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LM5069: Question about dv/dt start up and Timer function

Guru 19595 points
Part Number: LM5069

Please let me know about two points below for LM5069-1.

①Is there calculation method for dv/dt start up?

②If in the case of LM5069-1, what is the external circuit for TIMER pin? 

 (Connect to GND, OK?)

Best regards,

Satoshi