By forming a closed-loop solenoid control with high-accuracy current sensors, the designer is able to control the proportional olenoid in a precise manner. This order of control implies that highaccuracy current sensors are critical to achieve precise control of solenoids.
Some of the main aspects to consider when selecting a current sensor are less offset, less drift, and higher pulse-width-modulation (PWM) rejection ration. By combining the above three features, this reference design shows a way to precisely measure the current flowing through the solenoid using TI’s current shunt monitoring portfolio.
Features
- Uncalibrated accuracy: less than 1% for more than 10mA over temperature (–40°C to 125°C)
- Suitable for various solenoid current ranges
- Low drift, high precision
- High-side drive, high-side solenoid monitor
- Enhanced PWM rejection facilitates uniform current profile
- Lowers blanking time and enables accurate measurements at lower duty cycle
Discover more here.
