IPM Interface Reference Design for Inverters Using Single Package Six Channel Digital Isolator
TIDA-01349
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
See the Important Notice and Disclaimer covering reference designs and other TI resources.
Key Document
- IPM Ref Design for Inverters Using Single-Package Six-Channel Digital Isolator
(PDF 2418 KB)
29 Jan 2018
Description
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.
Features
- 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
See the Important Notice and Disclaimer covering reference designs and other TI resources.
