PMP30487

Inverting SEPIC reference design for noise sensitive loads

PMP30487

Design files

Overview

This reference design is an inverting SEPIC (Cuk) Converter powering 50-W continuous and up to 70-W peak. The used Cuk topology provides continuous currents at input and output, which allows the lowest conducted emissions in both directions.  Compared to an inverting flyback radiated emissions are low as well due to no RF ringing at the switch node.

Features
  • Best EMI behavior compared to inverting buck boost or inverting flyback
  • A high full load efficiency of 94%
  • Transient response is better than 1% for 50% load range
  • Output voltage is regulated very tight over the whole input voltage range (28 V to 42 V)
  • Load regulation is tight over the whole output current range
  • UVLO functionality is integrated
Output voltage options PMP30487.1
Vin (Min) (V) 28
Vin (Max) (V) 42
Vout (Nom) (V) -36
Iout (Max) (A) 2
Output Power (W) 72
Isolated/Non-Isolated Non-Isolated
Input Type DC
Topology Other
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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.

TIDT024.PDF (4037 K)

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

TIDRXX1.PDF (107 K)

Detailed schematic diagram for design layout and components

TIDRXX3.PDF (158 K)

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

TIDRXX4.PDF (96 K)

Detailed overview of design layout for component placement

TIDRXX6.ZIP (553 K)

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

TIDCF25.ZIP (23 K)

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

TIDRXX5.PDF (467 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AC/DC & DC/DC controllers (external FET)

LM50226-60V Wide Vin, current mode boost, SEPIC and Flyback controller

Data sheet: PDF | HTML
General-purpose op amps

TLV271Single, 16-V, 3-MHz operational amplifier

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Test report Inverting SEPIC Reference Design for Noise Sensitive Loads Dec. 07, 2018

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