Giant magnetoresistance sensors are strong candidates for the high-accuracy wheel-speed sensing necessary in autonomous vehicle systems. Christine Graham | Allegro MicroSystems The purpose of a braking system has evolved from simplistic stopping to critical functions in vehicle safety through highly accurate feedback to traction control (TCS) and advanced driver assistance systems (ADAS). These advances have […]
Code-free FOC BLDC motor drivers target fan, cooling apps
Allegro MicroSystems announced the launch of the company’s QuietMotion family. This family consists of the first-to-market Field Oriented Control (FOC) brushless DC (BLDC) electric motor controllers that are customer code-free. The devices are designed to provide reliable and efficient low audible noise performance while reducing design cycle time. Whereas most FOC BLDC drivers require software developers to […]
Advanced transmission speed sensor ICs designed to certified ISO 26262
Allegro MicroSystems has announced the release of its most advanced transmission speed sensor family members, complete with ASIL B certification. The A19520, A19530, and A19570 magnetic sensor ICs are the product of nearly 20 years of application-specific experience and technological advancement—including GMR and Hall effect technology—making them ideal for meeting the demanding requirements of today’s transmission applications. The A19520, […]
Hall effect IC obtains speed and duty cycle information in position and timing apps
Allegro MicroSystems announced the A17301, a new Hall effect sensor IC ideal for two-wheeled vehicles, particularly in position and timing applications like speedometers and tachometers for engine control. Integrating electromagnetic capability (EMC) components into a small SIP package, the A17301 is a robust solution for digital ring-magnet sensing or ferromagnetic target sensing when coupled with a […]
Top power electronics stories of 2017
Here are the power electronics features that got the most interest from readers in 2017. Teardown: Inside Ikea’s smart LED bulb As smart LED bulbs go, this one is pretty simple. It doesn’t incorporate any sort of smartphone app and can’t be controlled over the Internet, like some other smart bulbs […]
Secrets of measuring currents above 50 amps
There is an art to getting accurate readings of high current values. It pays to know a few of the tricks. GEORGES EL BACHA, EVAN SHORMAN, HARRY CHANDRA | ALLEGRO MICROSYSTEMS LLC IT CAN BE CHALLENGING to sense currents exceeding 50 A because the task often involves thermal management, must take place in a limited […]
What are Hall effect sensors?
Magnetic sensors are typically Hall effect sensors (named after Edwin Hall who discovered the effect in 1879), whereby a small voltage difference can be measured across a conductor with current flowing through it when a perpendicular magnetic field is applied. They are available as small, integrated solutions with signal or multiple outputs, and analog or […]
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