Contents
How is the value of a shunt resistor determined?
Because the value will determine how much voltage will drop during the flow of current. The value can be determined from the current sense amplifier perspective. Depending on the maximum current flow and the maximum input voltage of the current sense amplifier, the value of the shunt resistor can be chosen.
Can a shunt resistor be used in a differential amplifier?
Connecting shunt resistors to differential amplifier circuits In principal, a current detection circuit using a shunt resistor is a simple circuit that only measures voltage. However, since the voltage drop of the shunt resistor is small, it’s necessary to make a circuit that can amplify the voltage with a high level of accuracy.
What does shunt mean in current sense amplifier?
A current detection method that uses a shunt resistor and an operational amplifier is called a “current sense amplifier.” By the way, the shunt of the shunt resistor means “Shunt: avoid / drive away.” Originally, it meant the resistor was inserted in parallel to expand the measurement range of the analog ammeter.
What kind of resistor is used for current sensing?
The most commonly used and cost-effective solutions for current sensing is the shunt current sensor method. The shunt current sensor, also known as sense resistor is similar to a basic resistor but with very low resistance value.
How does a current sense resistor circuit work?
The above current sense resistor circuit shows how a shunt resistor is placed in a current carrying path and how the voltage drop across the resistor can be calculated by using a Current Sense Amplifier. You can know more about how current sense amplifiers work for following the linked article.
What does PCR stand for in shunt resistors?
However, Shunt resistor power dissipation can also be identified using the PCR value of a resistor. PCR stands for Power Coefficient of Resistance (ppm per Watt) and characterizes the different values of power dissipation of different value resistors. Since nothing is ideal in electronics, shunt resistors are not an exception.
What are the different types of current sensors?
Depending on the type of application, there are many types of current sensors with different current sensing techniques that are used to measure or detect current flow. The most commonly used and cost-effective solutions for current sensing is the shunt current sensor method.