Improved Synchronous Rectifier Driving Strategy for Primary-Side Regulated (PSR) Flyback Converter in Light-Load Mode
Improved Synchronous Rectifier Driving Strategy for Primary-Side Regulated (PSR) Flyback Converter in Light-Load Mode
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轻负载模式下初级侧调节 (PSR) 反激式转换器的改进同步整流器驱动策略
DOI：
10.1109/tpel.2014.2303094
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发表时间：
2014-02
影响因子：
6.7
通讯作者：
Shirong Liu
中科院分区：
文献类型：
--
作者：
Chen Zhao;Xiaogao Xie;Shirong Liu
在概念推导的基础上，针对DC-DC前端转换器和AC-DC PFC转换器的应用，提出了一种针对准谐振原边调节(QR-PSR)反激变流器的改进型同步整流(SR)驱动策略，以防止轻载/待机模式下的能量反向流动。展示并分析了三种不同的实现候选方案。该驱动策略对于具有输入电压前馈效应的实际设计是可编程的，有助于实现美国能源部(DoE)提出的在轻输出负载条件下低功耗的严格目标。搭建了两台60W(12V/5A)的同步整流QR-PSR反激式AC-DC功率因数校正电路样机和DC-DC前端功率因数校正电路样机，验证了该驱动策略的可行性。在实验室研制的AC-DC PFC转换器样机中，在轻负载模式下，整体转换效率提高了3%以上；在实验室研制的DC-DC前端转换器样机中，特别是在110Vac输入的情况下，节省了高达0.5W的轻载功率损耗。当所提出的SR驱动策略在实际设计中具有足够的裕度时，可以实现可靠的工作；但是，过大的设计裕度会降低平均转换效率。
Based on the concept derivation, this paper proposes an improved synchronous rectifier (SR) driving strategy focusing on the quasi-resonant primary-side regulation (QR-PSR) Flyback converter, for the applications of dc-dc front-end converter and ac-dc PFC converter both, to prevent reverse energy flowing in light-load/standby mode. Three different implementation candidates are exhibited and analyzed. This proposed driving strategy is programmable for the practical design with input voltage feedforward effect and helpful for achieving the rigorous target of low power loss under light output load condition presented by the U.S. Department of Energy (DoE). Two 60 W (12 V/5 A) lab-made prototypes of synchronous rectified QR-PSR Flyback ac-dc PFC converter and dc-dc front-end converter are built up, respectively, to verify the feasibility of this proposed driving strategy. In the lab-made prototype of ac-dc PFC converter, it improves the overall conversion efficiency more than 3% in light-load mode; in the lab-made prototype of dc-dc front-end converter, it saves the light load power loss up to 0.5 W, especially with 110 Vac input. Reliable operation is achieved when the proposed SR driving strategy is practically designed with enough margin; however, too large design margin could decrease the average conversion efficiency.
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DOI：
10.1109/41.402478
发表时间：
1995-08
期刊：
IEEE Trans. Ind. Electron.
影响因子：
--
作者：
M. Jovanovic;Michael T. Zhang;F. Lee
通讯作者：
M. Jovanovic;Michael T. Zhang;F. Lee
DOI：
10.1109/apec.2008.4522769
发表时间：
2008-05
期刊：
2008 Twenty-Third Annual IEEE Applied Power Electronics Conference and Exposition
影响因子：
--
作者：
D. Fu;Ya Liu;F. Lee;Ming Xu
通讯作者：
D. Fu;Ya Liu;F. Lee;Ming Xu
影响因子：
6.7
作者：
Junming Zhang;Jiawen Liao;Jianfeng Wang;Z. Qian
通讯作者：
Junming Zhang;Jiawen Liao;Jianfeng Wang;Z. Qian
影响因子：
6.7
作者：
T. Qian;Weizhang Song;B. Lehman
通讯作者：
T. Qian;Weizhang Song;B. Lehman
影响因子：
7.7
作者：
Jong-Jae Lee;Jung-Min Kwon;Eung-Ho Kim;W. Choi;B. Kwon
通讯作者：
Jong-Jae Lee;Jung-Min Kwon;Eung-Ho Kim;W. Choi;B. Kwon