Class 4- 3.3V/7.6A Active Clamp Forward Converter Reference Design for PoE Applications


Design files


This converter reference design is used for Class 4 PoE applications where high efficiency is required. The active clamp forward converter with synchronous rectifiers provides excellent efficiency and small size for PoE applications such as a wireless access point. The TPS23754 contains both the PoE Powered Device and the PWM controller functions.

  • High efficiency(90%)
  • 3.3V at 7.6A output
  • Isolated Forward with synchornous rectifier
  • Uses TPS23754 high-power, high-efficiency PoE interface PD and PWM controller
  • Small size solution
  • This circuit design is full-functional tested and recommended for new designs
Output voltage options PMP7452.1
Vin (Min) (V) 36
Vin (Max) (V) 57
Vout (Nom) (V) 3.3
Iout (Max) (A) 7.6
Output Power (W) 25.08
Isolated/Non-Isolated Isolated
Input Type DC
Topology Forward- Active Clamp^POE
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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.

SLVU848.PDF (452 K)

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

SLVRB25.PDF (51 K)

Detailed schematic diagram for design layout and components

SLVRB24.PDF (136 K)

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

TIDR627.ZIP (11 K)

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

TIDC428.ZIP (239 K)

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


Includes TI products in the design and potential alternatives.

N-channel MOSFETs

CSD17510Q5A30-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 5.2 mOhm

Data sheet: PDF
Powered devices

TPS23754IEEE 802.3at, high efficiency, PoE interface and DC/DC controller

Data sheet: PDF | HTML
Shunt voltage references

TLV4311.5% accuracy, low-voltage, adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP7452 Test Results Jan. 18, 2013

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