36V-72V Input 2.5V/5A Active Clamp Forward; 1/16 Brick


Design files


The PMP6886 reference design provides 2.5V at 5A from a standard 48V telecom input with greater than 88% efficiency. This design uses the UCC2897A active clamp controller along with TI NexFET synchronous rectifiers. The low gate thresholds of the CSD16323Q3 and CSD16406Q3 allow them to be driven directly from the transformer windings. The circuit is built in an industry standard 1/16 brick footprint. Auxilliary features of this design include remote sense, output over-voltage protection, output voltage trim and primary side enable control.

Output voltage options PMP6886.1
Vin (Min) (V) 36
Vin (Max) (V) 72
Vout (Nom) (V) 2.5
Iout (Max) (A) 5
Output Power (W) 12.5
Isolated/Non-Isolated Isolated
Input Type DC
Topology Forward- Active Clamp^Forward- Synchronous

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.

SLUU700.PDF (4386 K)

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

SLUR580.PDF (86 K)

Detailed schematic diagram for design layout and components

SLUR581.PDF (31 K)

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

SLUC299.ZIP (3421 K)

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

SLUU701.PDF (307 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

N-channel MOSFETs

CSD16323Q325-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 5.5 mOhm

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

CSD16406Q325-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 7.4 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

Technical documentation

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Type Title Date
Technical article Power Tips: How to Regulate a Low-Voltage, Isolated Supply Jan. 16, 2014
Technical article Power Tips: How to be discrete Sep. 17, 2013
Test report PMP6886 Test Results Oct. 19, 2011

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