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PMP20859 Reference Design

Texas Instruments

Dual-input redundant PoE PD with smooth transition reference design

Description

This reference design implements an IEEE802.3bt (draft) Power over Ethernet (PoE) Powered Device (PD) with dual redundant inputs and a smooth transition between these inputs and an auxiliary input.  The design consists of a 5V/6A synchronous flyback converter and allows for up to three power supplies (two PoE Power Source Equipment (PSE) supplies and one AC/DC wall adapter auxiliary supply) to be used in order to decrease the probability of power and data loss in your system.In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23881.

Features
  • Redundant inputs:  two PoE and 48V adapterContinuous output when switching between inputs84% efficiency with 5V/6A output and PoE input
Applications
  • Small cell base station
  • WLAN/Wi-Fi access point
  • Outdoor backhaul unit
Product Categories
  • Power management

End Equipment Reference Diagrams

Application Area End Equipment
Small cell base station https://www.ti.com/solution/small-cell-base-station#referencedesigns
WLAN/Wi-Fi access point https://www.ti.com/solution/wlan-wifi-access-point#referencedesigns
Outdoor backhaul unit https://www.ti.com/solution/outdoor-backhaul-unit#referencedesigns
Additional details