What Are Current Sense Resistors?

The sampling resistor is also called a current detection resistor, a current sensing resistor, a sampling resistor, and a current sensing resistor.

In simple words description is a patch

In order to operate safely or control current, electronic products are increasingly using various current sensing devices. Current sensing is commonly used in the following two aspects: 1) overcurrent protection, which monitors the current flowing through the engine or power output line, and reduces the voltage if the load is too large; 2) multiphase load balancing, which monitors Ampere values and have an impact on real-time response. Using a current-sensing resistor can provide a simple current-sensing signal and make a linear response to current changes, thereby ensuring that the circuit operates reliably over a wide temperature range. ^[1]

PT series current sensing resistors have accurate temperature coefficient characteristics and strengthen the stability of the product to current sensing. They are especially suitable for high-end portable applications such as smart phones, small notebooks and various portable storage products. The current sensing resistor has been certified, and the launch of the PT series shows the ability to develop customized products. ^[2]

PT Characteristics of current sense resistor PT

The size range of PT series current sensing resistors covers 0402/0603/0805/1206/2010/2512. Compared with the existing RL series, the temperature coefficient of resistance (TCR) performance is greatly improved, the lowest can reach 75 _ppm / . In addition, the PT series also features low resistance, down to 100m. The above characteristics give the product outstanding performance and reliability, and provide portable products with tight design space and high function convergence, such as smart phones and small laptops, with more accurate current sensing functions. ^[2]

PT Application of current sense resistor PT

RL series current sensing resistor products have been widely used in notebook computers, power supplies and mobile phones. Combining R & D, production technology and manufacturing process, the PT series is introduced with temperature coefficient characteristics to minimize resistance drift. The future trend of current sensing resistors will be toward smaller size, higher power and smaller temperature coefficient of resistance. It is planned that after the PT series, a version with the same size and resistance value but twice the power will be introduced, providing a complete selection of sizes and power. ^[2]