Switch Mode Power Supply - Component Selection

Hello,

I would like to ask help from you guys. After so many days of searching I have found the method as well as the components that I will use to make DC supply with 5V output with 110 to 480 VAC input.

I have found this switching transformer https://www.mouser.com/ProductDetai...bs4Y2T2J5aH6N5pXhMBy5ud1wRZP2zrGhnYcy5/pQug==

based on its specification sheet, it can accept 110-600VAC which is perfect for my project.

I began searching for switching controllers and found out this chip https://www.mouser.com/ProductDetai...100R2G/?qs=sGAEpiMZZMtqO%2bWUGLBzeNgIMhwsXnBW

as i go through its specification sheet, it is very compatible with the transformer i just found in fact this is the typical circuit specified on its spec sheet



My problem now is, i find the specification sheet vague, in solving for the value of the external components to be used. I really tried to understand and studied the spec sheet but still I am not confident.

Does anyone has any experience with this particular chip? Or are there any chip of this topology that has a much simpler and elaborate specification sheet? I would really appreciate any body's help. Thank you.

Hello,

I would like to ask help from you guys. After so many days of searching I have found the method as well as the components that I will use to make DC supply with 5V output with 110 to 480 VAC input.

I have found this switching transformer https://www.mouser.com/ProductDetai...bs4Y2T2J5aH6N5pXhMBy5ud1wRZP2zrGhnYcy5/pQug==

based on its specification sheet, it can accept 110-600VAC which is perfect for my project.

I began searching for switching controllers and found out this chip https://www.mouser.com/ProductDetai...100R2G/?qs=sGAEpiMZZMtqO%2bWUGLBzeNgIMhwsXnBW

as i go through its specification sheet, it is very compatible with the transformer i just found in fact this is the typical circuit specified on its spec sheet

View attachment 139825

My problem now is, i find the specification sheet vague, in solving for the value of the external components to be used. I really tried to understand and studied the spec sheet but still I am not confident.

Does anyone has any experience with this particular chip? Or are there any chip of this topology that has a much simpler and elaborate specification sheet? I would really appreciate any body's help. Thank you.

Hi,
Check out the NXP's Flyback Design Tool which gives you full solution for your flyback converter.

CataM said:

Hi,
Check out the NXP's Flyback Design Tool which gives you full solution for your flyback converter.

Click to expand...

Thank you, I'm checking on it now.

I have tried the link, and I'm amazed. However, the final circuit has quite a number of parts. I also need to know the calculation part so I can understand the circuit better. But thanks anyway, I really appreciate it.

Hi,

A frequently asked question...therefore you may find many useful threads here in this forum.

Generally
* start your design with deciding your specifcations (don't choose a transformer at first)
* then decide useful circuit topology
* then choose SMPS IC
* then choose the periferal (passive) devices...like the transformer.

My hint:
If you look for
* latest datasheets
* application notes
* and other help for your design (like simulation software, selection guides...)
...then go to the IC manufacturer's internet site.

Klaus