Manufacturers > Texas Instruments > Reference Designs > PMP21103

PMP21103 Reference Design

Texas Instruments

Class 5 PoE PD (12 V/2.5 A) supply reference design with smooth transition to auxiliary

Description

This reference design implements an IEEE802.3bt compliant Class 5 Power over Ethernet (PoE) Powered Device (PD) with smooth transition between the PoE input and an auxiliary supply connected to the output.  The design consists of a 12-V/2.5-A active clamp forward converter utilizing the UCC2897A controller and allows one PoE Power Source Equipment (PSE) supply 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.  An IEEE802.3bt compliant TPS2373-4 high power PD controller is utilized to control all PoE functions.In need of an IEEE802.3bt-ready PSE controller? Check out the TPS23881.

Features
  • Smooth transition when switching between PoE input and 12-V adapter on output89% efficiency with 12-V/2.5-A output and PoE input (FET OR-ing)Diode OR-ing option for lower cost
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