Power

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Published on 19 Jun 2020 - Updated on 25 Jun 2020

Power filtering

  • 1 x 100nF bypass capacitor per power pin
  • 1 x 100nF bypass capacitor for two analog power pins ( if two pins are very close)
  • Add a PI filter for analog power rails (Ferrite bead + 2 capacitors)
  • For high power chips (CPU, Ethernet phy, etc…) add two spares 0603 capacitors per power rail
  • Next to connectors, add one 0603 10uF capacitor and two 100 nF capacitors.
  • For noisy devices like motor or HDD, add a ferrite bead