What is high side current sensing?

Posted on by Muna Meyer

What is high side current sensing?

This single–supply, high–side, low–cost current sensing solution detects load current between 50mA and 1A and converters it to an output voltage from 0.25V to 5V. High–side sensing allows for the system to identify ground shorts and does not create a ground disturbance on the load.

What is the purpose of a current sense amplifier?

A current sense amplifier is a special purpose integrated circuit differential amplifier that is designed to sense the voltage developed across a current shunt and output a voltage proportional to the measured current.

What is shunt amplifier?

Current sense amplifiers (also called current shunt amplifiers) are special-purpose amplifiers that output a voltage proportional to the current flowing in a power rail. These amplifiers use specialized ESD structures that enable them to have this functionality.

What is a current-sense resistor?

A current sensing resistor is designed for low resistance so as to minimize power consumption. As a result, the calibrated resistance senses the current flowing through it in the form of a voltage drop which is detected and monitored by the control circuitry.

What is sense amplifier in SRAM?

Sense Amplifier. The sense amplifier is in charge of detecting what value is stored in an SRAM cell during a read cycle and displaying that value at the output. Since only one row of data is accessed during each read cycle, each column of cells within the SRAM array requires only one sense amplifier [3].

What is a current sense transformer?

Current Sense Transformers are designed to detect and measure current flow in an isolated conductor or a primary winding and produce a proportional alternating current in a secondary winding. The frequency range is 2 Hz to 1 MHz with a current rating of 125 mA to 4000 A.

How do you create a current sensing circuit?

The first approach is using a current sensor resistor, which is also called a shunt resistor or resistive shunt. This is a resistor of a small value (a few milliohms), highly precise, and of high power rating. Current sense resistors are used extensively in low power system that utilize less than 100A.

How do you sense current flow?

The most common way to measure current is to sense the voltage drop across a shunt or current-sense resistor. To achieve a highly accurate measurement of the current, you’ll need to examine the parametric values of both the resistor and current-sense amplifier.

What is Hall effect current sensor?

A hall effect current sensor allows non-contact detection of direct and alternating currents, using a hall element, a magnet-electric converting element. This minimizes power loss of the target current circuit and has a simple structure with high reliability.

What is a high side current sense amplifier?

Precision High Side Current Sense Amplifiers The LTC®6102 zero-drift high side current sense amplifier has the precision to resolve microamps from amps of load current. Its outstanding accuracy can be used to attain high precision with a lower value sense resistor, resulting in less power loss and heat dissipation in the sense element.

What is a precision current sense amplifier?

Thanks to highly accurate current measurements, precision current sense amplifiers offer a better efficiency and thermal performance. What is a current sense amplifier? A current sense amplifier is a differential amplifier providing an analog output voltage proportional to the current flowing into a load connected on its input.

How do I choose a current sense amplifier?

High-side configuration: Select the current sense amplifier depending of the max common mode voltage (V ICM) required by the application and its power supply (V CC ). Low-side configuration: Select a current sense amplifier that can work with a common mode voltage close to 0 volts.

Is there a comprehensive curriculum for current sense amplifiers?

Check out this comprehensive curriculum for current sense amplifiers. The series is comprised of short training videos that cover the basics of current sense amplifiers, tips for applications, debugging, key specs and more! Browse current and power measurement use cases.

What is high-side current sensing?

Posted on by Muna Meyer

What is high-side current sensing?

This single–supply, high–side, low–cost current sensing solution detects load current between 50mA and 1A and converters it to an output voltage from 0.25V to 5V. High–side sensing allows for the system to identify ground shorts and does not create a ground disturbance on the load.

What is high-side current?

1. High-side and low-side current sensing refers to the placement of the current-sense resistor: between the positive supply and the load, or between the load and ground.

What is current sensing circuit?

A current sensor circuit is a circuit that can measure the current flowing through it. Current sensor circuits are used extensively in systems such as battery management systems in order to detect the current to monitor for overcurrent, a short circuit, and the state of charge of the battery system.

What is difference between high-side and low-side current sensing?

Low-side sensing is desirable because the common-mode voltage is near ground, which allows for the use of single-supply, rail-to-rail input/output op amps. High-side sensing is desirable in that it directly monitors the current delivered by the supply, which allows for the detection of load shorts.

How do we sense current?

The most common way to measure current is to sense the voltage drop across a shunt or current-sense resistor. To achieve a highly accurate measurement of the current, you’ll need to examine the parametric values of both the resistor and current-sense amplifier.

What are the common methods of current sensing?

The 6 Current Sensing Methods are:

  • Current transducer (CT)
  • Hall element.
  • Rogowski coil.
  • CT using the zero-flux method.
  • Hall element using the zero-flux method.
  • Flux gate using the zero-flux method.

What is a current sense resistor?

A current sensing resistor is designed for low resistance so as to minimize power consumption. As a result, the calibrated resistance senses the current flowing through it in the form of a voltage drop which is detected and monitored by the control circuitry.

Why current sensing is required?

Current sensor based on Faraday’s Law These sensors provide an intrinsic electrical isolation between the current to be measured and the output signal, thus making these current sensing devices mandatory, where safety standards demand electrical isolation.

How do you measure current in a circuit?

A device called an ammeter is used to measure current. Some types of ammeter have a pointer on a dial, but most have a digital display. To measure the current flowing through a component in a circuit, you must connect the ammeter in series with it.

How do you determine the current sense resistor?

Selecting the value of current sensing resistor is based primarily on two factors– required accuracy at minimum load current, and power dissipation at maximum load current, and the associated size and cost.