Power Sourcing Equipment / Power over Ethernet

Next generation power-over-ethernet (PoE) systems can deliver up to 100 W to each powered device. Large LCD screens, wireless hot-spots and pan-tilt-zoom CCTV cameras are placing increased demands on PoE power sourcing equipment (PSE).

Block diagram

Highlighted components are Nexperia focus products

Design considerations

  • System capability must include ‘soft-start’ procedures, resilience to short-circuits, together with optimized thermal management and power density.
  • Superior protection and performance, such as low RDS(on) parameters, can be achieved by using dedicated PoE MOSFETs. They are designed specifically for the latest high-power PSE controllers.

MOSFET and GaN FET Handbook

Drawing on over 20 years’ of experience, the MOSFET and GaN FET Application Handbook: A Power Design Engineer’s Guide brings together a comprehensive set of learning and reference materials relating to the use of MOSFETs and GaN FETs in real world systems.

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Nexperia in action

PSMN075-100MSE, PSMN040-100MSE, PSMN4R8-100BSE MOSFETs referenced in Linear Technology's LTC4279 New PSE Controller datasheet are from our differentiated ASFETs for Hotswap and Soft Start / ASFETs for Power over Ethernet portfolios.

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