36V-60V Input 12V/5A Highly Efficient Active Clamp Forward Reference Design


Design files


The PMP20742 reference design provides 12V at 5A (60W) from a 36V-60Vdc input with over 94% efficiency. This design uses the UCC2897A active clamp controller along with synchronous rectifiers to achieve very high efficiency.  Typical applications include Power Over Ethernet, Telecom, and Server systems.

  • High efficiency, over 94%
  • Low profile, 11.43 mm (0.45") maximum height
  • Self-driven synchronous rectifiers reduce cost and complexity
Output voltage options PMP20742.1
Vin (Min) (V) 36
Vin (Max) (V) 60
Vout (Nom) (V) 12
Iout (Max) (A) 5
Output Power (W) 60
Isolated/Non-Isolated Isolated
Input Type DC
Topology Forward- Active Clamp

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.

TIDUCZ1.PDF (2667 K)

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

TIDRQ64.PDF (326 K)

Detailed schematic diagram for design layout and components

TIDRQ65.PDF (71 K)

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

TIDRQ66.PDF (243 K)

Detailed overview of design layout for component placement

TIDRQ68.ZIP (744 K)

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

TIDRQ67.PDF (990 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Low-side drivers

UCC275114-A/8-A single-channel gate driver with 5-V UVLO, split outputs, and 13-ns Prop delay

Data sheet document-pdfAcrobat PDF open-in-new HTML
N-channel MOSFETs

CSD18537NQ5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 13 mOhm

Data sheet document-pdfAcrobat PDF open-in-new HTML
PWM controllers

UCC2897A110-V active clamp current mode PWM controller with P-channel clamp FET and line OV protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report PMP20742 Test Results Mar. 01, 2017

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