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Current Increasing inside housing - lnk420

Posted by: rohan_shah on

Hi,

 

I'm developing 50W  (23V, 2.1A) led driver using LNK420. Design worked perfectly when tested outside housing. But when I put my driver on metal housing base, current jumps to 2.5A.

Comments

Submitted by rohan_shah on 07/27/2013

I am attaching the images of the problem I'm facing. Housing is flood light housing designed for 50W.

Submitted by PI-Dunwell on 07/29/2013

Hi,

Pls review the layout of theboard especially the V-pin of the IC. A noise injected on this pin could result on output power variation.

Regards