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UCC25710 frequency issue

Other Parts Discussed in Thread: UCC25710

Description:

    This is LED lighting application, when use multimeter resistance gear to test Fmin voltage ,the IC can’t work normal and not recover.Thanking it maybe the capacitance effect, but it can not recover after remove the multimeter. When work frequency into 500K(over spec 350k) must be reset to work again. IC also appear such problems when text surge

 

Question:

How does the phenomenon occur?How to solve?

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