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TOP SWITCH frequency run

Posted by: zepyzagak on

I try to run TOP261LN by 100 wt at 130KHz by grounding pin F, but chip run at 66 KHz.

What is the problem.

Comments

Submitted by PI-Cochrane on 04/30/2014

You have to double check your connection. If F pin  is really connected to S pin, and the frequency is 66kHz, then I would like to doubt the source of the parts. As you know, a lot of customers use TOPSWITCH for different applications, and it is incredile that TOPSWITCH has this problem.

 

Regards