开关电源在突发模式和频率折返模式下磁性元件产生可听噪声的分析与比较

In this paper, it is theoretically shown and experimentally verified that operation of switch-mode power supplies in burst mode (BM) results in lower audible noise than operation in frequency-foldback mode (FFM). However, the selection of the switching frequency in a burst package can have a significant impact on the audible noise. In both BM and FFM, the audible noise can be reduced by decreasing...