Magnetic Sensors: TDK releases new ASIL C ready stray-field robust 3D HAL® sensors for Automotive and Industrial applications

• HAL 3930-4100 (single die) and HAR 3930-4100 (dual die) are precise Hall-effect position sensors with robust stray-field compensation capabilities with PWM or SENT output interfaces
• The single die sensor is defined as ASIL C- ready and can be integrated in automotive safety-related systems up to ASIL D
• Target automotive applications include steering-angle position detection, transmission position detection, shifter position detection, chassis position detection, accelerator and brake-pedal position detection**

November 28, 2023

TDK Corporation (TSE:6762) further extends its Micronas 3D HAL^® position sensor family with new HAL 3930- 4100 and HAR 3930-4100 for automotive and industrial applications. Both sensors empower precise position detection with robust stray-field compensation capabilities, offering flexible digital output interfaces in the form of PWM or SENT. The single die devices are defined as SEooC (Safety Element out of Context) ASIL C ready according to ISO 26262 and can be integrated in automotive safety-related systems up to ASIL D. The sensors are suitable for applications such as steering angle position detection, transmission position detection, shifter position detection, accelerator and brake pedal position detection.** . The start of production is planned for January 2024; samples are now available on request.

Both sensors offer user-configurable PWM or SENT output interfaces, which enhances adaptability. Additionally, the sensors introduce a switch output with versatile high-/low-side switch configurations. The switch signal originates from calculated position data or other sources along the device's signal path, such as temperature or magnetic-field amplitude. As ASIL C ready devices, HAL 3930-4100 and HAR 3930-4100 both conduct self-tests when starting up and during regular operation to enhance its reliability. These tests are designed to either prevent the sensor from giving incorrect readings or to report errors either via the SENT interface according to the SENT standard or via the PWM interface.

HAR 3930-4100 is the dual-die version of the HAL 3930-4100, providing full redundancy. It is equipped with two independent dies stacked on top of each other, separated both mechanically and electrically. These two dies, while measuring nearly identical magnetic fields, ensure synchronized output signals. This redundancy design, housed within a single package, accomplishes the dual feat of reducing system costs and elevating overall reliability. Smaller PCBs and fewer solder joints further bolster system dependability. The HAR 3930-4100 is conveniently available in a compact SSOP16 package, while the single-die variant is housed in a SOIC8 package.

HAL 3930-4100 and HAR 3930-4100 offer an extensive range of measurement capabilities, encompassing 360° angular measurements, linear movement tracking, and the provision of 3D position data for magnets. This 3D position information can be transmitted through SENT or two PWM outputs. Moreover, the sensors feature a modulo function, primarily tailored for chassis position sensor applications. This function facilitates the partitioning of the 360° measurement range into smaller, more precise segments like 90°, 120°, and 180°.

Furthermore, the on-chip signal processing functionality computes up to two angles from magnetic-field components, converting them into a digital output signal. This flexible feature empowers customers to fine-tune essential parameters such as gain, offset, reference position, and more through non-volatile memory programming, ensuring seamless alignment with their specific magnetic circuitry requirements.

Glossary

• Stray-field compensation: Modern Hall-effect sensors must be insensitive against disturbing fields generated by e-motors or power lines in hybrid or electric vehicles (xHEV)

Main applications**

• Steering angle position detection
• Gear shifters
• Brake stroke position sensors
• Position detection in transmission systems
• Park lock actuators

Main features and benefits

• Stray-field robust 360°C rotary and linear position detection up to 35 mm
• High robustness against mechanical misalignment between sensor and magnet in rotary setups
• Optimized design supporting rotary setups together with ferrite magnets
• ASIL C ready 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	HAL 3930-4100	HAR 3930-4100
Packages	SOIC8	SSOP16
Output formats	PWM, SENT SAE J2716 rev. 4, Switch
Angular error	±0.6° @ 10 mT
Magnetic-field amplitude range	From 10 mT up to max. 200 mT (depending on measurement mode)
Safety	ASIL C ready, developed according to ISO 26262

* HAL/HAR 39xy uses licenses of Fraunhofer Institute for Integrated Circuits (IlS).
** 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.
*** 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 2023, TDK posted total sales of USD 16.1 billion and employed about 103,000 people worldwide.

Further information on the products can be found https://www.micronas.tdk.com/en/products/direct-angle-sensors/hal-39xy.