关键词: 跨周期调制, 斜坡补偿, 电感电流最大值, 效率

Abstract:

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.

Key words: PSM;slope compensation;maximum inductor current;efficiency