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PMP23470

750 kHz flyback converter for 48V systems reference design

PMP23470

Design files

Overview

This reference design is an isolated high-frequency (750kHz) flyback converter with a 48V input and a 24V/0.7A output. A LM51561 provides control for the flyback converter and an ISOM8110 opto-emulator is used for feedback isolation.

Features
  • 750kHz switching frequency
  • ISOM8110 opto-emulator feedback isolation  
  • Wide bandwidth improves transient performance  
  • Higher reliability versus optocoupler
  • 48V input for industrial, Power over Ethernet (PoE), and telecom applications 
Output voltage options PMP23470.1
Vin (Min) (V) 42
Vin (Max) (V) 57
Vout (Nom) (V) 24
Iout (Max) (A) .7
Output Power (W) 16.8
Isolated/Non-Isolated Isolated
Input Type DC
Topology Flyback- DCM^Flyback- Non Sync
Communications equipment
Industrial
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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.

PDF | HTML
TIDT396.PDF (1801 K)

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

TIDMD12.PDF (260 K)

Detailed schematic diagram for design layout and components

TIDMD13.PDF (398 K)

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

TIDMD14.PDF (215 K)

Detailed overview of design layout for component placement

TIDMD16.ZIP (901 K)

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

TIDCGP8.ZIP (320 K)

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

TIDMD15.PDF (561 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)

LM515612.2MHz Wide Input Nonsynchronous Boost,SEPIC,Flyback Controller with Spread Spectrum

Data sheet: PDF | HTML
Opto-emulators

ISOM8110DC-input transistor-output single-channel opto-emulator with 100% to 155% CTR

Data sheet: PDF | HTML
Shunt voltage references

TL431LIAdjustable precision shunt regulator with optimized reference current (pin layout: KRA)

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Test report 750kHz Isolated Flyback Converter (24V, 0.7A) with Opto-emulator Reference Design PDF | HTML Jun. 13, 2024

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