TIDA-00907 Reference Design

Texas Instruments

Closed Loop Integrated Fluxgate-Based Current Measurement Reference Design with Bit Stream Output

Description

The TIDA-00907 reference design provides a reference solution for accurately measuring three phase inverter currents using Closed-loop Fluxgate magnetic current sensors. It consists of magnetic core with compensation winding interfaced to driver IC with built-in Fluxgate sensor. The design provides bit-stream output using non-isolated delta-sigma modulators with an option to connect to 3.3V or 5V microcontrollers for Digital Filtering. Use of delta-sigma modulators enable customized filtering for control algorithm and over-current protection of power switches.  

Features
  • Designed to accurately measure three phase inverter currents up to 50Arms (nominal) and 150A (max)Closed-Loop Current Sensing using Magnetic Module: 200kHz Bandwidth Fluzgate Sensor (DRV421) and Delta-Sigma Modulator (ADS1203) Enables Customized Filtering for Control AlgorithmCalibrated Current Measurement Accuracy of ±0.8% (typical) Across Temperature Range from -25 °C to 85 °CIntegrated Overload Detection Enables Direct Interface to MicrocontrollerTested Design with Hardware-Based Sinc Filter Available in Delfino MicrocontrollerOption for Level-Translated Bit-Stream Output to Interface with 3.3V or 5V Controllers
Applications
  • String Inverters
  • AC Drive Power Stage Module
  • Micro Inverters
  • Injection Molding Machines
  • AC Charging (Pile) Station
  • AC Drive Energy Recovery
  • Servo Drive Power Stage Module
  • Brushless DC Motor Drives
  • Motor Brakes
  • Motor Overload Relays & Contactors
  • Servo Drive Energy Recovery
Product Categories
  • Data Converters

Parts

Part Number Name Companion Part
ADS1203 ADS1203 Buy Datasheet

Bill Of Materials

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Schematic

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00907 Gerber 16 May 2016 ZIP 1826
TIDA-00907 CAD Files 16 May 2016 ZIP 5678
TIDA-00907 Layer Plots 16 May 2016 ZIP 1239
TIDA-00907 Assembly Files 16 May 2016 ZIP 320
TIDA-00907 BOM Files 16 May 2016 ZIP 90
TIDA-00907 Schematic Files 16 May 2016 ZIP 797