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.
A fully assembled board has been developed for testing and performance validation only, and is not available for sale.
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Reference design overview and verified performance test data
Detailed schematic diagram for design layout and components
Complete listing of design components, reference designators, and manufacturers/part numbers
Detailed overview of design layout for component placement
Files used for 3D models or 2D drawings of IC components
Design file that contains information on physical board layer of design PCB
PCB layer plot file used for generating PCB design layout
Includes TI products in the design and potential alternatives.
| 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 | PDF | HTML | Sep. 18, 2017 | |
| White paper | GaN power module performance advantage in DC/DC converters | Mar. 02, 2015 |
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