Diodes introduces high voltage, automotive specification Hall-effect latches

     Diodes adds the AH371xQ series of high voltage Hall effect latches to its portfolio. These automotive specification-compliant devices feature a proprietary Hall plate design for improved performance. These devices can be used for brushless direct current (BLDC) motor control, valve operation, linear and incremental rotary encoders, and position sensing functions. As a result, the AH371xQ series supports a wide range of in-car comfort and engine management product applications, including electric window lift and sunroof movement, tailgate opening/closing mechanisms, seat adjustment motors, cooling fans, water/oil pumps and speed measurement.

     These Hall-effect latches operate from 3V to 27V with 40V load drop protection. As a result, these latches can be integrated into various automotive systems. This family of devices uses a Chopper Stabilized design to reduce the effects of thermal changes and provide better resistance to stray field interference. Device startup time is usually 13 microseconds.

     These devices are available in six sensitivities, ranging from 25 gauss to 140 Gauss, with tight operating Windows and low switching point temperature coefficients. Different sensitivities provide engineers with different ranges of magnetic operating point (BOP) and magnetic release point (BRP). Therefore, engineers can make the best choice based on the sensing distance and the magnets used. Open-Drain outputs provide greater external pull-up flexibility when the voltage is higher or lower than the supply voltage.

     The latch in the AH371xQ series has an 8kV mannequin (HBM) electrostatic discharge (ESD) rating. The integrated protection features of these devices include reverse blocking diodes, overcurrent protection, and overvoltage clamping.

     Diodes' new automotive compliant Hall Effect latch is AEC-Q100 Grade 0 compliant, manufactured in IATF 16949 certified facilities and supports PPAP documentation. The AH371xQ series is available in SOT23 (Type S), SC59 and SIP-3 (bulk) packages, of which the AH3712Q is also available in U-DFN2020-6 (SWP) packages.