Monday, December 5, 2022

Magnetic Angle Sensor For Power Steering Application

By Sharad Bhowmick

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The Alps Alpine sensors are designed for enhancing the safety of vehicles and can be used in vehicle power steering.

To boost the adoption of electric vehicles and support the ongoing electrification of vehicles, Alps Alpine has released two new products to its magnetic sensor line-up. A single die and a dual-die1 model. Both models are angle sensors that achieve redundancy by providing two output signals from a single product. These sensors provide resistance to outside magnetic disturbance making the sensing more accurate. These sensors are applicable for “non-contact” switch, linear position/angle, and rotation speed/direction detection.

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“Redundancy design is increasingly a requirement for automobile driving systems,” according to the company. “The use of multiple sensors was once the typical way of realising redundancy, to ensure that systems function safely even when a fault occurs. In recent years, however, smaller systems mean greater demand for angle sensors that achieve redundancy by providing two output signals from a single product.”

The magnetic sensors feature a built-in amp to support size reductions and fulfil redundancy design needs with a single-ended high output of 3Vpp. The sensors come in a small package, measuring just 5 x 6.4 x 1.1mm TSSOP16.

According to the company, the sensors are capable of operating at high-temperature of up to 150°C, moreover, these sensors have a strong magnetic field resistance of 120mT through the application of original thin-film technology. The sensor has a low power consumption of 10mA and meets the AEC-Q100 automotive for reliability.
“They perform well in environments up to 150°C, while also achieving magnetic field resistance of 120mT through the application of original thin-film technology,” it said.

Specification 

  • Package specifications: TSSOP16 type
  • Type: Angle (Sin/Cos, Surface mount)
  • Size: 5.0×6.4×1.1mm
  • Operating magnetic field: 10 to 120mT
  • Drive voltage: 5.5V max.
  • Bridge resistance: 3.5kΩ
  • Operating temperature range: -40℃ to +150℃
  • Supply voltage (VDD): max.=5.5V
  • Operating temperature range :-40℃ to +150℃
  • Magnetic field strength (Hext): 200mT (160kA/m)
  • Meets AEC-Q100 automotive reliability standard

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