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LM3429: About device enable

Part Number: LM3429


The nDIM pin has a threshold voltage of 1.24V and is described as Active low. (Described in Data sheet P.19 7.3.9)
However, my customer says that it is enabled when the nDIM pin is "H".
So, I would like to check the operation of device enable.

・ Is the device enabled when a DC voltage (>1.24V) is input?
・ Under what conditions do you work in active-low?

Best regards,
Yuto Sakai