48V/500W Three-phase Inverter with Smart Gate Driver Reference Design for Servo Drives


Design files


Efficiency, protection, and integration are important design factors for compact DC-fed drives up to 60VDC. This reference design shows a three-phase inverter with nominal 48-V DC input and a 10-ARMS output current.  The 100-V intelligent three-phase gate driver DRV8350R with integrated buck converter and six 100-V NexFET™ power MOSFETs with ultra-low gate charge enable high efficiency of the power stage.  Using the internal protection features of the DRV8350R, the power stage is protected against overtemperature, overcurrent, and short-circuit between the motor terminals and motor terminals to ground. Precision phase current sensing is achieved using the INA240. The interface is a 3.3-V I/O to connect a host MCU like the C2000™ MCU for brushless AC motor control.

  • Three-phase inverter with 24-60VDC input and 10 Arms continuous phase current for servo drives
  • Very high peak efficiency (99.0%) eliminates need for heat sink or cooling fan
  • Smart three phase gate driver DRV8350R with on-chip hardware protection and integrated DC/DC buck for gate drive supply
  • Fully protected power stage: Shoot-through, over current, short circuit, under voltage, over temperature protection
  • Programmable gate driver source/sink currents from 50mA to 2A eases optimization of efficiency and EMI performance including VGS handshake and minimum dead-time insertion to avoid shoot-through
  • In-phase shunt measurement based (1mOhm) current sensing with INA240 high-common mode rejection zero-drift current sense amplifier
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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.

TIDUE60.PDF (7449 K)

Reference design overview and verified performance test data

TIDRX50.PDF (452 K)

Detailed schematic diagram for design layout and components

TIDRX51.PDF (65 K)

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

TIDRX52.PDF (446 K)

Detailed overview of design layout for component placement

TIDRX54.ZIP (3323 K)

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


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

TIDRX53.PDF (1858 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)

TPS621623V-17V 1A Step-Down Converters with DCS-Control™

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
Analog temperature sensors

TMP2351C analog temperature sensor, 10 mV/C

Data sheet: PDF | HTML
BLDC drivers

DRV8162105V max single half-bridge smart gate driver with STO functionality

Data sheet: PDF | HTML
BLDC drivers

DRV8350R102-V max 3-phase smart gate driver with buck regulator

Data sheet: PDF | HTML

CSD19532Q5B100-V, N channel NexFET™ power MOSFET, single SON 5 mm x 6 mm, 4.9 mOhm

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

LMZM2360136-V, 1-A Step-Down DC-DC Power Module in 3.8-mm × 3-mm Package

Data sheet: PDF | HTML
RS-485 & RS-422 transceivers

THVD15505-V RS-485 transceiver with ±18-kV IEC ESD protection

Data sheet: PDF | HTML
Shunt voltage references

TLV431B-Q1Automotive, low-voltage adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide 48-V, 500-W, Three-Phase Inverter With Smart Gate Driver Reference Design Sep. 25, 2018
E-book Ein Techniker-Leitfaden für Industrieroboter-Designs Mar. 25, 2020
E-book E-book: An engineer’s guide to industrial robot designs Feb. 12, 2020
Technical article Getting the most out of your power stage at the full temperature range – part 2 PDF | HTML Sep. 12, 2019
Technical article Getting the most out of your power stage at the full temperature range – part 1 PDF | HTML Jun. 07, 2019
Technical article Anything but discrete: How to simplify 48-V to 60-V DC-fed three-phase inverter de PDF | HTML Feb. 01, 2019

Related design resources

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Software development

CONTROLSUITE controlSUITE™ Software Suite: Software and Development Tools for C2000™ Microcontrollers

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