36Vdc-75Vdc Input, 6V @ 20A Output, Active Clamp Forward


Design files


The PMP4123 reference design provides 6V at 120W from a standard 48V telecom input with greater than 94% efficiency. This design uses the UCC2897A active clamp controller along with an ISO721 digital isolator and TPS28225 to drive synchronous rectifiers. The circuit is built in an industry standard quarter-brick footprint.

Output voltage options PMP4123.1
Vin (Min) (V) 36
Vin (Max) (V) 75
Vout (Nom) (V) 6
Iout (Max) (A) 20
Output Power (W) 120
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.

SLUU952.PDF (916 K)

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

SLUR894.PDF (101 K)

Detailed schematic diagram for design layout and components

SLUR895.PDF (30 K)

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

SLUC360.ZIP (165 K)

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

SLUU953.PDF (139 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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
Digital isolators

ISO721Single-channel, 100-Mbps digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Half-bridge drivers

TPS282254-A, 27-V half bridge gate driver with 4-V UVLO for synchronous rectification

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

Technical documentation

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Type Title Date
Test report PMP4123 Test Results May 10, 2012

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