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Gigabit Ethernet Switch and PoE+ Injector

Multi-port PoE+ switch/injector design with controlled-impedance routing and protection-focused layout.

EthernetLTspicePoE+High-speedLength Tuning

Quick Write-Up

  • • Design Features 1 Upstream Ethernet Port (Non PoE) and 4 Downstream PoE+ Ports.
  • • Designed around a KSZ9567S Ethernet IC, TPS23882B PSE PoE IC, and STM32G07 MCU for configuration.
  • • Routed with attention to controlled-impedance routing, length tuning, and isolation between ports for signal integrity at Gigabit speeds.
  • • ESD and surge protection components placed strategically at connectors and along critical paths for safe operation and bring up.

PoE Switch/Injector