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LM3488: Strange Start-up Behavior

Part Number: LM3488

Dear, Sir.

My customer is using LM3488 as Fpyback topology.

Now, they are facing a strange start-up behavior.

I would like to obtain your advice based on the customer's schematic.

Please contact my private mail as below if it is possible.

I am expecting your help at this time.

Mail : hideyuki_sakai@marubun.co.jp

Best Regards,

H. Sakai