Automotive Shunt-Based ±500A Precision Current Sensing Reference Design

(ACTIVE) TIDA-03040

Description & Features

Technical Documents

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Key Document

Description

This shunt-based current sensor reference design provides an accuracy of < 0.2% FSR over a temperature range of -40°C to +125°C. Precision current sensing is essential in a number of automotive applications, including battery management systems, motor currents, and others. Generally, nonlinearity, temperature drift, shunt tolerances in these locations can cause poor accuracy results. This design solves these problems by using TI’s current shunt monitors and signal conditioners (INA240, PGA400-Q1).

Features
  • Accuracy of 0.2% FSR, over temperature (-40°C to 125°C)
  • Suitable for ±500A, high/low-side current sensing
  • Compensated for temperature and non-linearity (second order temperature and linearity compensation algorithm)
  • Protection against harness faults (overvoltage, reverse polarity, input/output signal protection)
  • Electromagnetic interference (EMI) protection

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


  




TI Devices (3)

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
INA240  High/Low Side, Bi-Directional Zero-Drift Current Sense Amp w/ Enhanced PWM Rejection  Current Sense Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
PGA400-Q1  Automotive Catalog Programmable Sensor Signal Conditioner w/ Microcontroller  Capacitive Sensing  Sample & Buy View Design Kits & Evaluation Modules
TPS709-Q1  150-mA, 30-V, Ultra-Low IQ, Wide Input LDO with Reverse Current Protection for Automotive  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.

User guides (3)
Title Abstract Type Size (KB) Date Views TI Recommends
PDF 1510 07 Jul 2017 1,933
PDF 3364 27 Mar 2017 2,594
PDF 612 30 Jun 2015 1,921
Design files (6)
Title Abstract Type Size (KB) Date Views
ZIP 433 28 Feb 2017 74
ZIP 452 28 Feb 2017 263
PDF 895 28 Feb 2017 170
PDF 152 28 Feb 2017 149
PDF 68 28 Feb 2017 292
PDF 491 28 Feb 2017 1,690


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