230VAC to 5VDC 2A SMPS power supply design needed.

Wynand · 18th June 2010, 08:12 AM

Hi guys, I need to make a power supply that can do 5v 2-3A powered from 230VAC. This needs to be a small psu so it would probably have to be a smps design.

It's to power a GPRS module and ethernet controller.

Does anyone know of a reference design or design I could use?

Thanks for any help in the matter.

Wynand.

Sch3mat1c · 18th June 2010, 09:51 AM

Standard fare in most flyback controller chip appnotes. There should be one in UC3842 appnotes.

Tim

gootee · 19th June 2010, 10:23 PM

There should be plenty of application notes and reference designs for that at places like linear.com, and maybe national.com, among many others.

star882 · 21st June 2010, 04:19 PM

Off-the-shelf modules are commonly available for that specification.

abraxalito · 21st June 2010, 04:27 PM

Quote:

Originally Posted by star882

Off-the-shelf modules are commonly available for that specification.

Yes, I recently bought a 5V 4A brick - size 10cm * 6cm * 2.5cm for 35RMB (under $6 even with the recent Yuan revaluation). Can't see how it could possibly be worthwhile to build your own unless you have some particularly stringent noise spec for instance.

18th June 2010, 08:12 AM	#1
Wynand diyAudio Member Join Date: Mar 2005 Location: Cape Town	230VAC to 5VDC 2A SMPS power supply design needed. Hi guys, I need to make a power supply that can do 5v 2-3A powered from 230VAC. This needs to be a small psu so it would probably have to be a smps design. It's to power a GPRS module and ethernet controller. Does anyone know of a reference design or design I could use? Thanks for any help in the matter. Wynand.

18th June 2010, 09:51 AM	#2
Sch3mat1c diyAudio Member Join Date: Jan 2003 Location: Milwaukee, WI	Standard fare in most flyback controller chip appnotes. There should be one in UC3842 appnotes. Tim __________________ See my Electronics webpage -- the home of Vacuum Tube Drag Racing. The key to being a successful Audiophile: "I reject your reality and substitute my own!"

21st June 2010, 04:19 PM	#4
star882 diyAudio Member Join Date: Mar 2007	Off-the-shelf modules are commonly available for that specification. __________________ "Fully on MOSFET = closed switch, Fully off MOSFET = open switch, Half on MOSFET = poor imitation of Tiffany Yep." - also applies to IGBTs!

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19th June 2010, 10:23 PM	#3
gootee diyAudio Member Join Date: Nov 2006 Location: Indiana Blog Entries: 1	There should be plenty of application notes and reference designs for that at places like linear.com, and maybe national.com, among many others.

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