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as the heat increases current also increases

Posted by: nithin on

Hi

   I am using lnk 419 for 28w constant current power supply ,the supply is inside the plastic casing. whats the problem is current is increasing from 620ma to 680ma within 3 hour. I think it is because of the heat inside the case.so is there any option to avoid this kind of problem.  

Comments

Submitted by PI-Crumb on 11/07/2014

hi,

 

Each component has different temperature characteristics which may contribute to the increase in output current.

LNK-PH itself has TC variation. One way to limit the rise is to make sure you have adequate heatsink on LNK-PH to manage device temperature better. You may also set the output current lower at room temperature so that the steady-state output current is lower.