12 April 2012
PoE controller brings plug and play simplicity to embedded PSE designs
Silicon Laboratories' Si3462 is a single port Power over Ethernet (PoE) controller said to bring economical plug and play simplicity to embedded power sourcing equipment (PSE) designs.
The module is designed to ease the development of endpoints such as residential gateways, set top boxes and surveillance and security systems that connect to powered devices such as VoIP phones, security cameras, keypads, network attached storage and WiFi access points.
When deployed with the new Classification Optional Mode, SiLabs says it eliminates the need for up to 10 discrete components, reducing the total bom cost to $1.60 (approx £1). In this mode, the controller determines when a valid powered device is connected at the other end of the cable and applies a predetermined amount of power.
The Si3462's detection, classification, power up, fault monitoring, protection and disconnect processes all run according to hardware pin configurations without the assistance of a host processor or mcu. An innovative architecture is said to be responsible for a simplified overall system design, reduced cost and improved time to market.
"The new Si3462 controller makes the adoption of PoE+ in embedded PSE systems easier and more cost effective than ever, while freeing developers from the standards compliance risks and complexities associated with other solutions," said Jim Judkins, product line director for access products at SiLabs. "PSE can now be deployed with plug and play simplicity, eliminating the need for host mcus and high overhead software."
The Si3462 controller provides a variety of pin selectable operating modes that enable the use of the device in both PSE endpoint and midspan applications. It also supports midspan power injectors used in small business and enterprise local area networks.