Saturday, June 22, 2024

Bi-directional Current-Sense Amplifiers Boost Power Efficiency

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Also gives overcurrent protection, current monitoring and bi-directional current measuring for many industrial and automotive systems

To minimise power dissipation and maximise energy savings, here’s presenting three precision high-voltage bi-directional current-sense amplifiers: the TSC2010, TSC2011, and TSC2012 amplifiers that offer selection of low sense-resistor values and a Shutdown pin.

The offset voltage is within ±200µV at 25 degrees Celsius, with less than 5µV/°C drift and gain accuracy of within 0.3%, enabling the devices to detect a voltage drop as low as 10mV full-scale to provide consistent measurements. They have a wide supply voltage range from 2.7V to 5.5V and input-voltage tolerance, allowing sensing over a range of common-mode voltages from -20V to 70V at any supply voltage. With high gain-bandwidth product and fast slew rate — 820kHz and 7.5V/µs in the TSC2010 — they ensure high accuracy and fast response.

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The gain variety — 20V/V for the TSC2010, 60V/V for the TSC2011 and 100V/V for the TSC2012 shows flexibility to build precision current measurement, overcurrent protection, current monitoring and current-feedback circuits for many industrial and automotive systems. Uses include data acquisition, motor control, solenoid control, instrumentation, test and measurement, and process control.

Effortlessly senses current flow

The bi-directional current measuring capability of the devices allows a single sensing circuit to measure current flow in forward and reverse directions, thereby reducing bill of materials.

The devices are also suitable for high-side and low-side connection for use in both configurations for easier inventory management.

An integrated EMI filter and 2kV Human Body Model (HBM) ESD tolerance ensure robust performance and operation over the industrial temperature range -40 degrees Celsius to 125 degrees Celsius.

Designers can accelerate time to market by leveraging the STEVAL-AETKT1V2 evaluation kit for a fast start to projects using any of the three devices.

The TSC2010, TSC2011, and TSC2012 are available now from STMicroelectronics in Mini-SO8 and SO8 packages. 


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