48V/16A small form factor three-phase GaN inverter reference design for integrated motor drives


Design files


This reference design demonstrates a high-power density 12V to 60V 3-phase power stage using three LMG2100R044 100V, 35A GaN half-bridges with integrated GaN FETs, driver and bootstrap diode specifically for motor-integrated servo drives and robotics applications.  
Accurate phase-current sensing is achieved through the IN241A current sense amplifier, DC-link and phase voltages are also measured allowing validation of advanced sensorless designs, such as the InstaSPIN-FOC™. The design offers a TI BoosterPack compatible 3.3-V I/O interface to connect to a C2000™ MCU LaunchPad™ development kit or Sitara™ microcontrollers for quick and easy performance evaluation of our GaN technology.

  • High efficiency (99.3% peak) at 40kHz PWM enables operation at 25C ambient and up to 16Arms continuous current without heatsink         
  • Small form factor GaN half-bridge power stage enables high power density and simplifies PCB layout
  • GaN half-bridge enables operation at higher PWM frequencies to help reduce DC-bus capacitor height while replacing electrolytics with ceramic capacitors
  • Zero reverse recovery losses reduce switch node oscillations         
  • Low dead time of 16.6ns minimize phase voltage distortions Precision phase current sense with ±33A range using 1-mΩ shunt and current sense amplifier with high PWM rejection 
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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.

TIDUF68.PDF (4513 K)

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

TIDMCO3.ZIP (4743 K)

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


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

TIDMCO2.PDF (2102 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

AC/DC & DC/DC converters (integrated FET)

LMR38010SIMPLE SWITCHER® 80-V, 1.0-A, 2.2-MHz step-down converter with 40-µA IQ

Data sheet: PDF | HTML
Analog current-sense amplifiers

INA241A-5-V to 110-V bidirectional ultraprecise current sense amplifier with enhanced PWM rejection

Data sheet: PDF | HTML
Analog current-sense amplifiers

INA310A-4-V to 110-V, 1.3-MHz, ultra-precise current-sense amplifier with comparator

Data sheet: PDF | HTML
Fixed-direction voltage translators

TXU0304Four-channel fixed multidirectional level shifter

Data sheet: PDF | HTML
Gallium nitride (GaN) power stages

LMG2100R044100-V 4.4-mΩ half-bridge GaN FET with integrated driver and protection

Data sheet: PDF | HTML
Power modules (integrated inductor)

TPSM828215.5-V input, 1-A step-down module with integrated inductor in 2 x 2.5 x 1.1-mm μSIP package

Data sheet: PDF | HTML
Series voltage references

REF33333.3-V, 30-ppm/°C drift, 3.9-µA, 3-pin SOT-23, 3-pin SC70, 8-pin UQFN voltage reference

Data sheet: PDF | HTML

TMP611%, 10-kΩ linear thermistor in 0402, 0603/0805 and through hole packages

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
Design guide 48V, 850W Small Form Factor Three-Phase GaN Inverter Reference Design for Motor Integrated Drives PDF | HTML Feb. 23, 2024

Related design resources

Hardware development

LAUNCHXL-F28P65X C2000™ real-time MCU F28P65x LaunchPad™ development kit

Software development

C2000WARE-MOTORCONTROL-SDK MotorControl software development kit (SDK) for C2000™ MCUs

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