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.

TI LM2596 Regulator Confusion

Status
Not open for further replies.

rmawatson

Newbie level 2
Joined
Jul 10, 2015
Messages
2
Helped
0
Reputation
0
Reaction score
0
Trophy points
1
Activity points
23
Hello,

I am confused about how buck regulator modules such as this one on ebay, work successfully with as much adjustment as they have. The datasheet is very specific about the inductor selection and the range of input/output voltage for a given inductor is much smaller than this module says it supports.

How is it that a fixed design such as this can work well, when input and output voltage can vary so much, and what is the side effect of the inductor and capactior value being fixed.

In addtion to this, the TI webpage for this device says

"Recommended alternative parts

LM43603 - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. Synchronous 36V, 3A Regulator - Higher efficiency, Low Quiescent Current, Smaller Solution Size"


Would this work well in a similar situation with fixed component values and a large input/output range?
 

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
48,408
Helped
14,251
Reputation
28,763
Reaction score
12,939
Trophy points
1,393
Location
Bochum, Germany
Activity points
280,133
I believe you didn't read the LM2596 datsheet thoroughly and still less understood the reasoning behind the suggested capacitor and inductor values.

The tables are based on a parameter "maximum input voltage" and "maximum input current". In case of doubt you'll use the largest inductor and capcitor value.

It's always allowed to use a larger inductor or capacitor, achieving lower current or voltage ripple. You pay with larger component size, and higher losses in case of the inductors.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top