mA-to-kA range current shunt sensor reference design

18th July 2018
Posted By : Enaie Azambuja
mA-to-kA range current shunt sensor reference design

Texas Instruments' reference design shows how to detect current from the mA-to-KA range using a busbar-type shunt resistor. The increasing demand of high-capacity batteries in electric vehicles (EVs) and hybrid electric vehicles (HEVs) drives the requirement for larger current spans and highly-accurate current sensors. Obtaining a good accuracy over three decades (mA to A, 1A to 100A, and 100A to 1000A) is quite challenging due to large amounts of noise in the system.

This design solves this problem by using a high-resolution analog-to-digital converter (ADC) and high-accuracy current shunt monitors from TI.

Features

  • Full-scale accuracy of:
  • 0.02% full-scale range (FSR) for < 20A and < 0.05% FSR for 20A to 1500A at 25°C
  • 0.1% FSR for < 20A and 0.25% FSR for 20A to 1500A at 50°C
  • Suitable for 50mA to 1500A range current measurement; configurable to varied current spans
  • High-side sensing and low-side sensing
  • Supports bi-directional current
  • Bi-directional current measurement: -1500A to +1500A

Discover more here.


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