Diodes Introduces High-Voltage, Automotive-Spec Hall-Effect Latch

Diodes Corporation (Diodes) (Nasdaq: DIOD) has added the AH371xQ series of high-voltage Hall-effect latches to its product portfolio. These automotive-specification devices feature a proprietary Hall board design for improved performance. The devices can be used in brushless DC (BLDC) motor control, valve operation, linear and incremental rotary encoders, and position sensing functions. As a result, the AH371xQ family can support a wide range of in-vehicle comfort and engine management product applications, including power window up/down and sunroof movement, tailgate open/close mechanisms, seat adjustment motors, cooling fans, water/oil pumps, and speed measurement.

These Hall-effect latches operate over a voltage range of 3V to 27V and include 40V load-surge protection. As a result, these latches can be integrated into a variety of automotive systems. The devices feature a Chopper-Stabilised design, which reduces the effects of thermal variations and provides better immunity to stray field interference. Device start-up time is typically 13 microseconds.

The devices are available in six sensitivities ranging from 25 gauss to 140 gauss, with tight operating windows and low switching point temperature coefficients. The different sensitivities provide engineers with different magnetic operating point (BOP) and magnetic release point (BRP) ranges. Therefore, the engineer can make the best choice based on the sensing distance and the magnet used. The Open-Drain output provides greater external pull-up flexibility when the voltage is above or below the supply voltage.

The latches in the AH371xQ family have an 8kV Human Body Model (HBM) Electrostatic Discharge (ESD) rating. Protection features integrated into these devices include reverse blocking diodes, overcurrent protection, and overvoltage clamp.

Diodes' new automotive-compliant Hall-effect latches meet AEC-Q100 Grade 0 specifications, are manufactured in IATF 16949-accredited facilities, and support PPAP documentation. The AH371xQ series is available in SOT23 (S-type), SC59, and SIP-3 (bulk) packages, with the AH3712Q also available in a U DFN2020-6 (SWP) package. These models and the complete Hall Effect Sensor portfolio are available on the Hall Effect Sensor Device Selection Tool page.