带跨周期调制的斜坡补偿电路  

A Slope Compensation Circuit with Pulse Skipping Modulation

作　　者：欧健[1] 黄冲[1] 袁政[1] 薛超耀[1] 

机构地区：[1]西安电子科技大学电路CAD研究所,陕西西安710071

出　　处：《电子科技》2013年第8期113-115,共3页Electronic Science and Technology

摘　　要：提出一种带跨周期调制(PSM)的斜坡补偿电路,既能实现斜坡补偿、维持系统稳定,同时电感电流最大值和带载能力不受斜坡补偿的影响,轻载时也能实现PSM控制,使输出电压稳定,并且提高了效率。与一般PSM设计电路相比,该电路设计简单、易于实现。仿真结果表明,在15%～90%的占空比范围内,电感电流最大值变化量微小,PSM控制在轻载时大幅提高了转换器的效率。A slope compensation circuit with pulse skipping modulation（PSM） is proposed in this paper.The proposed structure not only achieves slope compensation which maintains the system stability without affecting the maximum inductor current and load capability,but also does PSM which stabilizes the output voltage and improves efficiency in light load.Compared with common PSM circuits,the proposed one is easy to design and implement.Simulation results show that the variation of maximum inductor current is small with the duty cycle ranging from 15% to 90% and PSM greatly improves efficiency of the converter in light load.

关 键 词：跨周期调制 斜坡补偿 电感电流最大值 效率 

分 类 号：TN432[电子电信—微电子学与固体电子学]