CurrentIt is one of the important means to evaluate, diagnose and control the effectiveness of electronic systems.
According to Ohm's law i=u r, when the measured current flows through the resistor, the voltage generated across the resistor is proportional to the current flowing through the resistor, so the current value flowing through the resistor can be obtained by detecting the voltage value generated at both ends of the resistor.
The resistor used to sense the current is also calledCurrent Sensing Resistors (CSR).。Considering that it does not increase power loss and does not affect the magnitude of the current in the circuit, the resistance of the current sense resistor is very small, usually in the milliohm range. As a high-precision current sensor, the accuracy of the current detection resistance represents the accuracy of the resistance value, which is affected by many factors, such as power, temperature coefficient, thermoelectric potential, inductive reactance, etc., which will affect the accuracy of current measurement, so chooseA current sense resistor with both stability and accuracyCrucial.
In the process of continuous upgrading of electronic equipment, due to higher requirements for circuit control and protection, the application range of current sense resistors is becoming more and more extensive, and the technical and precision requirements are also getting higher and higher.
VianAs a comprehensive solution provider focusing on circuit protection and power control, we have a deeper understanding of the requirements of circuit sensing from the perspective of circuit control and protection. Many years ago, Vian has developed and mass-produced a full range of current sense resistors and modulesDetermined to create the most complete and most advanced product series in ChinaTogether with the company's other advantageous product lines of circuit protection and control, we provide customers with comprehensive solutions.
Vian currently has 5 major CSR product lines:MLR series for alloy foil process, MAR series for pure alloy process, MPR and MSR series for hunt process, andCurrent sensor module。The products are widely used in consumer electronics, network communications, industrial and Internet of Things, automobiles, new energy and other major markets, based on technological innovation, and constantly improve the layout of advanced technology and overall products.
Figure 1 Types of CSR products
Vian CSR products, the use of independent research and development of automated advanced process, to achieve the upgrading and optimization of raw materials, special equipment, withHigh power, high precision, low temperature coefficient, high reliabilityand other advantages, the product performance is comparable to the international advanced level, and all product series are availableMeets the International Association of Automotive Electronics Association AECQ-200 (Passive Components) test standard。Thanks to advanced technology and strict production standards, the current Wei'an CSR has received support from many brand customers and has generated substantial cooperation.
Current sensorsis an automotive-grade current sensing module that can be used to measure bidirectional DC currents and features:High accuracy, low power consumption, wide operating temperature rangeandExcellentResponsiveness, temperature stability, and immunity to interference。The Weian current sensor is designed based on a cryogenic drift shunt, using a 24-bit automotive ADC, M0 architecture MCU, and CAN20 A B protocol for communication, meet the operating temperature range of -40 105, support -600A 600A continuous working current and -50 150 temperature measurement, high-precision algorithm, according to the real-time detection of shunt temperature, temperature compensation for the collected data, more accurate sampling.
The current measurement accuracy in the range of 50A, 600A, or -600A -50A is 01% with a maximum temperature measurement error of 3 over the full temperature operating range. At the same time, the Vian current sensor operates from a single 6V to 18V power supply, consumes less than 400mW (12VDC), and achieves complete high- and low-voltage isolation, which can be used on either the positive or negative end of the battery system.
Product Features & Benefits:
Vian CSR series.
Fig. 2 Vian MLR series.
Fig. 3 Vian MAR series.
Figure 4 Vian MPR series.
Fig. 5 Vian MSR series.
Typical application cases
Industrial Power Supplies (AC-DC).
PN: MPR series
Multi-cell lithium battery BMS
(Power tools, two-wheelers, energy storage.)
PN: Mar series
Product Information
In a homogeneous market environment, the more seemingly "simple" a product is, the more distinctive it needs to stand out. With a focus on basic research and innovative processes, Vian provides cost-effective products for high-growth strategic markets, maintains sensitivity to the ever-changing market, and continues to invest in product and technology development for related applications to provide customers with competitive products and excellent quality assurance.
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