How to build a buck boost converter

A

alangth

New Member

• Feb 15, 2013

• #1

Hi~
I want to build a buck boost converter
but I can't find any reference to build it~
can anyone help me~

I try to search on ebay for this product

**broken link removed**
Does anyone have any buck boost circuit diagram~?

Need help urgently~ thanks~

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 15, 2013

• #2

Download the datasheets for the chips used in that example, and work from there.

 

A

alangth

New Member

• Feb 15, 2013

• #3

Dear Nigel Goodwin~

I want to know how to combine both converter~
I know about the example in datasheet just face problem in combine~
as i don't have the basic ~

 

Nigel Goodwin

Super Moderator

Most Helpful Member

• Feb 15, 2013

• #4

Order one from that web page them, they are cheap enough - then reverse engineer it

 

crutschow

Well-Known Member

Most Helpful Member

• Feb 15, 2013

• #5

Here's a design using a UC2577 in a buck-boost design.

If you want to know how the ebay circuit combined the two chips you will likely will have to buy one and reverse engineer it like Nigel stated.

 

ChrisP58

Well-Known Member

Most Helpful Member

• Feb 15, 2013

• #6

I can't be sure, but from looking at the picture I suspect that that is not really a single stage buck-boost, but just an integration of separate buck converter and boost converters.

As such, the efficiency will be poor since all the output power has to go through two conversions.

 

A

alangth

New Member

• Feb 17, 2013

• #7

OK~ many thanks guys~

 

W

waleed shah pk

New Member

• Apr 23, 2014

• #8

here is the circuit

 

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