How to Make a Buck-Boost Converter with Continuous Current and Open Loop Design

Click For Summary

Discussion Overview

The discussion centers around the design and construction of a Buck-Boost converter, specifically focusing on the challenges faced in selecting components such as a MOSFET, load, capacitor, and inductor. The context is a homework assignment for a Design PE class, with an emphasis on open loop design and voltage control.

Discussion Character

  • Homework-related
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • One participant expresses uncertainty about how to begin the project, seeking guidance on calculations and component selection for the Buck-Boost converter.
  • Another participant suggests checking resources from National Semiconductor or Maxim for application and design information related to controllers.
  • A clarification is made regarding the term "open loop," with one participant asserting that controlling the output voltage with a potentiometer does not constitute an open loop design but rather an adjustable one.
  • There is a follow-up question about whether the original poster found useful application notes from the suggested websites.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the terminology used to describe the control method for the output voltage, indicating a disagreement on the definition of "open loop" versus "adjustable." The discussion remains unresolved regarding the initial steps for building the converter.

Contextual Notes

There are limitations in the discussion, including a lack of specific calculations or methodologies for component selection, and the potential misunderstanding of terminology related to control systems.

Frexter
Messages
2
Reaction score
0

Homework Statement


I have to make a Buck-Boost converter for my Design PE class but the problem is even though i have read about them i seriously don't know where to start. I have to make calculations and choose a mosfet, load, capacitor and an inductor but i don't know how.


Homework Equations





The Attempt at a Solution



I'm looking for a tutorial or a step-by-step guide on building a BBC. It's pretty basic actually not extremely complicated but i just need a nudge to the correct direction.
 
Physics news on Phys.org
Frexter said:

Homework Statement


I have to make a Buck-Boost converter for my Design PE class but the problem is even though i have read about them i seriously don't know where to start. I have to make calculations and choose a mosfet, load, capacitor and an inductor but i don't know how.


Homework Equations





The Attempt at a Solution



I'm looking for a tutorial or a step-by-step guide on building a BBC. It's pretty basic actually not extremely complicated but i just need a nudge to the correct direction.

Have you checked out the websites for National Semiconductor or Maxim? You will find a lot of useful application and design information there, since they make the ICs that you can use for controllers.

And what do you mean by "Open Loop" in the title of this thread? You will generally use feedback to stabilize the output voltage...
 
By open loop, i mean the output voltage can be controlled by a potansiometer.
 
Frexter said:
By open loop, i mean the output voltage can be controlled by a potansiometer.

Ah. That's not "open loop", that's "adjustable".

Were you able to find some useful application notes at those websites?
 

Similar threads

  • · Replies 9 ·
Replies
9
Views
887
  • · Replies 14 ·
Replies
14
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 32 ·
2
Replies
32
Views
6K
  • · Replies 13 ·
Replies
13
Views
4K
Replies
55
Views
8K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 10 ·
Replies
10
Views
3K