0 to 50 A Current Sensor ICs with Integrated Conductor
Our family of fully integrated, high-isolation current sensor solutions provides accurate measurement with very low resistance—all without the need for external isolation components.
Our proprietary packaging uses flip-chip technology which generates excellent magnetic coupling in a coreless package design. Our solutions also provide up to 4800 VRMS galvanic isolation.
Partners In Innovations
“Our technologies are featured in some of the most sophisticated vehicles, premium appliances and controls-driven products. Choosing Allegro MicroSystems as a partner allows us to do more.”
Our proprietary packaging uses flip-chip technology which generates excellent magnetic coupling in a coreless package design. Our solutions also provide up to 4800 VRMS galvanic isolation. These low-profile, small form factor packages are ideal for reducing PCB area over sense resistor op-amp or bulky current transformer configurations.
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Current Sensor IC 0 to 50 A Selection Guide
Documentation & Resources
Technical Article
Solar Energy Systems – New Market Trends in Current Sensing
P0103 - As solar installations grow larger and more ambitious by the day, new trends in current sensing are emerging for this expanding energy market.
Technical Article
New 400 kHz Current Sensors Enable More Sustainable Designs in Switch-Mode Power Designs
Really Cool. Really Efficient. New 400 kHz current sensors enable more sustainable designs in switch-mode power designs.
Application Note
An Effective Method for Characterizing System Bandwidth in Complex Current Sensor Applications
This application note describes multiple methods for measuring
and characterizing system bandwidth, with a focus on
the impulse response method. Allegro’s ACS720 is the perfect device to validate the test methods outlined here.
FAQ
Current Sensors FAQ
Have questions about our industry-leading current sensor ICs? Check out our most frequently asked questions and answers.
Application Note
Achieving Closed-Loop Accuracy in Open-Loop Current Sensors
Closed-loop current sensing technology is employed in many industrial and automotive applications for accurate current sensing. Allegro MicroSystems has developed magnetic-based current sensor IC solutions that achieve near closed-loop accuracy using an open-loop topology.
Technical Article
Magnetic Current Sensing Drives Vehicle Electrification
Modern cars have become increasingly power hungry. Even the “least electrified” vehicles include advanced electronics for infotainment, safety, and engine control. Fully electric vehicles further add high-voltage power domains to charge and drive. Each of these systems shares the need for power monitoring and control, and this is where current sensors are used.
Application Note
New Approaches to High-Efficiency Current Sensing: Integrated Hall Sensor ICs Save Power and Space
AN296100: Allegro current sensor ICs allow design engineers to use Hall-effect based current sensor ICs in new applications where increased energy efficiency or new operating features are required. Wherever current sensing is needed, an integrated Hall-effect IC can provide a solution.
Brochure
Brochure: Integrated Power Monitoring with the ACS37800
Allegro’s ACS37800 offers its customers the capability to easily monitor and optimize the energy efficiency of power supplies, lighting, and motor control sub-systems in connected building automation solutions while simplifying the system design.
Brochure
Brochure: Innovative Current Sensor ICs
Allegro MicroSystems has been driving innovation in the current sensor industry for more than 17 years, with a history of first-to-market products that give our customers a competitive edge. Our advanced ICs help you achieve higher efficiency and power density in your designs.
Application Note
I2C Addressing and Fault Monitoring Using The ACS71020 or ACS37800 Power Monitoring IC Digital Input Output Pins
AN296172 - This application note describes methods of setting the I2C slave address of the ACS71020/ACS37800 and the added functionality of the digital input-output (DIO) pins when operating in I2C mode.
Brochure
Brochure: Current Sensing for Vehicle Electrification
Charge into the future of vehicle electrification with the world's #1 supplier of current sensor ICs for leading EV applications.
Brochure
Brochure: Solar Energy Harvesting
Allegro’s current sensor ICs are ideal for use with solar applications, which include electronic subsystems like solar combiner boxes, DC/DC converters for maximum power point tracking (MPPT), and DC-AC inverters.
Application Note
Convenient and Isolated Power Measurements via SPI or I2C using ACS71020 or ACS37800 Power Monitoring ICs
AN296180 - This application note describes the I2C and SPI interfaces on the ACS71020/ACS37800 Power Monitoring ICs from Allegro MicroSystems.
Application Note
Managing External Magnetic Field Interference When Using ACS71x Current Sensor ICs
AN26030 - In applications where large magnetic fields may be present, care must be taken in the alignment and spacing of the Hall element relative to those fields.
Application Note
DC and Transient Current Capability/Fuse Characteristics of Surface Mount Current Sensor ICs
AN269122 - Allegro Microsystems offers a broad product family of current sensor IC solutions with integrated conductors. For applications with normal operating currents up to 50 A, Allegro offers current sensor ICs in a number of standard surface-mount packages, such as SOIC-8, SOICW-16, QSOP-24, and QFN1.