Thursday, July 18, 2024

Advanced Automotive Hall-Effect Latch Series

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The series is a new Hall-effect latch, suitable for engine management and vehicle comfort, featuring design advancements and protection.


Diodes Incorporated expands its product line with the AH371xQ series. These Hall-effect latches are for automotive use and feature a Hall plate design that improves performance. The series is helpful in various applications, including the control of brushless DC motors, the operation of valves, and both linear and incremental rotary encoders for position-sensing tasks.

The series operates within a 3V to 27V range, including 40V load dump protection, making it suitable for various automotive systems. It benefits vehicle comfort and engine management tasks such as window lifting, sunroof movement, tailgate mechanisms, seat motors, cooling fans, water/oil pumps, and speed measurement.

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These devices utilize a chopper-stabilized design to reduce thermal variation effects and enhance stray field immunity. With a typical power-on time of 13µs, the series offers prompt, reliable operation. Engineers can select from six sensitivity ranges between 25 and 140 gauss, allowing for flexibility in sensing distances and magnet types.

The open-drain outputs of these latches allow for varied external pull-up voltages. The series includes an 8kV human body model ESD rating for robust protection and a reverse blocking diode, overcurrent protection, and overvoltage clamp.

The series meets high automotive standards, being AEC-Q100 Grade 0 qualified and produced in IATF 16949 certified facilities. It supports PPAP documentation and comes in various packages, including SOT23, SC59, and SIP-3, with the AH3712Q also available in U-DFN2020-6.

Some of the key features involve:

  • Compliance(Only Automotive supports PPAP): Automotive
  • AEC Qualified: Yes
  • Type: Latch
  • Outputs: Single
  • Output Type: Open Drain
  • Active Output State (B > Bop): Low
  • Inactive Output State (B < Brp): High-Z
  • Operating Voltage (V): 3 to 27
  • Average Supply Current (mA): 208

Engineers can explore the series and other Hall-effect sensors using the part selector tool. Diodes Incorporated demonstrates its commitment to innovation and reliability with these new additions to its automotive electronics range.

For more information, click here.

Nidhi Agarwal
Nidhi Agarwal
Nidhi Agarwal is a journalist at EFY. She is an Electronics and Communication Engineer with over five years of academic experience. Her expertise lies in working with development boards and IoT cloud. She enjoys writing as it enables her to share her knowledge and insights related to electronics, with like-minded techies.


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