IPM Interface Reference Design for Inverters Using Single Package Six Channel Digital Isolator


Design files


This reference design realizes a three-phase inverter subsystem for AC inverter drives and servo drives using an intelligent power module (IPM). Reinforced isolation is present between the microcontroller (MCU) and the IPM-based power stage. The PWM signals are isolated using the single-package, six-channel digital isolator, ISO7760. In-phase current sensing is done in two motor phases using the isolated delta-sigma modulator, AMC1303M0520. DC bus voltage feedback and module temperature feedback is provided to the MCU through isolated delta-sigma modulators, AMC1303M2520. This reference design is controlled by a C2000™ MCU.

  • Power stage suited for 200-V to 480-V AC drives with continuous current rating up to 5 Arms and peak current rating of 10 Apk using a 1200-V, 15-A IPM
  • Reinforced isolation between controller and power stage
  • Single-package reinforced isolator ISO7760 for six PWM signals reduces BOM count and PCB footprint when compared to multiple optoisolators
  • Excellent propagation delay matching of isolator channels allows for smaller dead time, resulting in reduced inverter output distortions and better efficiency
  • PWM isolator with very low current consumption and self heating allows powering from 15-V IPM supply with small footprint LDO
  • IEC61800-3 EMC immunity for EFT up to 4 kV on motor power cable
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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.

TIDUDO8.PDF (2418 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

TIDRVI6.ZIP (2489 K)

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

TIDCEH2.ZIP (1058 K)

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

TIDRVI5.ZIP (1048 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Digital isolators

ISO7760Robust EMC, six-channel, 6/0, reinforced digital isolator

Data sheet: PDF | HTML
Isolated ADCs

AMC1303M0520±50-mV input, precision current sensing reinforced isolated modulator with 20-MHz int clock

Data sheet: PDF | HTML
Isolated ADCs

AMC1303M2520±250-mV input, precision current sensing reinforced isolated modulator with 20-MHz int clock

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

TLV760100-mA, 30-V, low-dropout voltage regulator

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

TPS706150-mA, ultra-low-IQ, low-dropout voltage regulator with reverse current protection & enable

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

TPS7A420150-mA, 28-V, low-IQ, adjustable low-dropout voltage regulator with enable

Data sheet: PDF | HTML

Technical documentation

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Type Title Date
* Design guide IPM Ref Design for Inverters Using Single-Package Six-Channel Digital Isolator Jan. 29, 2018

Related design resources

Hardware development

TMDSCNCD28379D F28379D development kit for C2000™ Delfino MCU controlCARD™

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