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Ethernet Extender - Microsemi Introduces IEEE802.3at Integrated Circuit Solutions for High Power PoE Applications
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February 12, 2008

Microsemi Introduces IEEE802.3at Integrated Circuit Solutions for High Power PoE Applications

By Niladri Sekhar Nath
TMCnet Contributor

Microsemi (News - Alert) Corporation, developer of high performance analog mixed signal integrated circuits and high reliability semiconductors, has unveiled IEEE802.3at-ready power over Ethernet (PoE) integrated solution family, capable of delivering up to 60 watts power for devices ranging from video screen phones and WiMAX transmitters to pan-tilt-zoom cameras, thin-clients and laptop computers.

The new product family includes the PD69012 12-port PSE High PoE Manager and the PD69008 8-port PSE High PoE Manager. Both feature external power FETs, facilitating switch manufacturers to build switches that can drive 36W for every two-pairs and interface to devices consuming up to 30 watts, with ongoing currents of 720mA, as required by IEEE802.3at-draft 1.0.
Applications needing up to 60 watts can use the same Microsemi integrated circuits in a 4-pair configuration. The new ICs support Layer-2 Classification and 2-event classification, which reduces the software resources required to implement PoE switches and is essential for building IEEE802.3at midspans.
"The PD69012 and PD69008 were built to support the higher currents required by PoE Plus, allowing not only peace-of-mind but full optimization for IEEE802.3at," said Daniel Feldman, PoE Product Line Manager at Microsemi. "The PD690XX family builds upon our experience of having shipped more than 35 million PoE ports to enable customers to have the smallest real-estate and lowest power dissipation, while keeping Microsemi's power management algorithms."
Both the PD69012 and PD69008 include all of the features found in lower power PD64012G and PD64004A circuits and in the pre-standard PD64012GH and PD64004AH, including detection of pre-standard devices, dynamic power management and emergency power management.
The PD69012 and PD69008 can be configured on a port-by-port basis to work in IEEE802.3at mode or 100% IEEE802.3af compliant mode. Both PoE managers can be used standalone or with the PD69000, which enhances the power management support and provides a backwards compatible interface with the PD63000 and PDIC66000, guaranteeing customers which have been shipping PowerDsine PoE solutions in switches since 2002 can make minimal software changes to adopt the latest PoE technology.
"The IEEE802.3at standard brings a breakthrough in usability of PoE for applications in the enterprise, SME, SOHO and residential markets," said Steve Litchfield, Executive Vice President and President of Microsemi's Analog Mixed Signal Group. "The PD69012 and PD69008 are designed with the flexibility to allow for both 36W and 72W solutions, enabling our customers to have compliant and efficient products ready when the IEEE802.3at standard is ratified in early 2009."
Niladri Sekhar Nath is a contributing writer for TMCnet covering telecommunications, service providers and networking. To see more of his articles, please visit his columnist page.
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