Isolated IGBT gate-drive power supply reference design with integrated switch PSR flyback controller


Design files


This reference design provides isolated positive and negative voltage rails for Insulated  Gate Bipolar Transistor (IGBT) gate drivers from a 24-V DC input supply. It uses a flyback power supply topology to generate four pairs of 15-V and –5-V outputs suitable for powering six IGBT gate drivers of 1 W each. The integration of a 100-V rated primary-side switch within the LM5180 flyback converter together with the elimination of an auxiliary transformer winding enables a compact solution.

  • Quasi-resonant boundary conduction mode along with frequency modulation provides peak efficiency of 90% at balanced full load
  • Supplies output power up to 1.2 W per IGBT driver
  • Provides compact and cost-effective solution due to elimination of opto-coupler and transformer auxiliary winding
  • Provision to turn the power supply on and off through the EN pin
  • Programmable soft start limits the inrush current drawn by the power supply

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.

TIDUEA3.PDF (8392 K)

Reference design overview and verified performance test data

TIDRX55B.PDF (251 K)

Detailed schematic diagram for design layout and components


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

TIDRX57A.PDF (227 K)

Detailed overview of design layout for component placement

TIDRX59A.ZIP (2528 K)

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


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

TIDRX58A.PDF (686 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Isolated DC/DC converters & modules

LM2518042-Vin no-opto flyback converter with 65-V, 1.5-A integrated MOSFET

Data sheet: PDF | HTML
Isolated DC/DC converters & modules

LM518065-VIN no-opto flyback converter with 100-V, 1.5-A integrated MOSFET

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide Isolated IGBT Gate-Drive Power Supply Reference Design With Integrated Switch Sep. 27, 2018
More literature Isolated Power Topologies for PLC I/O Modules and Other Low-Power Applications PDF | HTML Nov. 09, 2022

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