TVS Layout Requirements
(1) The TVS device should be placed as close as possible to the input end of the interference source (the connector is close to the panel), as shown in the figure below, which shows the layout requirements of the TVS device.
(2) The wire connecting the TVS device should be as short and thick as possible to reduce the parasitic inductance and low impedance loop of the wire. And ensure that the wiring of the TVS device is shorter than the wiring of the protected object, and ensure that the external pulse interference is released through the TVS device, as shown in the following figure for the TVS wiring requirements.
(3) The TVS device protection circuit should discharge energy to the protection ground. It is not recommended to connect it directly to the working signal ground to avoid rebounding of the working ground plane signal. The grounding requirements of the TVS device are shown in the figure below.