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Switch Mode Power Supply Tutorial
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Switch Mode Power Supply Tutorial

by kevinm on Thu Oct 28, 2010 12:46 pm

Not sure if this is the place to post this but...

Hackaday had a post (http://hackaday.com/2010/10/27/power-su ... xperience/) about your power supply tutorial (http://www.ladyada.net/learn/powersupply/index.html).

Before you get to the switch mode power supply tutorial you should check out the power integration LNK501PN. I used this about 5 years ago and it was the lowest cost solution I could find. The chips are available at mouser and digikey for under $1.50 single piece and under $0.75 in high quantities. The power integrations web site has a link to get the transformer samples quickly. Here's a link to the charger reference design I used (PDF) http://www.powerint.com/sites/default/f ... s/di18.pdf

-Kevin

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Re: Switch Mode Power Supply Tutorial

by Hfuy on Thu Oct 28, 2010 5:49 pm

I can only direct you to my "SMPS are outrageously twitchy" thread.

They are. I just bought a switching LED driver off the shelf, and even that just gets hot and makes smells!
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Re: Switch Mode Power Supply Tutorial

by pstemari on Mon Nov 08, 2010 10:50 pm

Hmm, hadn't read that tutorial before. I'll point out that two diodes and a center tap isn't really full wave rectification--only one half of the transformer secondary is used at a time.
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Re: Switch Mode Power Supply Tutorial

by oPossum on Mon Nov 08, 2010 11:56 pm

It is full wave, half bridge.

Both halves of the cycle are used, so it's not half wave.
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Re: Switch Mode Power Supply Tutorial

by stinkbutt on Tue Nov 09, 2010 1:32 am

Plus, it hardly matters if you don't use the full capacity of the transformer if you're just going to dump the output into the boost and/or buck converter anyway.
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Please be positive and constructive with your questions and comments.