SMPS - Switching Mode Power Supplies - Any example ?

[mister_e]

depending your current requirement, you may find some already built one fore few bucks. i don't think they even need to be design in most case.

Most company have some SMPS controller IC as well. worth to have a look there.

[flotulopex]

Hello Mister_E,

Would you have one or more links to these components please? I must not search the right way (correct words) since I can't find anything.

By the way, what do you use (what would you use) in this case?

Thank you HenrikOlsson, I read this application note already. Unfortunately, this kind of power supply allows only extremeley narrow min/max power ranges.

[mister_e]

How much current do you need?

[flotulopex]

I need around 0,05mA.

Input voltage is 230VAC 50Hz (Europe).

[mister_e]

eeuuuhh 0.05 mA or 0.05 A

[flotulopex]

... had a translation problem.

It is 0,05A or 50mA.

[mister_e]

same thing to me, but it make much sense...

for ONLY 50mA, i don't think it really worth to build something really complicated and over price the whole thing. Maybe the Melanie's Transformerless Power Supply example could be enough with few mods.

My english is really bad.... :-)

mine too, but... who cares

EDIT: maybe something around those one
http://www.discovercircuits.com/DJ-C.../offline5v.htm
http://www.st.com/stonline/products/...re/an/8313.pdf

be really careful with that kind of stuff..