Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

Ringing effect in 5V supply

Status
Not open for further replies.
J

jay1691

Member level 2
Joined
Jul 22, 2014
Messages
47
Helped
1
Reputation
2
Reaction score
1
Trophy points
8
Activity points
345
Hello all,

As i have made 5V output from 24V input using LM25085MY/NOPB Buck Switching Controller.

I got Ringing effect on output of the 5V.
Here i have attached Image of that.
Can i suppress that effect using ferrite bead ?
if yes then how can i select that bead ?
que3.JPG
 

you can use 0.3E/1A ferriet bead, with 10uf & 0.1uf capacitor at both ends of bead and ground the another terminal of capacitor. this works fine for me.
 
Hi kelvinmanoj

How did you selected parameters of the bead ?
Have you simulate this in any software or anything else ?
Please give me method or reason behind this particular values of cap and bead.
 

can u take this in larger time scale(ex 10us/div). whether this ringing is periodic? Need to see your schematic/layout. See the control loop stability
 
Dear malli_1729

Yes ringing is periodic and i have used schematic which is suggested by webench of TI.Even i have used same part number.

here i attached that schematic. Sorry if it is not clearly visible.
**broken link removed**
 

attachment is invalid. With what frequency this ripple is periodic?
 
Hi ,
here i am reattaching the schematic.que3_rep.JPG
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top