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230input 230v output smps circuit

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peethol

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220V AC to 5V ,3A DC

Hi

This is my first post to this forum. I'm struggling to design a transformerless power supply. It connects to the mains (220V AC) and I need to get 5V, 3A DC. The reason for me not inserting a transformer is that I've got very limited space to place the final design in. Yeah I know it's very high current and that's why I'm struggling.

Any ideas how to go about?

And doing voltage division with caps isn't working for me either, I can't find high voltage caps with a high farad reading. The largest I could get was 4.7uF 600V and that doesn't work when I'm pulling 3 amps.

Any suggestions or comments are welcome :)
 

220V AC to 5V ,3A DC

Switched mode power supply with a high frequency transformer is the only feasible way.
 

220V AC to 5V ,3A DC

you won't get more than some hundreds mA with a transformless power supply. that's it.
now you can take a look at smps as FvM said. they are now very compact.
 

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