DC to DC converters design - Page 1
Forum section: electronics / general

author: exodia
author_rank: Contributor
timestamp: September 02, 2010, 05:31:30 am
content: Hello DaveI would love to see an analysis on topologies and calculation for variousDC to DC converters. Almost everyone know the basic topologies for buck boost etc but do they know how to calculate all the equations needed for L, C ripple, bla,bla,bla? Maybe some rules of thumb will help lot of people that want to design a new DC to DC converters in the future. The topic of the blog will be big a think but my opinion is that it's worth itthanks

author: EEVblog
author_rank: Unknown
timestamp: September 02, 2010, 05:53:50 am
content: The next blog will be a DC-DC converter one, but it's basically just a walk-through of using one particular chip.Dave.

author: exodia
author_rank: Contributor
timestamp: September 02, 2010, 12:48:35 pm
content: Nice DaveAre you thinking of making a blog for calculating the values of components for discrete DC to DC converters. That would be very educational i think

author: TopherTheME
author_rank: Regular Contributor
timestamp: September 03, 2010, 04:37:21 pm
content: +1 for the DC-DC converter tutorial. I'm currently working on a solar MPPC, the heart of which is a buck converter, and I'm having a hell of a time trying to wrap my head around everything.

author: EEVblog
author_rank: Unknown
timestamp: September 04, 2010, 01:27:09 am
content: The problem with DC-DC converters is that there are so many variations in the design aspects of them.I can do a tutorial on the topologies, but guaranteed that any calculations I make won't be suitable for the design you are working on!Throw in the thousands of different advanced and exotic converter chips available, it's just endless.The next video uses the MC34063, about as jelly bean a DC-0DC converter as you can get.Dave.

author: exodia
author_rank: Contributor
timestamp: September 09, 2010, 11:28:19 am
content: Yea calculations are a hell of a time for DC 2 DC converters. I can't find any decent tutorial for step by step calculations of various topologies. I'm not asking for exotic topologies. Just a buck, boost and a buck boost topologies tutorial.Dave would that be too difficult for a blog???BTW does the MC34063 able to handle more amp by using an external mosfet or transistor?

author: DJPhil
author_rank: Frequent Contributor
timestamp: September 09, 2010, 05:17:39 pm
content: Quote from: exodia on September 09, 2010, 11:28:19 amI believe so, and I think it's possible with just about any switching supply.ST MC34063 Datasheet- See page 12Motorola MC34063 Datasheet- See page 7For getting started, here's some good resources:LTSpice's example circuits- You can poke and prod working designs and see how they behave (in mostly ideal circumstances).SMPSTech.com- Lots of basics in thetutorial section, good for developing foundational knowledge.

author: Bored@Work
author_rank: Super Contributor
timestamp: September 09, 2010, 05:43:28 pm
content: Quote from: exodia on September 09, 2010, 11:28:19 amhttp://schmidt-walter.eit.h-da.de/smps_e/smps_e.htmlQuotehttp://www.onsemi.com/pub_link/Collateral/AN920-D.PDF

author: exodia
author_rank: Contributor
timestamp: September 10, 2010, 02:15:57 pm
content: Thx guys that should solve many questions

author: slburris
author_rank: Frequent Contributor
timestamp: September 10, 2010, 05:11:29 pm
content: You can go to the National sitehttp://www.national.com/powerand use their WebBenchsoftware to design many kinds of switching power supplies. It lets youplay around with different chips (all National's of course) and trade offsize, cost, and efficiency. It even lets you order a kit of parts for thesupply you just designed.Takes a lot of the drudgery of sifting through datasheets looking for inductors andcapacitors with the right characteristics.Scott