TIDA-00914

Reinforced Isolated Phase Current Sense Reference Design with Small Delta Sigma Modulators

TIDA-00914

Design files

Overview

This reference design realizes a reinforced isolated 3-phase inverter sub-system using isolated IGBT gate drivers and isolated current/voltage sensors. Precise in-line shunt based motor phase current sensing is done with AMC1306E25 delta sigma modulators. The modulator output is Manchester-encoded which simplifies the clock and data signal routing between the MCU and modulators. High CMTI of the modulator helps suppress the inverter switching noise transients from corrupting the data on the controller side. The small size of the modulator enables a compact solution. The TIDA-00914 provides an interface to connect to an external MCU or FPGA where digital SINC filters can be implemented to demodulate the AMC1306E25 output bitstream. This reference design uses the F28379D delfino control card which is connected to the reference design card through an adapter card to implement SINC filters for current sensing.

Features
  • Simplified clock routing to delta sigma modulators due to Manchester-encoded data output
  • Small pin count (8) enables compact solution
  • High CMTI of modulator (>50 kV/us) improves noise immunity to switching transients
  • Short circuit response time of less than 1.5 µs
  • Calibrated full scale accuracy of <0.5% across temperature range of 0°C to 55°C
  • Nominal phase current measurement range of 28 Arms and peak measurement range of +/-80 Apk

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.

TIDUD07A.PDF (1855 K)

Reference design overview and verified performance test data

TIDRQQ3A.PDF (733 K)

Detailed schematic diagram for design layout and components

TIDRQQ4A.PDF (40 K)

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

TIDRQQ5.PDF (539 K)

Detailed overview of design layout for component placement

TIDRQQ7A.ZIP (1704 K)

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

TIDCDD6.ZIP (460 K)

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

TIDRQQ6.PDF (1968 K)

PCB layer plot file used for generating PCB design layout

Products

Includes TI products in the design and potential alternatives.

General-purpose op amps

TLV521Single, 5.5-V, 6-kHz, ultra-low quiescent current (350-nA), RRIO operational amplifier

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated ADCs

AMC1306E25Small Reinforced Isolated Modulator With ±250mV Input and Manchester-Encoded CMOS Interface

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated gate drivers

UCC53102-A/1-A, 3-kVRMS/5-kVRMS single-channel isolated gate driver with 12-V UVLO, Miller Clamp

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated gate drivers

UCC53202-A/2-A, 3-k/5-kVRMS single-channel isolated gate driver with 12-V UVLO, bipolar supply

Data sheet document-pdfAcrobat PDF open-in-new HTML
Isolated gate drivers

UCC539010-A/10-A, 3-k/5-kVRMS single-channel isolated gate driver with 12-V UVLO, bipolar supply

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

LM3480100-mA, 30-V, low-dropout voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TLV1117800-mA, 15-V, linear voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Linear & low-dropout (LDO) regulators

TLV704150-mA, 24-V, ultra-low-IQ, low-dropout voltage regulator

Data sheet document-pdfAcrobat PDF open-in-new HTML
Noninverting buffers & drivers

SN74LVC1G17Single 1.65-V to 5.5-V buffer with Schmitt-Trigger inputs

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
* Design guide Reinforced Isolated Phase Current Sense Ref Design With Small Delta-Sigma Mods (Rev. A) Apr. 20, 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
White paper 高精密度馬達驅動控制 推動產業升級 Feb. 20, 2019
White paper High precision in motor drive control enables industrial advances May 23, 2017
Application note How delta-sigma ADCs work, Part 1 (Rev. A) Sep. 19, 2016
Application note How delta-sigma ADCs work, Part 2 Nov. 09, 2011

Related design resources

Hardware development

DAUGHTER CARD
TMDSCNCD28379D F28379D controlCARD for C2000 Real time control development kits

Reference designs

REFERENCE DESIGN
TIDA-00195 Isolated IGBT Gate Driver Evaluation Platform for 3-Phase Inverter System Reference Design TIDA-00366 Reference design for reinforced isolation 3-phase inverter with current, voltage and temp protection

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