PMP8861

18-72VDC Input, 12V/120W Active Clamp Forward Reference Design

PMP8861

Design files

Overview

This reference design generates a 12V/10A output from a wide range 18V to 72V telecom input. The UCC2897A controls an active clamp forward converter power stage. The low gate charge and low RDSon of the CSD18533Q5A, implemented as a synchronous rectifier, provides for a highly efficient design. This design is laid out in a standard quarter brick footprint and achieves efficiencies near 95%.

Features
  • High efficiency ~95% peak
  • Footprint compatible with standard 1/4 brick
  • Self-driven synchronous rectifiers reduce drive complexity
  • Lower cost solution compared to modules
Output voltage options PMP8861.1
Vin (Min) (V) 18
Vin (Max) (V) 72
Vout (Nom) (V) 12
Iout (Max) (A) 10
Output Power (W) 120
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.

SLUUAM2A.PDF (3023 K)

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

SLURAE0A.PDF (155 K)

Detailed schematic diagram for design layout and components

SLURAE1A.PDF (100 K)

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

TIDRTA7.PDF (142 K)

Detailed overview of design layout for component placement

TIDRTA9.ZIP (618 K)

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

TIDCDY5.ZIP (207 K)

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

TIDRTA8.PDF (672 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

N-channel MOSFETs

CSD18533Q5A60-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 5.9 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
Test report PMP8861 Test Results (Rev. A) Nov. 03, 2017
Technical article Power Tips: How to be discrete Sep. 17, 2013

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