Reference design for PoE adapter serves EMC-compliant network connection
Würth Elektronik has released the RD022, a GB-PoE+ Ethernet USB adapter reference design. It is available free of charge via its website.
Devices networked via Ethernet usually depend on a separate power supply, however, if these terminal devices can operate with low power consumption, then PoE (power over Ethernet) is an alternative where data transmission and power supply are achieved via a network cable.
Devices with low power consumption, like IP cameras, VoIP phones, Wi-Fi routers, network switches, LED lighting or access systems, are suitable for power supply through the Ethernet line. The RD022 reference design can provide up to 25W of power and shows how this can work while still maintaining EMC compliance.
The GB-PoE+ Ethernet USB adapter is based on the reference design of a 1Gbit per second Ethernet USB adapter without PoE functionality.
It provides three interfaces: a USB Type-C interface (USB 3.1), an RJ45 1Gbit per second Ethernet interface with integrated PoE functionality, and a connection for a DC/DC converter with an adjustable output voltage of 6.0 to 18V and a maximum output power of 25W.
The board can help designers begin working with PoE technology. The reference design familiarises users with the technology, signals, interface structure, power-up and PoE detection of a Gigabit PoE interface. It provides the hardware design for power sourcing equipment and the powered device. It also explains the conception and construction of the adapter board, for example current flow, USB controller and interface, Ethernet interface as well as power supply (PoE). Würth Elektronik said it has place special importance on the EMC-compliant design to highlight its significance.
Würth Elektronik eiSos Group is a manufacturer of electronic and electromechanical components for the electronics industry. It is one of the largest European manufacturers of passive components and is active in 50 countries. Production sites in Europe, Asia and North America supply a growing number of customers worldwide.
The product range includes EMC components, inductors, transformers, RF components, varistors, capacitors, resistors, quartz crystals, oscillators, power modules, wireless power transfer, LEDs, sensors, radio modules, connectors, power supply elements, switches, push-buttons, connection technology, fuse holders and solutions for wireless data transmission.
The company makes available all catalogue components from stock without minimum order quantity, together with free samples and extensive support through technical sales staff and selection tools.
Würth Elektronik is part of the Würth Group, which develops, produces and sells fastening and assembly materials.
