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Simple, Efficient, and EMI Compliant Power Over Ethernet EVBs

The latest PoE designs from Silicon Labs use Würth Elektronik transformers to simplify designing, testing, and procuring magnetic components

Image of Silicon Labs' Simple, Efficient, and EMI Compliant Power Over Ethernet EVBs With Silicon Labs' latest PoE evaluation boards, which leverage Würth Elektronik's standard PoE transformers to simplify sourcing magnetic components, users can easily add 15 W, class 3 Power over Ethernet (PoE) to any design. The three isolated flyback designs offer 3.3 V, 5 V, and 12 V output options, all reaching over 80% peak end-to-end (PoE input to DC output) efficiency. All three use a simple four-layer PCB and are fully EMI compliant with the EMI report included in the user guide. Silicon Labs' Si3404 PoE PD device manages both the IEEE PoE interface and the DC-DC conversion with internal FETs to reduce board space and costs.

Features
  • 3.3 V, 5 V, or 12 V output options
  • Up to 15 W, class 3 power
  • Isolated output
  • Over 80% end-to-end efficiency
  • EMI and IEEE PoE compliant
  • Off-the-shelf Würth Elektronik transformers
  • Small PCB area
  • Same user guide for all three designs
Applications
  • Anything with an Ethernet port that needs power
  • Security cameras
  • IP phones
  • IoT/Bluetooth® gateways
  • Wireless access points
  • Payment terminals
  • Lighting systems

Eval Boards

ImageManufacturer Part NumberDescriptionMain PurposeOutputs and TypeAvailable QuantityView Details
3.3V SI3404 ISOLATED FLYBACK CLASI3404FB3V3KIT3.3V SI3404 ISOLATED FLYBACK CLASpecial Purpose DC/DC, Power Over Ethernet1, Isolated5 - ImmediateView Details
5V SI3404 ISOLATED FLYBACK CLASSSI3404FB5V3KIT5V SI3404 ISOLATED FLYBACK CLASSSpecial Purpose DC/DC, Power Over Ethernet1, Isolated5 - ImmediateView Details
12V SI3404 ISOLATED FLYBACK CLASSI3404FB12V3KIT12V SI3404 ISOLATED FLYBACK CLASSpecial Purpose DC/DC, Power Over Ethernet1, Isolated5 - ImmediateView Details

Würth Elektronik Components

ImageManufacturer Part NumberDescriptionAvailable QuantityView Details
TRANS FLYBACK POE 127UH SMD749119933TRANS FLYBACK POE 127UH SMD0View Details
TRANS FLYBACK POE 127UH SMD749119950TRANS FLYBACK POE 127UH SMD87 - ImmediateView Details
TRANS FLYBACK POE 127UH SMD7491199112TRANS FLYBACK POE 127UH SMD42 - ImmediateView Details
CAP CER 100UF 6.3V X5R 1210885012109004CAP CER 100UF 6.3V X5R 1210801 - ImmediateView Details
CAP CER 1000PF 100V X7R 0603885012206108CAP CER 1000PF 100V X7R 06035274 - ImmediateView Details
FIXED IND 150NH 30A 0.235MOHM SM744302015FIXED IND 150NH 30A 0.235MOHM SM967 - ImmediateView Details
CAP CER 10000PF 100V X7R 0805885012207122CAP CER 10000PF 100V X7R 080512206 - ImmediateView Details
FERRITE BEAD 600 OHM 0805 1LN742792040FERRITE BEAD 600 OHM 0805 1LN214370 - ImmediateView Details
Published: 2021-05-18