L6924U - how to connect IUSB pin in AC mode

[Central SUPPORT]

We are considering to use L6924U for a new design for a battery charging circuit in our industrial wireless remote controller project.

If we set up L6924U for AC input (MODE grounded), do we need to do anything with IUSB pin? Can we just ground it (w or w/o resistor) or leave it floating or tie it to IAC pin?

NOTE: This question and answer originated from a customer support case which was handled by us. We regularly review support cases and add any helpful ones here for all to benefit from.

[Central SUPPORT]

In case of exclusive AC Mode set-up, we recommend to leave IUSB pin floating, i.e. no connection to GND, no resistor, no short to IAC.