Automotive-Compliant, Hall Effect ICs from Diodes Incorporated Offer Wide Choice of Switching Sensitivities for Optimal Proximity Detection

Diodes Incorporated (Diodes) (Nasdaq: DIOD) announces the addition of two enhanced high-voltage, Hall effect switch IC families to its automotive-compliant* product portfolio. The AH332xQ (unipolar) and AH352xQ (omnipolar) offer a wide range of operating sensitivity options in SIP-3, SOT23 (Type S), and SC59 packages. The devices can be used in a broad range of contactless position and proximity detection applications, including seatbelt fastening, door and trunk latching, windshield wipers, and steering-wheel locks.

The unipolar AH332xQ is activated when the magnetic flux density of correct polarity exceeds the defined operating threshold (BOP), and switches off when the flux density falls below the release threshold (BRP). Ten sensitivity options are available, ranging from a highly sensitive 30G BOP to a low-sensitivity 275G BOP version, allowing for a wide range of magnet and distance choices for optimal sensing.

The omnipolar AH352xQ is activated when the magnetic flux density of either a magnetic south or north pole exceeds the BOP and turns off when the magnetic flux density falls below the BRP. Three high-sensitivity options are available, ranging from ±20G to ±40G BOP devices.

The BOP and BRP thresholds for both the AH332xQ and AH352xQ provide a tight operating window with sufficient hysteresis for reliable operation, while a low-temperature coefficient ensures the stability of the switching points.

The AH332xQ and AH352xQ Hall effect devices have an open-drain output and operate over a wide 3.0V to 28V supply voltage range and -40°C to +150°C temperature range, providing product design flexibility to meet the requirements of the harsh automotive environment. Even when physical stress is applied to the package, the devices maintain very accurate sensitivity levels. For enhanced robustness and reliability, the devices have reverse blocking diodes with Zener clamps on their supply pins, as well as overcurrent limits and Zener clamps on their open-drain output. ESD protection exceeds 8kV HBM and 1kV CDM, and the devices have a 40V load-dump capability.

The AH332xQ and AH352xQ are available at $0.30 in 3,000-piece quantities.

About Diodes Incorporated

Diodes Incorporated (Nasdaq: DIOD), a Standard and Poor’s SmallCap 600 and Russell 3000 Index company, delivers high-quality semiconductor products to the world’s leading companies in the automotive, industrial, computing, consumer electronics, and communications markets. We leverage our expanded product portfolio of analog and discrete power solutions combined with leading-edge packaging technology to meet customers’ needs. Our broad range of application-specific products and solutions-focused sales, coupled with global operations including engineering, testing, manufacturing, and customer service, enable us to be a premier provider for high-volume, high-growth markets. For more information, visit www.diodes.com.

Description

The AH332XQ is an AECQ100 qualified high-voltage Hall-effect unipolar switch IC designed for position and proximity sensing in automotive applications such as in seat and seatbelt buckle, steering lock/immobilization, gear stick, transmission actuator and gear position, HVAC compression, wiper, door/trunk closure, etc. To support a wide range of the demanding applications, the design has been optimized to operate over the supply range of 3.0V to 28V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for internal circuits, the AH332XQ provides a reliable solution over the whole operating range. For robustness and protection, the device has a reverse blocking diode with a Zener clamp on the supply. The output has an overcurrent limit and a Zener clamp.

The single open-drain output can be switched on with South pole of sufficient strength. When the magnetic flux density (B) perpendicular to the package is larger than the operate point (BOP) the output is switched on (pulled low) and is held on until the magnetic flux density B is lower than the release point (BRP).

The magnetic operating and release polarity is opposite for SOT23 (Type S) and SC59 packages. The SOT23 (Type S), SIP-3 (Ammo Pack), and SIP-3 (Bulk Pack) packages require south pole to the part marking side to operate while SC59 requires south pole to the non-part marking side.

Feature(s)

Unipolar Operation

High Sensitivity: BOP and BRP of 30G to 275G and 20G to 250G Typical

Single Open-Drain Output with Overcurrent Limit

0V to 28V Operating Voltage Range

40V Load Dump Protection

Resistant to Physical Stress

Chopper Stabilized Design Provides

Superior Temperature Stability

Minimal Switch Point Drift

Enhanced Immunity to Stress

Good RF Noise Immunity

Reverse Blocking Diode

Zener Clamp on Supply and Output Pins

-40°C to +150°C Operating Temperature

High ESD HBM: 8kV, CDM: 1kV

AEC-Q100 Grade 0 Qualified

Industry Standard SC59, SOT23 (Type S), SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack) Packages

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

The AH332XQ is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Application(s)

Position and proximity sensing in automotive applications

Seat positions

Seatbelt buckles

Steering locks/immobilization

Gear sticks

HVAC compression

Transmission actuators

Transmission gear positions

Wipers

Sunroofs and windows

Door/trunk closures

Door locks

Contactless switches