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12v 3Amps power supply design

Posted by: ikuks on

Hi there,

 

I am planning to design 12v 3amps power adapter, can I use TNY268 OR TNY290? Please provide me some application notes.

Supply voltage is 110vac - 230vac.

Thank you.

Comments

Submitted by PI-LeoDavinci on 10/04/2016

Hi,

Based on your specification the output power is 36W. TNY268 is not applicable for your application since this has only 10W power capability in a typical non-ventilated enclosed adapter measured at 50 °C ambient. You cannot use TNY290 as well because it only has 20W power capability considering your input specs and application (adapter). I would suggest that you use  TOP256EN/YN/EG for this application since this has a power capability of 40W. For some design example you may refer below link:

https://ac-dc.power.com/sites/default/files/PDFFiles/der197.pdf

 

For other design examples you may wish to check the following link:

https://ac-dc.power.com/products/topswitch-family/topswitch-hx/