48V 3-Phase Inverter with Shunt-based In-line Motor Phase Current Sensing Reference Design


Design files


The TIDA-00913 reference design realizes a 48V/10A 3-phase GaN inverter with precision in-line shunt-based phase current sensing for accurate control of precision drives such as servo drives. One of the largest challenges with in-line shunt-based phase current sensing is the high common-mode voltage transients during PWM switching. The INA240 bi-directional current-sense amplifier overcomes this problem using enhanced PWM rejection. The reference design provides an output voltage from 0 to 3.3V, scaled to ±16.5A with 1.65V mid voltage for high phase-current accuracy over the entire temperature range. The TIDA-00913 offers a TI BoosterPack compatible interface to connect to a C2000 MCU LaunchPad™ development kit for easy performance evaluation.

  • Wide input voltage range 12V to 60V 3-phase GaN inverter with 7Arms output current per phase and non-isolated phase current sensing.
  • Precision in-line phase current sensing with 5mΩ shunt, ±16.5A full scale range and ±10A nominal range.
  • High accuracy phase current sensing over the temperature range from -25°C to 85°C. Uncalibrated accuracy <±0.5%; calibrated accuracy <±0.1%.
  • System cost reduction using a non-isolated current sense amplifier INA240 with superior AC common mode rejection operating up to PWM switching frequencies up to 100kHz.
  • Reduced BOM and easy layout due to the INA240 bi-directional, zero-drift current sense amplifier that directly interfaces to a 3.3V ADC.
  • TI BoosterPack compatible interface with 3.3V I/O for easy performance evaluation with a C2000 MCU LaunchPad™ development kit.
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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.


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

TIDROK1.ZIP (5637 K)

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

TIDCCV2.ZIP (1217 K)

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

TIDROK0.PDF (2813 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)

LM50187.5-100V Wide Vin, 300mA Constant On-Time Synchronous Buck Regulator

Data sheet: PDF | HTML
Analog current-sense amplifiers

INA240-4 to 80V, bidirectional, ultra-precise current sense amplifier with enhanced PWM rejection

Data sheet: PDF | HTML
Direction-controlled voltage translators

SN74AVC8T2458-Bit Dual-Supply Bus Transceiver with Configurable Voltage-Level Shifting and 3-State Outputs

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

LMG520080V GaN Half Bridge Power Stage

Data sheet: PDF | HTML
Linear & low-dropout (LDO) regulators

LP38691500-mA, 10-V, low-dropout voltage regulator

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
Temperature switches

TMP302-Q1Automotive, Pin-Selectable Trip Point 1.4V-Capable Family of Temperature Switches

Data sheet: PDF | HTML

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Technical documentation

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Type Title Date
* Design guide 48V 3Phase Inverter w/ Shunt-Based In-Line Motor Phase Current Sense Ref Design (Rev. A) Apr. 07, 2017
Selection guide Current Sense Amplifiers (Rev. E) Sep. 20, 2021
White paper Machine Learning Powers Autonomous Industrial Systems (Rev. A) Jun. 17, 2020
Technical article GaN reliability standards reach milestone PDF | HTML Sep. 18, 2017
White paper Enabling robots to achieve new levels of factory automation Mar. 21, 2017
Technical article Five benefits of enhanced PWM rejection for in-line motor control PDF | HTML Nov. 08, 2016
Technical article What’s next for Industry 4.0? The best new technologies shaping the future of smar PDF | HTML Nov. 07, 2016

Related design resources

Hardware development

LAUNCHXL-F28069M F28069M LaunchPad™ development kit for C2000™ Piccolo™ MCU
BOOSTXL-3PHGANINV 48-V Three-Phase Inverter With Shunt-Based In-Line Motor Phase Current Sensing Evaluation Module

Reference designs

TIDA-00909 48V/10A High Frequency PWM 3-Phase GaN Inverter Reference Design for High-Speed Drives

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