Dual-input redundant PoE Class 6 PD with smooth transition and telemetry reference design


Design files


This design implements a Power over Ethernet (PoE) Class 6 Powered Device (PD) with dual redundant PoE inputs and smooth transition between these inputs and a an auxiliary input. Two TPS2372-3 PD controllers are utilized for high power PoE control up to 51W. A 5V at 9A active clamp forward converter is implemented with the PWM portion of a TPS23734 IC. An INA237A provides input voltage/current/power/temperature measurements via I2C.

  • Dual redundant PoE inputs plus auxiliary 48V input         
  • Smooth transition between all inputs         
  • PoE Port 1 priority over PoE Port 2         
  • Auxiliary priority over either PoE Port         
  • Telemetry for input voltage, current and power via I2C         
  • 88% efficiency from PoE input; 90% efficiency from auxiliary input
Output voltage options PMP23366.1
Vin (Min) (V) 42.5
Vin (Max) (V) 57
Vout (Nom) (V) 5
Iout (Max) (A) 9
Output Power (W) 45
Isolated/Non-Isolated Isolated
Input Type DC
Topology Forward- Active Clamp
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDT385.PDF (3933 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement


Files used for 3D models or 2D drawings of IC components

TIDCGP3.ZIP (3364 K)

Design file that contains information on physical board layer of design PCB

TIDMCY9.PDF (3184 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Technical documentation

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Type Title Date
Test report Dual-Input Redundant PoE Class 6 PD With Smooth Transition and Telemetry Reference Design PDF | HTML May 21, 2024

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