jasensio
Junior Member level 1
Hi everyone!
I have got a PCB with two separated blocks, with independent power supplies and I/O connectors in both sides.
![](https://obrazki.elektroda.pl/4711427500_1441898812_thumb.jpg)
Gnd in the picture is chassis ground. It will converge with the other two pcb grounds (0V and I0V) close to the power input connectors, and from that point a single wire will connect with system chassis.
I know that each TVS diode should be placed close to the connector and give it a low inductance path to ground.
But my question is...which ground? Surge currents should be conducted to chassis, shouldn't they?
I will have solid internal ground planes for 0V and I0V, and I was thinking of create another plane on external layer for chassis ground and use it to tie all TVS's directly to it...something like this:
![](https://obrazki.elektroda.pl/4600778100_1441899658_thumb.jpg)
Regards
I have got a PCB with two separated blocks, with independent power supplies and I/O connectors in both sides.
![](https://obrazki.elektroda.pl/4711427500_1441898812_thumb.jpg)
Gnd in the picture is chassis ground. It will converge with the other two pcb grounds (0V and I0V) close to the power input connectors, and from that point a single wire will connect with system chassis.
I know that each TVS diode should be placed close to the connector and give it a low inductance path to ground.
But my question is...which ground? Surge currents should be conducted to chassis, shouldn't they?
I will have solid internal ground planes for 0V and I0V, and I was thinking of create another plane on external layer for chassis ground and use it to tie all TVS's directly to it...something like this:
![](https://obrazki.elektroda.pl/4600778100_1441899658_thumb.jpg)
Regards