Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic 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.

buck boost converter operation

Status
Not open for further replies.

mess123

Member level 5
Joined
Nov 30, 2008
Messages
90
Helped
3
Reputation
6
Reaction score
1
Trophy points
1,288
Activity points
1,821
Could anyone please tell me how does buck boost circuit operation helps automatically to step up or step down the input voltage to maintain the output voltage constant??

---------- Post added at 15:39 ---------- Previous post was at 15:15 ----------

Is there any range of duty cycle where the operation is buck and is then boost ??
 

grieblm

Member level 4
Joined
May 7, 2011
Messages
75
Helped
18
Reputation
36
Reaction score
18
Trophy points
1,308
Location
Georgetown, Canada
Activity points
1,734
The buck/boost converter changes mode based on the input voltage. If the input voltage > output voltage it operates in a buck mode; otherwise it is working in a boost mode. The change-over point is dependent on the buck/boost converter design. Perhaps you could tell us what part you are using?
 

leo_o2

Advanced Member level 4
Joined
Sep 3, 2004
Messages
1,324
Helped
277
Reputation
556
Reaction score
241
Trophy points
1,343
Location
China
Activity points
5,761
In one of Buck-boost, four switches are needed. It is smooth transient between step-down and step-up.
When D=50%, Vo=Vin.
Vo=Vin*D/(1-D)
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top