Solution Finder

Drain Pin of TOP heating and damaged

Posted by: hhmunjani on Fri, 08/06/2021

We have designed an  SMPS with two coils of 12V@0.5A. Although our actual load is 3W total.

We manufacture approx 5000 SMPS per year since last 15 years. We found that there are almost 50nos per year are getting damaged.

Most of them have Drain PIN of TOP245YN damaged i.e. the TOP is blasted.

Could you suggest me any solution ?


Submitted by PI-Wrench on Tue, 08/10/2021

In order to get an idea of possible problem areas, it would be a good idea to post schematic, a picture of the layout, and your transformer design.

Are these failures field failures or failures in test?