Reference Designs
Automotive Shunt-Based ±500A Precision Current Sensing Reference Design
Texas Instruments
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 sensingCompensated 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
Applications
- Pump
- eTurbo/charger
- Engine fan
- Powertrain current sensor
- Battery management system (BMS)
Product Categories
- Amplifiers