TIDA-00905 Reference Design

Texas Instruments

Fluxgate Magnetic Current Sensing Reference Design with High Linearity for 3–Phase Inverters


The TIDA-00905 reference design provides a reference solution for accuracy: high linearity and the galvanic isolation required for current measurement in three phase inverters 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 a pseudo differential output with an option to connect to 3.3V or 5V ADCs. Hardware circuit for over current and ground fault detection enables over-current protection of power switches.

  • Designed to accurately measure three phase inverter currents up to 50ARMS (nominal) and 150A (maximum)200 kHz bandwidth: closed-loop current sensing using magnetic module and fluxgate sensor (DRV421) to enable low propagation delay in current measurementCalibrated current measurement accuracy of ±1% (typical) across temperature range from -25 °C to 85 °CHardware based overload and ground fault detection enables fast response for protection of power switches
  • 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
  • AC / DC Power Sources
  • Motor Brakes
  • Motor Overload Relays & Contactors
  • Servo Drive Energy Recovery
Product Categories
  • Sensing Products


Part Number Name Companion Part
TLC372 TLC372 Buy Datasheet

Bill Of Materials

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Test Data

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Other Documents

Title Updated Type Size (KB)
TIDA-00905 Gerber 20 Jul 2016 ZIP 379
TIDA-00905 CAD Files 20 Jul 2016 ZIP 3029
TIDA-00905 PCB 20 Jul 2016 PDF 3365
TIDA-00905 Assembly Drawing 20 Jul 2016 PDF 326
TIDA-00905 BOM 20 Jul 2016 PDF 91
TIDA-00905 Schematic and Block Diagram 20 Jul 2016 PDF 1216