TIDA-00915

Three-phase, 1.25-kW, 200-VAC small form factor GaN inverter reference design for integrated drives

TIDA-00915

Design files

Overview

This reference design is a three-phase inverter with a continuous power rating of 1.25 kW at 50°C ambient and 550 W at 85°C ambient for driving 200-V AC servo motors. It features 600-V LMG3411R150 Gallium Nitride (GaN) power modules with an integrated FET and gate driver mounted on an 1.95-mm Insulated Metal Substrate (IMS) board for efficient heat dissipation. Isolation and control circuits are mounted on separate FR-4 boards - the dimensions of the design are 80 mm × 46 mm × 37 mm, including heatsink, control, isolation, and power stage. This ultra-small form factor, coupled with the ability to be natural convection fanless cooled, allows for easy integration of the drive with the motor, reducing the required cabinet space by up to 50% and cable lengths by up to 90 m in 6-axis motor applications including robotics, CNC machines, and so forth.

Features
  • 600 V, 6-A LMG3411R150 GaN enables a power density of 150 W/in3 in 50°C ambient conditions up to 1.25 kW and in 85°C ambient conditions up to 550 W
  • Ultra-small form factor and natural convection fanless cooling allows easy integration of the drive with the motor-saving floor space and cabling costs
  • Very fast switching transition (<5 ns) with minimal switch node voltage ringing reduces EMI
  • High-efficiency power stage (peak efficiency >99% at 32-kHz PWM) reduces heat-sink size
  • Protection against gate undervoltage, device overcurrent, and overtemperature

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.

TIDUCM9A.PDF (7936 K)

Reference design overview and verified performance test data

TIDRQU3A.ZIP (695 K)

Detailed schematic diagram for design layout and components

TIDRQU4A.ZIP (125 K)

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

TIDRQU5A.ZIP (320 K)

Detailed overview of design layout for component placement

TIDRQU7A.ZIP (2682 K)

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

TIDCDE8A.ZIP (1498 K)

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

TIDRQU6A.ZIP (1663 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

AND gates

SN74AHC1G08Single 2-input, 2-V to 5.5-V AND gate

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

SN74LVC1G11Single 3-input, 1.65-V to 5.5-V AND gate

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

ISO7721Robust EMC, dual-channel, 1/1, reinforced digital isolator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Gallium nitride (GaN) ICs

LMG3411R150600-V 150-mΩ GaN with integrated driver and cycle-by-cycle overcurrent protection

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TLV1117800-mA, 15-V, linear voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

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

Technical documentation

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Type Title Date
* Application note Thermal Comparison of FR-4 and Insulated Metal Substrate PCB for GaN Inverter Jun. 24, 2019
* Design guide Three-phase, 1.25-kW, 200-VAC small form factor GaN inverter reference design (Rev. A) Mar. 15, 2019
Application note Designing With the Improved TL431LI (Rev. A) Jun. 28, 2019
Application note High Voltage Half Bridge Design Guide for LMG3410 Smart GaN FET (Rev. A) Nov. 10, 2018
Technical article GaN reliability standards reach milestone Sep. 18, 2017
White paper GaN power module performance advantage in DC/DC converters Mar. 02, 2015

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TIDA-00195 Isolated IGBT Gate Driver Evaluation Platform for 3-Phase Inverter System Reference Design TIDA-00366 Reference design for reinforced isolation 3-phase inverter with current, voltage and temp protection

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