220 V AC to 5V AC planer PCB transformer design? Output current is around 10mA

[6716914]

I want to design a 220V 50Hz AC to 5V AC current is around 5mA~10mA PCB planner Transformer.

The efficiency is just more than 10%, that is enough.

Here is the question ?

1 Can I design it? Did anyone design this? Because the winding N is around 45:1. I think it will be not easy, but my current need is very small.

2 How Big it will be ? The frequency is just 50Hz. Hope better give me some equations to explain this.

 

[marce]

https://www.ferroxcube.com/appl/info/plandesi.pdf

https://www.ti.com/download/trng/docs/seminar/Topic4LD.pdf

**broken link removed**

Use a trace width is based on the IPC-2152 Current Capacity and Heating of Traces (Use the Saturn PCB toolkit to get your figures).

 

[6716914]

Thanks for your reply, my question doesnot match with these documents, I mean, my main frequency is very low, 50Hz, and these documents are good for the high Frequency AC input. I know this, and I just want to know, did anyone do the low frequency 50Hz 220V AC plannar Tranformer?