Quasiresonant Control With a Dynamic Frequency Selector and Constant Current Startup Technique for 92% Peak Efficiency and 85% Light-Load Efficiency Flyback Converter

Kang, Yu-Chai; Chiu, Chaochang; Lin, Mong-Wei; Yeh, Chih-Pu; Lin, Jiunn-Yuan; Chen, Ke-Horng

doi:10.1109/tpel.2013.2263040

Cited by 29 publications

(8 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Conversores flyback também podem ser utilizados em modo de condução descontínuo (DCM), modo de condução contínuo (CCM) e modo de condução crítica (CRM) (Wi et al, 2018;Kang et al, 2014). Em geral, o projeto de controle linear aplicado ao conversoré implementado em torno de um ponto fixo de operação.…”

Section: Introductionunclassified

Investigação de Estratégias de Controle Clássico aplicadas a Conversores de Potência do tipo Flyback

Souza

Medeiros

Bessa

et al. 2020

Anais Do Congresso Brasileiro De Automática 2020

View full text Add to dashboard Cite

Recursos energéticos renováveis são soluções promissoras para uma futura crise energética global. Melhorar a eficiência da captação de energia e reduzir o custo de energia renovável são os principais objetivos para o desenvolvimento da tecnologia de eletrônica de potência. Para integrar os sistemas de geração e armazenamento de energia e regulação da tensão de saída, são utilizados os conversores CC-CC. Dentro desta topologia de conversores,destaca-se o conversor isolado do tipo flyback, o qual oferece isolação entre entrada e saída de conversão. Porém, o comportamento dinâmico destes conversores ocasiona efeitos não lineares no sistema, devido aos elementos de chaveamento. Neste âmbito, este trabalho realiza um estudo baseado na linearização em torno de um ponto de operação para regulação da tensão na saída de um conversor flyback fazendo uso de estratégias de controle clássico, objetivando mitigar efeitos de oscilações, garantindo a estabilidade do sistema para as especicações de desempenhodesejadas. As simulações foram realizadas para um conversor operando com tensão de entrada de 10 V, tensão de saída de 12 V, potência de 10 W e frequência de comutação de 2 kHz.

show abstract

Section: Introductionunclassified

Investigação de Estratégias de Controle Clássico aplicadas a Conversores de Potência do tipo Flyback

Souza

Medeiros

Bessa

et al. 2020

Anais Do Congresso Brasileiro De Automática 2020

View full text Add to dashboard Cite

show abstract

“…It changes the turn-on instant among valleys gradationally during several switching cycles under any transient situation. To achieve a high efficiency flyback converter with minimized external components, a dynamic frequency selector (DFS) technique is proposed in [29], which dynamically chooses one suitable valley voltage in the resonance to extend the switching period. In addition, valley switching with valley skip (VS) control is developed to reduce the turn-on switching loss under the light load condition.…”

Section: Introductionmentioning

confidence: 99%

Digital Control of a High-Voltage (2.5 kV) Bidirectional DC--DC Flyback Converter for Driving a Capacitive Incremental Actuator

Thummala

Maksimović

Zhang

et al. 2016

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…Therefore, a technique to achieve zero-voltage switching (ZVS) at the PS switch by auxiliary turn-on the SR is used in this article [11]. This technique achieves higher efficiency than the quasi-resonance (QR) flyback approach [7], [12], [13]. This article further proposes the switch control method using the pulse transformer to achieve ZVS without extra component and added cost.…”

mentioning

confidence: 99%

Highly Integrated ZVS Flyback Converter ICs With Pulse Transformer to Optimize USB Power Delivery for Fast-Charging Mobile Devices

Chang

Chen

et al. 2020

IEEE J. Solid-State Circuits

View full text Add to dashboard Cite

Flyback converter with USB power delivery is widely used for fast-charging mobile devices. However, conventional solutions have issues such as lower efficiency, higher cost, a large number of external components, and lower loop gain bandwidth. In this article, a high-efficiency zero-voltage switching (ZVS) flyback converter with primary-and secondary-side control ICs is proposed to solve the aforementioned issues with high integration level. The proposed control replaces optocoupler to achieve ZVS and secondary-side-regulation (SSR) by a pulse transformer. The ICs further integrate the USB power delivery (PD) controller and the constant voltage (CV)/constant current (CC) loop compensation to reduce external components. The proposed control and small-signal model are illustrated and verified by the experiment. The control ICs were fabricated in a 180-nm BCD process. The implemented 20-V/3-A/60-W USB PD flyback converter achieved 93.5% maximum efficiency using Si power switches. The feasibility of the proposed converter is verified by a thorough test of programmable power supply (PPS) with various CC/CV levels and load/line transients. Index Terms-Converter, constant voltage (CV)/constant current (CC), fast-charging, flyback converter, pulse transformer, USB power delivery (PD), zero-voltage switching (ZVS). I. INTRODUCTION U SB power delivery (PD) supporting up to 100 W (20 V/5 A) has become a popular standard for mobile devices' fast-charging solution [1]-[3]. An adapter with the USB-PD specification has the advantage of supplying various devices with a single converter. For example, the converter with the input from the grid can provide a 5-V dc output voltage for cellphone load and a 19-V dc output voltage for laptop computer load. Thus, the carrying adaptors and corresponding electronic trash can be reduced. Moreover, the extended specification of USB PD includes a programmable power supply (PPS) which is suitable for fast-charging mobile devices.

show abstract

Quasiresonant Control With a Dynamic Frequency Selector and Constant Current Startup Technique for 92% Peak Efficiency and 85% Light-Load Efficiency Flyback Converter

Cited by 29 publications

References 21 publications

Investigação de Estratégias de Controle Clássico aplicadas a Conversores de Potência do tipo Flyback

Investigação de Estratégias de Controle Clássico aplicadas a Conversores de Potência do tipo Flyback

Digital Control of a High-Voltage (2.5 kV) Bidirectional DC--DC Flyback Converter for Driving a Capacitive Incremental Actuator

Highly Integrated ZVS Flyback Converter ICs With Pulse Transformer to Optimize USB Power Delivery for Fast-Charging Mobile Devices

Contact Info

Product

Resources

About