In-phase current-sense reference design for 230-VAC motor drives using hall-effect current sensors


Design files


This reference design features the Hall-effect current sensor, TMCS1100, that can measure currents with an absolute error of < 1% (–40 to 125°C) and provide a working isolation voltage of up to 600 V. The low-resistance in-package current sensing element and lack of need for high-side power supply enable a compact and efficient current sensing solution for precise motor torque, speed, or position control. The inverter power stage is comprised of 600-V LMG3411 Gallium Nitride (GaN) power modules enabling further size reduction and efficiency improvement for the next-generation of motor drives. 

  • Accurate current sense (< 1% absolute error) enables precise motor control.
  • Accuracy stability over a wide temperature range eliminates the need for external offset or drift compensation.
  • In-package sense element, and a lack of need for high-side power supply enable a small footprint, low-cost current-sense system.
  • Efficient and compact inverter power stage is based on 600-V LMG3411 GaN power modules with integrated gate under-voltage, device overcurrent, and over-temperature protection.
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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.

TIDUEQ0.PDF (1968 K)

Reference design overview and verified performance test data

TIDM351.ZIP (721 K)

Detailed schematic diagram for design layout and components

TIDM352.ZIP (128 K)

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

TIDM353.ZIP (342 K)

Detailed overview of design layout for component placement

TIDM355.ZIP (3911 K)

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

TIDM356.ZIP (1465 K)

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

TIDM354.ZIP (1850 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Hall-effect current sensors

TMCS1100±600V basic isolation, 20Arms 80kHz Hall-effect current sensor with external reference

Data sheet: PDF | HTML
Digital isolators

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

Data sheet: PDF | HTML
Gallium nitride (GaN) ICs

LMG3411R050600-V 50mΩ GaN with integrated driver and cycle-by-cycle overcurrent protection

Data sheet: PDF | HTML
General-purpose op amps

TLV9001One-channel, 1-MHz rail-to-rail input and output 1.8-V to 5.5-V operational amplifier

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

TLV1117800-mA, 15-V, linear voltage regulator

Data sheet: PDF | HTML
Series voltage references

REF20303-V Vref, low-drift, low-power, dual-output Vref & Vref/2 voltage reference

Data sheet: PDF | HTML
Shunt voltage references

TL431Adjustable precision shunt regulator

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide In-Phase Current-Sense Reference Design for 230-VAC Motor Drives Using Hall-Effe Dec. 03, 2019

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