UCC2897A: UCC2897A - ESD reset issue

Hi,

The pins that can cause restart during ESD test:

LineUV

LineOV

CS

The solutions are reduce the noise effect by layout and also adding bypass capacitors from the pins to GND or PGND pins.

You need to examine the layout to minimize the parasitic capacitance to couple the ESD points to these pins. Also adjust the Y cap size between primary and secondary and minimize its parasitic coupling through the layout.