×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

SEPIC converter design

SEPIC converter design

SEPIC converter design

(OP)
Hello,

i would like to design a SEPIC conveerter with input voltage ranging from 3Volts to 19 Volts . On its output will be connected three DC-DC converters ( 1 boost and 2 buck converters , their image is attached) and the output voltage of the SEPIC should be araound 8.4V.Could you help me with the design ?

Thank you.

RE: SEPIC converter design

What's stopping you from using one of the myriad of available chips and following their datasheets? Unless you're truly trying to do something different, the datasheets have pretty much everything you need to know to build up a basic converter. The fact that you're hooking up multiple converters the the output of the SEPIC only matters in terms of how much input capacitance they have (i.e., how much output capacitance the SEPIC sees).

Dan - Owner
http://www.Hi-TecDesigns.com

RE: SEPIC converter design

(OP)
My first try is this circuit :

But my circuit presents a strange response.
For pw =4.8u the response on the output is this (about 6.5V):

and the response for greater pw(e.g. 5u) is like this :

Both far away from ~8.4V.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close