230VAC to 5VDC 2A SMPS power supply design needed. - diyAudio
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Old 18th June 2010, 09:12 AM   #1
Wynand is offline Wynand  South Africa
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Default 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.
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Old 18th June 2010, 10:51 AM   #2
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Standard fare in most flyback controller chip appnotes. There should be one in UC3842 appnotes.

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Old 19th June 2010, 11:23 PM   #3
gootee is online now gootee  United States
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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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Old 21st June 2010, 05:19 PM   #4
star882 is offline star882  United States
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Off-the-shelf modules are commonly available for that specification.
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Old 21st June 2010, 05:27 PM   #5
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Quote:
Originally Posted by star882 View Post
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.
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