Bypassing high frequency currents successfully

[japlytic]

I have read something interesting on Page 11 of the Power Integrations TNY268 datasheet:

There are constrictions in the traces connected to the input and output filter capacitors. These constrictions are present for two reasons. The first is to force all the high frequency currents to flow through the capacitor (if the trace were wide then it could flow around the capacitor).

This is something to consider when designing a power supply, especially a switching power supply. I have seen some power supplies follow this rule regarding the PCB trace constrictions.

[PM650]

Re: Bypassing high frequency currents successfully

This is really nothing new, its quite frequently used even on low-freq. (60Hz) board designs. It's somewhat analogous to star grounding (directing the currents & such)..
pioneer vsx-917: