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What is PoE?
Power over Ethernet (PoE) is the ability for the LAN switching infrastructure to provide power over a copper Ethernet cable to an end-point (powered device). This capability was once referred to as inline power.
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2010-12-30 Multi-port 802.3at PoE solution supports four-pair powering, Gigabit switching
Microsemi says its new PowerDsine 6-port PD-9506G and 12-port PD-9512G midspans deliver up to 60W of power over all four pairs of Ethernet cabling, cutting power dissipation in half when compared to conventional two-pair solutions and providing 15 percent less energy consumption.
2003-06-10 Motorola, PowerDsine collaborate for PoE ASIC
Motorola Inc.'s Semiconductor Products Sector and PowerDsine Ltd are jointly designing an ASIC for the emerging Power-over-Ethernet market.
2005-06-14 More PoE-supporting modular jacks from ERNI available
ERNI expanded its line of integrated magnetic modular jacks with new versions supporting remote power applications (Power over Ethernet).
2008-04-08 Midspan simplifies PoE in SOHO environments
A low-cost, 8-port midspan that is simple network management protocol (SNMP)-capable has been developed by Phihong USA Inc. for PoE implementation in SOHO environments.
2010-06-28 Microsemi, Cisco forge PoE patent license deal
Microsemi Corp. that it has signed a patent transfer and licensing agreement with Cisco Systems Inc., covering PoE patents, including patents that are essential to the IEEE 802.11af and 802.11.
2012-03-22 Microsemi rolls 60W 24-port PoE midspan
The PD-9524G Power-over-Ethernet midspan is compliant with and claims to deliver improved cost and power efficiency by cutting energy consumption by 15 percent.
2007-09-25 MIC2145 low power POE flyback converter
The MIC2145 skip mode controller is used to implement a flyback converter that is intended for use in non-isolated, low power, POE applications.
2009-05-27 Mega PoE midspans provide up to 95W per port
PhihongUSA has developed a PoE midspan product line that claims to offer the highest power per port available on the market.
2005-09-30 Maxim IEEE802.3af-compliant PSE controller suits PoE apps
Maxim Integrated Products unveiled a quad IEEE802.3af-compliant power-sourcing-equipment (PSE) controller for Power-over-Ethernet.
2007-11-28 Make IP telephony as reliable as a POTS device with PoE
The IEEE 802.3af standard, also known as PoE, addresses all the issues in supplying power to IP telephony devices via Ethernet cabling.
2005-11-01 Low-cost solutions for PoE-powered devices
Create reliable solutions that are low-cost, energy efficient and easy to manufacture using integrated power ICs
2006-12-01 Low-cost IC drives PoE devices
Freescale Semiconductor Inc. is rolling out its first chip for end devices that draw their power from an Ethernet line.
2005-01-27 Linear verifies PoE controllers using Ixia test solution
Linear Technology Corp. has selected Ixia, a provider of high performance IP network testing solutions, to demonstrate and test the full feature capabilities of its power over Ethernet chipset.
2004-02-20 Linear Tech PoE controllers comply with IEEE 802.3af
Linear Technology has released two quad PoE controllers that are fully compliant with the IEEE 802.3af specification.
2004-11-10 Linear Tech PoE controller simplifies PD design
Linear Tech introduced an IEEE 802.3af Power-over-Ethernet controller that features an integrated switching regulator to simplify powered device design.
2007-04-10 Linear Tech intros PoE controller for power-hungry PD applications
Linear Technology has introduced a PoE interface controller for high-power Powered Device applications.
2004-05-10 Linear develops standards-compliant PoE controllers
Linear Technology has launched two quad PoE controllers that are compliant with the nascent IEEE802.3af specification.
2009-09-04 Is PoE the 'next big thing'?
Our industry is always searching for, hoping for and betting on the next big thing. Will PoE (IEEE 802.3af) be one of the winners?
2005-12-23 IR targets PoE apps with its new product
International Rectifier introduced the IRF4000, a 100V-rated device integrating four HEXFET MOSFETs into a single Power MLP package for Power-over-Ethernet apps.
2013-04-03 IEEE sets up 802.3 4-pair PoE study group
The study group will consider a 4-pair solution's capability to enhance energy efficiency and provide greater than 25.5W in improving PoE.
2004-11-25 IEEE forms high-power PoE group
PowerDsine, a supplier of power-over-Ethernet (PoE) solutions, announced Monday (Nov. 22) that the Institute of Electrical Electronics Engineers (IEEE) has formed a new 802.3 Study Group to discuss the enhancement of the IEEE PoE 802.3af standard.
2008-10-28 High power PoE applications
This application note explains how the NCP1081 PoE-PD device can be used to deliver high power levels to applications over the Ethernet cable.
2008-03-03 High PoE made simple
According to National Semiconductor's Grant Smith, high Power-over-Ethernet (HPoE) standards are still to be resolved. What is expected by most is that the voltage source will be increased to 53Vdc, usable current from each line to about 750mA, and the total resistance in the cable be limited below 12.5. But for some applications, this is not enough power. One solution is to use multiple Ethernet lines, but this raises the problem of power sharing.
2005-01-04 Half-brick for PoE touts high efficiency
Touting high efficiency, Advanced Power Conversion's new dc-dc converter delivers 200W at a regulated 52.5V for PoE apps.
2012-05-10 Guard PoE systems from lightning surges, electrical hazards
Read about evidence-based design methods that protect PoE equipment from various electrical hazards.
2007-02-28 Gbit PoE midspan targets WLAN access points
The new member of Microsemi's PowerDsine 3000 midspan family eliminates the need for external power supplies at WLAN access points and other low-density networks having 10/100/1000 Base-T Ethernet-connected devices.
2006-10-12 Freescale unveils its first PoE/PD controller
Freescale's first single-chip PoE controller combines a powered device interface port supporting the IEEE 802.3af PoE standard and a pulse width modulator controller.
2004-12-06 Erni connectors suit GbE, PoE apps
The new single-port MaxJack RJ45 connectors from Erni are configured for IEEE 802.3-compliant apps, such as Gigabit Ethernet or PoE.
2010-02-09 DIMMs ease PoE+ integration in switches
From Microsemi Corp. comes the PD67100 PoE+ module family, which integrates the company's PD69012 PoE Manager device into an easy-to-integrate DIMM.
2008-05-23 DC/DC PoE splitter loads up to 45W
Phihong has launched the POE45-120 series of 45W DC/DC PoE splitters for high power needs.
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