Diodes Incorporated has broadened its range of automotive-compliant products with the release of two new series of high-voltage Hall effect switch ICs: the unipolar AH332xQ and the omnipolar AH352xQ. These switches are designed for contactless position and proximity sensing, making them ideal for automotive applications such as detecting seat belt fastening, monitoring door and trunk latches, controlling windshield wipers, and securing steering-wheel locks. Both IC families are available in SIP-3, SOT23 (Type S), and SC59 packages, providing versatile design options.
The AH332xQ unipolar switch activates when the magnetic flux density surpasses a set threshold (BOP) and deactivates when the flux drops below the release point (BRP). It offers ten sensitivity levels, ranging from a highly sensitive 30G BOP to a less sensitive 275G BOP, giving designers flexibility in choosing the best magnet and distance for their specific sensing needs.
The AH352xQ omnipolar switch detects magnetic flux from either the north or south pole, with activation and deactivation thresholds also defined by BOP and BRP. It offers three high-sensitivity options, ranging from ±20G to ±40G, ensuring accurate detection from both magnetic poles.
Both series feature an open-drain output, a wide operating voltage range from 3.0V to 28V, and can withstand temperatures from -40°C to +150°C. Built for the demanding conditions of automotive environments, the devices include reverse blocking diodes, Zener clamps on supply pins, overcurrent protection, and strong ESD resilience (8kV HBM and 1kV CDM). Additionally, they can endure a 40V load dump, enhancing their durability.
Offered in reels of 3,000 units, the AH332xQ and AH352xQ are priced at USD 0.30 per unit, making them a cost-effective choice for a wide range of automotive applications.