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    6762   JP3538800008

TDK CORPORATION

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Magnetic Sensors: TDK announces 3D HAL« technology-based position sensor with redundancy for safety-critical applications

11/18/2021 | 04:22am EST
  • New dual-die Hall-effect sensor HAR 3927** offers ratiometric analog output and digital SENT protocol according to SAE J2716 rev. 4
  • Superior angular measurement and redundancy functions for safety-critical automotive and industrial applications* in a small SOIC8 SMD package

November 18, 2021

TDK Corporation (TSE:6762) announces the portfolio expansion of its Micronas direct-angle Hall-effect sensor family with the HAR 3927**. This product uses proprietary 3D HAL® pixel-cell technology and addresses the need for ISO 26262-compliant development. The new sensor comes with both a ratiometric analog output as well as a digital SENT interface according to SAE J2716 rev. 4.

Samples are already available. The start of production is planned for the first quarter of 2022.

The HAR 3927 offers a fully redundant sensor solution for safety-critical automotive applications, such as linear-movement measurements in dual-clutch transmissions, engine stroke sensors, rotary position measurements in gear selectors and accelerator pedals, and electronic throttle control*.

Each HAR 3927 sensor contains two stacked dies that operate independently. The dies have minimal displacement and are penetrated by the same field lines. The HAR 3927, compared to other solutions with two dies side by side, operates with significantly smaller magnets. Its magnetic field amplitude range is 20 mT to 130 mT, and down to 5 mT with reduced accuracy.

The HAR 3927 is available in a miniature eight-pin SOIC8 package. The redundant single-package solution reduces system costs while increasing the reliability of the system due to smaller PCBs and less solder joints.

The sensor offers two different output formats and a linearization block for an output signal of up to 33 setpoints (17 variable or 33 fixed setpoints). Due to the proprietary 3D HAL pixel-cell technology, customers can measure magnetic-field components, enabling linear and rotary position measurements up to 360°, as well as on-and-off-axis measurements. Primary characteristics like gain and offset, reference position, etc. can be adjusted to the magnetic circuitry by programming the non-volatile memory.

Various configuration options of HAR 3927 increase customers' flexibility during development and enable one sensor to be used in multiple applications, which reduces costs and effort for re-qualification.

Glossary

  • 3D HAL® pixel cell: Enables the direct measurement of magnetic fields in three directions X, Y, Z.

Main applications*

  • Detection of angle of rotation in automotive applications, such as accelerator pedal, electronic throttle control, rotary shifters (with push-function), as well as rear-axis steering systems
  • Detection of linear position in applications like clutch or brake pedal, transmission system, cylinder and valve position sensing

Main features and benefits***

  • Very low angular error of ±1.0° @ 30 mT amplitude
  • End-of-shaft and off-axis 360° angular measurement
  • Direct measurement of magnetic-field amplitude (BX, BY, BZ)
  • Customer-selectable analog or SENT output
  • Full redundancy due to Dual-Die approach
  • SEooC according to ISO 26262 to support functional-safety applications
  • Suitable for automotive applications, due to a wide ambient temperature range from -40 °C to 160 °C

Key data

Type HAR 3927
Package SOIC8
Output formats Analog, SENT SAE J2716 rev. 4
Angular error ±1.0° @ 30 mT
Magnetic-field amplitude range 20 mT -130 mT. Down to 5 mT with reduced accuracy
Safety ASIL-B ready development according to ISO 26262

* Any mention of target applications for our products are made without a claim for fit for purpose, as this has to be checked at system level.
** HAL/HAR 39xy uses licenses of Fraunhofer Institute for Integrated Circuits (IlS)
*** All operating parameters must be validated for each customer application by customers' technical experts.

About TDK Corporation
TDK Corporation is a world leader in electronic solutions for the smart society based in Tokyo, Japan. Built on a foundation of material sciences mastery, TDK welcomes societal transformation by resolutely remaining at the forefront of technological evolution and deliberately "Attracting Tomorrow." It was established in 1935 to commercialize ferrite, a key material in electronic and magnetic products. TDK's comprehensive, innovation-driven portfolio features passive components such as ceramic, aluminum electrolytic and film capacitors, as well as magnetics, high-frequency, and piezo and protection devices. The product spectrum also includes sensors and sensor systems such as temperature and pressure, magnetic, and MEMS sensors. In addition, TDK provides power supplies and energy devices, magnetic heads and more. These products are marketed under the product brands TDK, EPCOS, InvenSense, Micronas, Tronics and TDK-Lambda. TDK focuses on demanding markets in automotive, industrial and consumer electronics, and information and communication technology. The company has a network of design and manufacturing locations and sales offices in Asia, Europe, and in North and South America. In fiscal 2021, TDK posted total sales of USD 13.3 billion and employed about 129,000 people worldwide.

About TDK-Micronas
TDK-Micronas is the center of competence for magnetic-field sensors and CMOS integration within the TDK group. TDK-Micronas has gained operational excellence for sensors and actuators production in over 25 years of in-house manufacturing. It has been the first company to integrate a Hall-effect based sensor into CMOS technology in 1993. Since then, TDK-Micronas has shipped over five billion Hall sensors to the automotive and industrial market. The operational headquarters are located in Freiburg im Breisgau (Germany). Currently, TDK-Micronas employs around 1,000 people.

Disclaimer

TDK Corporation published this content on 18 November 2021 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 18 November 2021 09:21:01 UTC.


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Sales 2022 1 786 B 15 629 M 15 629 M
Net income 2022 113 B 988 M 988 M
Net Debt 2022 215 B 1 879 M 1 879 M
P/E ratio 2022 14,1x
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Number of Analysts 19
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Shigenao Ishiguro Manager-Business Planning
Tetsuji Yamanishi Manager-Managerial Accounting
Makoto Sumita Chairman
Dai Matsuoka Executive Officer & General Manager-Technology
Kazuhiko Ishimura Independent Outside Director
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