PMP5123

8V-36V Input 12V/7A; Active Clamp Forward Reference Design

PMP5123

Design files

Overview

This reference design generates an isolated 12V/7A output from an 8V to 36V DC input.  The UCC2897A controls an active clamp forward converter power stage.  The low gate charge and low RDSon of the CSD19533Q5A and CSD19534Q5A allow this design to achieve a max load efficiency over 93%, with a peak efficiency of over 94%.  The compact UCC27511 drivers simplify the gate drive circuitry for the synchronous rectifiers.

Features
  • High Efficiency (over 94% peak)
  • Low profile, less than 0.5 inches (12.5mm) max component height
  • Self-driven synchronous rectifiers reduce drive complexity
Output voltage options PMP5123.1
Vin (Min) (V) 8
Vin (Max) (V) 36
Vout (Nom) (V) 12
Iout (Max) (A) 7
Output Power (W) 84
Isolated/Non-Isolated Isolated
Input Type DC
Topology Forward- Active Clamp^Forward- Synchronous
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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.

SLUU822A.PDF (2834 K)

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

SLUR783A.PDF (179 K)

Detailed schematic diagram for design layout and components

SLUR784A.PDF (81 K)

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

TIDRCH5A.PDF (84 K)

Detailed overview of design layout for component placement

TIDRCH6A.PDF (431 K)

PCB layer plot file used for generating PCB design layout

Products

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: PDF | HTML
N-channel MOSFETs

CSD19533Q5A100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 9.5 mOhm

Data sheet: PDF | HTML
N-channel MOSFETs

CSD19534Q5A100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 15.1 mOhm

Data sheet: PDF | HTML
PWM controllers

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

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report PMP5123 Test Results (Rev. A) Jun. 03, 2015

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