1.5/3/12v - 35v DC To DC converter. - Page 1
Forum section: electronics / projects

author: Mr. Transistor
author_rank: Newbie
timestamp: November 06, 2010, 07:19:15 pm
content: i need one for a little project i am doing at home. i am willing to work with any of those three input voltage but i need 35v out and i need it in a really small package.... anyone have a schematic i can follow for something like this?

author: Zero999
author_rank: Super Contributor
timestamp: November 06, 2010, 07:58:40 pm
content: How much current do you need?

author: allanw
author_rank: Frequent Contributor
timestamp: November 07, 2010, 02:52:07 am
content: Try using National's designer software online.

author: Mr. Transistor
author_rank: Newbie
timestamp: November 07, 2010, 09:18:00 pm
content: Quote from: Hero999 on November 06, 2010, 07:58:40 pmnot a whole lot i just need it to charge a cap bank. about 10farads :O

author: Zero999
author_rank: Super Contributor
timestamp: November 07, 2010, 09:36:18 pm
content: Any boost converter which outputs enough current to overcome the leakage current can do that.How fast does it need to charge the capacitors?Is it acceptable if it takes seconds, hours or days?

author: NiHaoMike
author_rank: Super Contributor
timestamp: November 08, 2010, 05:13:49 pm
content: It's very easy to build a boost converter. You'll probably need to precharge the caps but that can be as simple as a car light bulb or PTC in series with the output.

author: Mr. Transistor
author_rank: Newbie
timestamp: November 17, 2010, 07:27:22 am
content: i hate to sound very novice. but i am and i really am not picky about specs i was just hoping to find a good open source schematic... i have been having the hardest time googleing for one

author: Unknown
author_rank: Unknown
timestamp: November 17, 2010, 05:19:10 pm
content: The datasheet of an SMPS converter often has a schematic. Dave's video about the DC-to-DC converter might be instructive. National's Webbench software that allanw mentioned might be useful, but would probably be overkill and recommend an obscure and expensive switcher in a tiny package. It might be useful if you're really space constrained, since the modern high-frequency switchers require smaller inductors than the cheap, old stuff like MC34063.Something with internal transistor that only requires a few external components should be fine, since the amount of current can be fairly low.

author: Mr. Transistor
author_rank: Newbie
timestamp: November 21, 2010, 03:40:46 am
content: is there a pdf form of the formulas for the MC34063 somewhere? i hate having to keep looking at youtube to see his data.

author: Zero999
author_rank: Super Contributor
timestamp: November 21, 2010, 10:16:31 am
content: You need to learn how to use Google.http://www.google.co.uk/search?q=MC34063&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a

author: Mr. Transistor
author_rank: Newbie
timestamp: November 21, 2010, 09:42:57 pm
content: Quote from: Hero999 on November 21, 2010, 10:16:31 amYOU NEED TO LEARN HOW TO BE POLITE.

author: Unknown
author_rank: Unknown
timestamp: November 21, 2010, 10:09:06 pm
content: Quote from: Mr. Transistor on November 21, 2010, 09:42:57 pmHow do you think that yelling at people who are helping you is a good idea? I thought it was a perfectly adequate answer, don't blame Hero for telling the truth.

author: Mr. Transistor
author_rank: Newbie
timestamp: November 23, 2010, 06:20:31 am
content: i understand the best answer to almost any and all questions is google it. but it was just a rude way of putting it. just simply because i didn't know the proper search perameter i must not know how to oporate google. but i did neglect to thank this person for giving me the link i have been learning from this data thank you very much! =]