摘要
原边反馈反激变换器因其体积小、效率高且能够实现隔离等特点在中小功率电源领域中使用十分广泛。针对传统的单模式控制方式反激变换器不能在全负载范围内做出合适的效率优化的缺点,采用多模式控制方法,提高变换器轻载效率。本文基于凌特公司的控制芯片LT8303,设计完成了一款5V/2W的多模式控制反激变换器。详细分析了该电路的工作原理,并给出关键参数设计原则。实验结果表明该反激变换器具有轻载效率高,负载调节性能好等优点。
Because of its small size,high efficiency and isolated,primary side regulation flyback converter is widely used in medium and small-sized power supply.To improve the efficiency of power supply,specially the efficiency in the light load,a multi-mode control adapted for the PSR flyback converter was designed in the thesis.The principle of the proposed converter is discussed in detail.The design method of key parameters is carefully depicted.Finally,the experimental results from a 5V/2W prototype designed by LT8303 are presented to confirm the operation,validity,and features of the proposed converter.
作者
刘天翔
倪超
谢君甫
LIU Tian-xiang;NI Chao;XIE Jun-fu(Leihua Electronic Technology Research Institute of AVIC,Wuxi 214063,China)
出处
《电子设计工程》
2019年第8期85-89,共5页
Electronic Design Engineering
