dönüştürücü türlerine göre yapısının basit olması, maliyetinin düşük olması gibi avantajlarından dolayı daha çok tercih edilmektedir [3][4][5][6]. Bu avantajların yanında transformatör kullanımındaki sınırlamalar nedeniyle düşük güçlü uygulamalarda kullanılır.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Geri Dönüşlü DC-DC Dönüştürücünün Genelleştirilmiş Düğüm Denklemleri ile Analizi

Köseni¹,

Yıldız²

2018

Journal of Polytechnic

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Bu çalışmada, güç elektroniği devrelerinde yaygın olarak kullanılan geri dönüşlü (Flyback) DC-DC dönüştürücü devresinin analizi için etkili bir yöntem ileri sürülmüştür. Yöntemin etkinliği, dönüştürücü içerisindeki temel elemanların uygun şekilde modellenmesinden kaynaklanmaktadır. Dönüştürücü devresinin en temel parçası olan transformatör bağımlı kaynaklarla, anahtarlama elemanları ise iki değerli eleman yaklaşımı ile modellenmiştir. Anahtarlama elemanlarının konumlarına göre eşdeğer devredeki değişimler incelenmiştir. Analize temel oluşturan sistem denklemlerinin elde edilmesinde, genelleştirilmiş düğüm yöntemi kullanılmıştır. Sayısal sonuçlar, kalıcı hal bölgesindeki geleneksel analitik sonuçlarla karşılaştırılarak, ileri sürülen yöntemin üstünlüğü gösterilmiştir.

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Losses analysis and low standby losses quasi-resonant flyback converter design

Cited by 20 publications

References 3 publications

Strategy and Implementation of Multi-mode Control in Switch-Mode Power Supply

Strategy and Implementation of Multi-mode Control in Switch-Mode Power Supply

Dual range flyback topology for high efficiency at dual voltage mains

Geri Dönüşlü DC-DC Dönüştürücünün Genelleştirilmiş Düğüm Denklemleri ile Analizi

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