Current Sense Reference Design for High-Switching Transient Three-Phase Inverter for Servo Drives

(ACTIVE) TIDA-01455

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Key Document

Description

The TIDA-01455 is a reinforced isolated, in-line, shunt-based, precision-phase current sensing reference design for three-phase inverters. One of the challenges with GaN or SiC inverters at high PWM switching is accurate phase current sensing across the shunt in presence of noise due to the high PWM frequency and high common-mode voltage transients. This challenge is solved by an isolation technology rated for common-mode transient immunity (CMTI) of 50 kV/µs, differential shunt voltage sensing, and a precise delta-sigma modulator, which is present in the AMC1306 modulators. The design features an interface to the C2000™ Delfino™ to generate up to a 20-MHz clock signal and receive and decode the modulated bit stream from the AMC1306 in Manchester coded bit format.

Features
  • ±10-A current range With 5-mΩ shunt due to AMC1306E05 unique low input voltage range (±50 mV) allows significant reduction of power dissipation through shunt
  • Precision current sensing with accuracy better than ±0.25% (calibrated at 25°C) across temperature, tested with three-phase GaN inverter with high common-mode transients at 100-kHz switching frequency at 0°C, 25°C, and 55°C ambient
  • Exceeds IEC 61800-3 EMC immunity requirements for fast electrical transients IEC 61000-4-4, achieves criterion A at ±4-kV EFT
  • High CMTI of AMC1306 modulator (> 50 kV/μs) improves noise immunity to high switching transients
  • Reinforced isolated delta-sigma modulator AMC1306E05 with small package (SOIC-8) and Manchester encoded data to simplify layout
  • Short-circuit response time of < 1.5 μs with SINC3 filter and OSR of 8, protects fast switching inverters such as GaN inverters

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TI Devices (12)

Order samples, get tools and find more information on the TI products in this reference design.

Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
AMC1306E05  Small Reinforced Isolated Modulator With ±50mV Input and Manchester-Encoded CMOS Interface  Analog-to-Digital Converters (ADCs)  Sample & Buy View Design Kits & Evaluation Modules
CDCLVC1102  Low Jitter, 1:2 LVCMOS Fan-out Clock Buffer  Clock Buffers  Sample & Buy View Design Kits & Evaluation Modules
ISO3086T  Isolated 485 Transceiver with integrated transformer driver  Isolation  Sample & Buy View Design Kits & Evaluation Modules
ISO7831  High-Immunity, 5.7kVRMS Reinforced Triple-Channel 2/1 Digital Isolator, 100Mbps  Isolation  Sample & Buy View Design Kits & Evaluation Modules
LM3480  100 mA, SOT-23, Quasi Low-Dropout Linear Voltage Regulator  Linear Regulator (LDO)  Sample & Buy Not Available
LMG3410  600-V 12-A Single Channel GaN Power Stage  Gallium Nitride (GaN) Solutions  Sample & Buy View Design Kits & Evaluation Modules
SN74AHC1G08  Single 2-Input Positive-AND Gate  Logic  Sample & Buy Not Available
SN74LVC1G11  Single 3-Input Positive-AND Gate  Logic  Sample & Buy View Design Kits & Evaluation Modules
SN74LVC245A  Octal Bus Transceiver With 3-State Outputs  Buffer/Driver/Transceiver  Sample & Buy Not Available
SN74LVC2G17  Dual Schmitt-Trigger Buffer  Logic  Sample & Buy Not Available
TLV1117  Single Output LDO, 800mA, Fixed and Adj., Internal Current limit, Thermal Overload Protection  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules
TPS763  Low Iq, 150-mA, Low-Dropout Linear Regulators  Linear Regulator (LDO)  Sample & Buy View Design Kits & Evaluation Modules

Technical Documents

View the Important Notice for TI Designs covering authorized use, intellectual property matters and disclaimers.

Application notes (2)
Title Abstract Type Size (KB) Date Views
PDF 666 19 Sep 2016 6,452
PDF 136 09 Nov 2011 637
User guides (1)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 4013 19 Sep 2017 200
White papers (1)
Title Abstract Type Size (KB) Date Views
PDF 607 23 May 2017 2,373
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 859 19 Sep 2017 31
ZIP 7473 19 Sep 2017 58
ZIP 2999 19 Sep 2017 41
ZIP 434 19 Sep 2017 40
ZIP 140 19 Sep 2017 46
ZIP 875 19 Sep 2017 170
Related Tools & Software

Reference Designs (3)

Design Kits & Evaluation Modules (1)

Name Part Number Tool Type
F28379D controlCARD for C2000 Real time control development kits  TMDSCNCD28379D  Development Kits 


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