Power sourcing equipment below 250W
Get your PoE power sourcing equipment designs ready for the future
Design power and space efficient power supplies for PoE PSE below 250W
Technological advances and the newly introduced IEEE 802.3bt standard increase the power that can be delivered via Power over Ethernet to up to 100W. This development creates new challenges for the design of main power supplies for PoE Power Sourcing Equipment (PSE).
Either upgrading existing Ethernet designs to newly integrate PoE ports or adding single IEEE 802.3bt compliant PoE ports already adds significant power demand to the overall power budget.
While the maximum power output of PoE switches increases with every additional port, the available system size for the power supply needs to stay the same. In short, this results in several new requirements for PoE power sourcing equipment:
- Higher output power as with every additional port up to 100W of needed power is added to the PoE power budget
- Change from Active Clamp Flyback (ACF) to resonant LLC SMPS topologies due to increasing efficiency and power requirements
- Increased power density to keep the existing form-factor despite an increasing output power
- High efficiency for broad load conditions of the main power supply
In addition, many IEEE 802.3bt compliant PoE PSE controllers require external power MOSFETs to control the power at the ports in a safe way. Low RDS(on) and wide safe operating areas (SOA) ensure efficient systems while providing a safety margin to protect the system from failure.
Infineon offers a wide portfolio of highly efficient semiconductors for cutting-edge PSE power designs. We are the only manufacturer to offer an entire range of semiconductors for PSE power supply solutions: From our high voltage CoolMOS™ MOSFETs and our low voltage OptiMOS™ MOSFETS to our SiC and XMC series microcontrollers as well as our CoolSET™ auxiliary converter systems. Or opt for our CoolGaN™ technology to meet the increasingly high power demands of rack-based systems.
Our team of experts is ready to support you in your design quests. Besides power supplies below 250W, we also feature PSE designs above 250W.
Solution Finder – your guide to a successful design
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You can already access 400 solutions for motor control and drive applications in our tool. Coming soon: solutions for lighting, power supplies and other applications.
Introduction to High Voltage High Power SMPS - Part 1 of 3
Introduction to High Voltage High Power SMPS - Part 2 of 3
Introduction to High Voltage High Power SMPS - Part 3 of 3
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