Copyrights©2014-2019     Guangzhou Sanmim Electronic Technology Co., Ltd.    All Rights Reserved   ICP:15080287

Links:AlibabaTaobao Mall  |  Corporate store

Contact:Mr. Yang


Mobile: (+86)18688873682




Address: Building D, No. 8 Microthink Tank Industrial Park, Xianke Road No.1, Xiutang Village, Huadong Town, Huadu District, Guangzhou510890


Whatsapp:0086 13751801082


Introduction for Ripple of Switching Power Supply Module

Introduction for Ripple of Switching Power Supply Module

Page view
Ripple:  The output of switching power supply module is not really constant. There is with periodic jitters of the output. 



The output of switching power supply module is not really constant. There is with periodic jitters of the output. These jitters look like water ripple, so it called ripple.  


Ripples can be voltage or current ripples.

Two parameters are usually used to describe the ripple.

Maximum ripple voltage: the peak of the ripple


Ripple coefficient : the ratio of the effective value of AC component to that of DC component




Causes for Ripple


2 places for the ripples of switching power supply module


Low-frequency ripple: The power supply rejection ratio is not perfect from the AC input cycle. When the input changes, the output will also change.


High-frequency ripple: From the switching period, the switching power supply does not output energy linearly and continuously, but transmits energy in packets, so there will be ripple corresponding to the switching period.


If it is a linear power supply module, there is with no switching ripple, only low-frequency ripple.