Dual-output bias power supply reference design for inverter and motor drive applications


Design files


This isolated primary-side regulated (PSR) flyback converter reference design provides dual +15-V outputs at 100 mA each. It was designed to provide bias power for a rotor coil excitation gate driver in motor/ inverter applications. The isolated output voltage is sampled from the primary-side flyback voltage eliminating the need for an optocoupler, voltage reference or third winding from the transformer for output voltage regulation. It offers a high level of integration and high efficiency in a compact form factor.

  • Primary-side regulation eliminates optocoupler or transformer bias winding which results is a compact size
  • Excellent balanced load output voltage regulation (<1% from 10% - 100% loading)
  • Excellent unbalanced load output voltage regulation (<1% @ 50%, <2% @ 90% imbalance)
  • High efficiency (>90% from 50% - 100% loading)
  • LM5180 controller integrates FET and minimizes external components
Output voltage options PMP22760.1 PMP22760.2
Vin (Min) (V) 12 12
Vin (Max) (V) 15 15
Vout (Nom) (V) 15 15
Iout (Max) (A) .1 .1
Output Power (W) 1.5 1.5
Isolated/Non-Isolated Isolated Isolated
Input Type DC DC
Topology Flyback- Non Sync Flyback- Non Sync

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.

TIDT224.PDF (3255 K)

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

TIDM827.PDF (178 K)

Detailed schematic diagram for design layout and components

TIDM828.PDF (120 K)

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

TIDM829.PDF (139 K)

Detailed overview of design layout for component placement

TIDM831.ZIP (697 K)

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

TIDCG00.ZIP (519 K)

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

TIDM830.PDF (523 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

LM5180-Q1Automotive 65-VIN no-opto flyback converter with 100-V, 1.5-A integrated MOSFET

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Test report Dual-Output Bias Power Supply Reference Design for Inverter and Motor Drive Appl Mar. 24, 2021

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