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AN313 - USING THE Si3400 AND Si3401 IN HIGH POWER APPLICATIONS

Key Features

  • an increased hot swap switch current limit of 470 mA (minimum). This allows the Si3401 to support 14 to 16 W.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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AN313 USING THE Si3400 AND Si3401 IN HIGH POWER APPLICATIONS 1. Introduction Emerging Power over Ethernet (PoE) applications, such as multi-band and 802.11n access points, often require more power than the 12.95 W specified by the IEEE 802.3af. This application note outlines how to use the Si3400 and Si3401 to support powered device (PD) applications over 15 W output, which corresponds to www.DataSheet4U.com about 20 W of input power from the PSE. The current standard for Power over Ethernet or PoE is IEEE Std™ 802.3-2005, clause 33. Although there is currently no ratified standard beyond this, a standard, commonly referred to as PoE+, is being actively developed in the p802.3at subcommittee.