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Home > Products > Sensors, Transducers > Magnetic Sensors > Switches (Solid State)

Diodes Incorporated AH3762Q-P-B

Name: AH3762Q-P-B
Brand: Diodes Incorporated
SKU: AH3762Q-P-B
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: AH3762Q-P-B

Manufacturer:: Diodes Incorporated

Category:: Switches (Solid State)

Package:: 3-SIP Module

Datasheet:: AH3762Q-P-B.pdf

Description:: MAGNETIC SWITCH LATCH 3SIP

Quantity:: RFQ Add To RFQ list

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Inventory:4,062

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Product details

Overview

AH3762Q from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect bipolar latch IC designed for brushless DC motor commutation, RPM sensing, and angular/linear position detection. It operates from 3.0V to 28V, features ±25G typical operate/release points, chopper-stabilized architecture for thermal stability, and a single open-drain output with overcurrent limit and Zener clamping on VDD and OUTPUT pins.

For engineers reviewing the AH3762Q datasheet, AH3762Q pinout, AH3762Q application, or AH3762Q equivalent, key selection criteria include magnetic sensitivity (Bop/Brp), wide supply range compatibility, latch polarity behavior per package orientation, and automotive-grade robustness including reverse voltage protection, ESD >8kV HBM, and operation up to +150°C junction temperature.

Technical Context

The AH3762Q implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated biasing, enabling <±0.5G typical drift over –40°C to +150°C. Its bipolar latch function requires South pole activation and North pole deactivation, with polarity direction dependent on package type: SOT23/SIP-3 require South pole toward part marking side, while SC59 requires South pole toward non-marking side.

Functional block integration includes low-pass filtering, sample-and-hold amplification, and a power switch with current limiting (30–55mA). The device delivers 10µs typical power-on time, 3.75µs response delay, and supports external pull-up configurations via its open-drain output-enabling direct interface with 3.3V/5V/12V/24V logic systems without level-shifting.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	3.0V to 28V - Enables direct connection to automotive battery rails (12V/24V) and compatibility with start-stop and load-dump transients.
Operating Temperature	–40°C to +150°C - Qualified for under-hood and transmission-mounted applications per AEC-Q100 Grade 0.
Magnetic Sensitivity (Bop / Brp)	+25G / –25G typical - Provides reliable switching at low field strengths, supporting compact magnet designs in tight mechanical envelopes.
Output Type	Open-drain with 60mA continuous rating and 30–55mA current limit - Allows flexible pull-up selection and inherent short-circuit protection during fault conditions.
Hysteresis (BHY)	50G typical - Prevents chatter near threshold transitions, critical for stable RPM counting and position indexing in noisy environments.
ESD Robustness	HBM >8kV, CDM >2kV - Ensures handling survivability and system-level immunity in automated assembly and field service scenarios.
Power-On Time	10µs typical - Supports high-speed motor commutation timing (e.g., >100kHz electrical frequency) without startup latency penalties.

Pinout & Package

Available in SC59, SOT23, and SIP-3 (Ammo Pack/Bulk Pack) packages - all lead-free, RoHS- and "Green"-compliant. SIP-3 offers higher power dissipation (550mW at 25°C) versus SC59/SOT23 (230mW), enabling use in thermally constrained PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 - VDD	Positive supply input	Accepts 3.0–28V; includes reverse-blocking diode and Zener clamp (32V transient rating) for battery-reversal and load-dump protection.
2 - GND	Ground reference	Common return path for internal circuitry and output stage; must be low-impedance to maintain noise immunity and thermal stability.
3 - OUTPUT	Open-drain digital output	Sinks current when latched ON (V_ON ≤ 0.4V @ 20mA); requires external pull-up; features Zener clamp and overcurrent limit for fault resilience.

Key Features

Feature	Design Value
Bipolar latch operation	South pole activates, North pole releases - Enables absolute position detection without external logic or microcontroller polling.
Chopper stabilization	Reduces offset drift to <±0.5G over full temperature range - Eliminates need for calibration in production and ensures long-term accuracy in engine bay environments.
Integrated protection	Reverse-blocking diode + dual Zener clamps (VDD and OUTPUT) - Removes requirement for discrete TVS or series diodes in automotive power domains.
High-voltage tolerance	32V absolute max VDD (transient) - Withstands ISO 7637-2 Pulse 1/2a/5a events without external suppression components.
RF noise immunity	Validated against automotive EMC standards - Reduces susceptibility to ignition noise, alternator ripple, and infotainment RF emissions without added shielding.

Applications

BLDC Motor Commutation

RPM Measurement

Use Scenario: Detect rotor position in 3-phase brushless DC motors for electronic control units in electric power steering (EPS) and HVAC blowers.

IC Role / Device Role / Timing Role: Bipolar latch provides precise 60° electrical phase alignment signals to MCU for synchronous PWM gate driving.

Use Value: Enables sensor-based commutation with <1° angular error over lifetime, eliminating need for encoder feedback in cost-sensitive EPS modules.

Use Scenario: Count magnetic pulses from rotating gear teeth in transmission speed sensors or wheel speed ABS modules.

IC Role / Device Role / Timing Role: Latched output delivers clean, jitter-free pulse train directly to microcontroller timer capture inputs.

Use Value: Achieves accurate RPM resolution down to 1 rpm at 200 km/h vehicle speed using standard 48-tooth tone rings and low-cost ferrite magnets.

Angular Position Sensing

Linear Flow Meter Sensing

Use Scenario: Monitor throttle valve or camshaft angle in gasoline direct injection engines using rotary magnet targets.

IC Role / Device Role / Timing Role: Provides digital on/off state transitions synchronized to magnet pole transitions across 360° rotation.

Use Value: Delivers deterministic edge timing with <3.75µs response delay, supporting closed-loop air-fuel ratio control at engine speeds up to 8,000 RPM.

Use Scenario: Detect piston or vane movement in automotive fuel or coolant flow meters with embedded Hall sensing.

IC Role / Device Role / Timing Role: Converts linear displacement of ferrous target into periodic latch toggling for volumetric flow calculation.

Use Value: Maintains ±1% flow accuracy over –40°C to +125°C ambient with no recalibration, meeting OEM fuel economy validation requirements.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Hall-effect latch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
AH3722Q	Successor device with identical pinout, improved Bop/Brp tolerance (±20G min/max vs ±25G typ), lower IDD (2.5mA typ), and enhanced ESD (HBM >12kV).	Drop-in replacement for new designs; supports tighter magnetic gap tolerances and lower system power budgets.	Select AH3722Q for new automotive designs requiring extended lifecycle support and improved parametric consistency.
AL3762Q	Same die in alternate package (TO-92), higher PD (750mW), but slower response (td = 5µs) and no AEC-Q100 qualification.	Limited to non-safety-critical cabin or body electronics where temperature range and qualification are less stringent.	Use AL3762Q only in non-AEC applications where SIP-3 footprint is unavailable and thermal margin exceeds 100°C ambient.

Compared with AH3762Q, AH3722Q offers superior production consistency and longer manufacturer support, while AL3762Q trades automotive qualification for higher thermal headroom in non-automotive contexts-making AH3762Q optimal for legacy AEC-Q100-compliant systems where redesign is not feasible.

Availability

AH3762Q is available at Aetrix Electronics and suitable for brushless DC motor control, automotive RPM sensing, and angular position detection requiring stable component supply across extended temperature and voltage ranges.

Supply support for AH3762Q includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and consumer markets, with IATF 16949-certified manufacturing.

The AH3762Q belongs to Diodes' automotive-qualified Hall-effect sensor product line, engineered specifically for high-reliability position and speed sensing in harsh under-hood environments.

FAQ

What is the magnetic polarity requirement for AH3762Q activation?

The AH3762Q requires a South pole to activate (pull output low) and a North pole to release (release latch). However, polarity orientation depends on package: for SOT23 and SIP-3, South pole must face the part marking side; for SC59, South pole must face the non-marking side. This is due to die orientation differences across packages and is confirmed in the functional block diagram and pin view diagrams.

Can AH3762Q operate reliably at 28V continuously?

Yes - the AH3762Q is rated for continuous operation from 3.0V to 28V per Recommended Operating Conditions. Its internal bandgap regulator and chopper-stabilized architecture maintain stable switching thresholds across this full range. Absolute maximum VDD is 32V, but that rating applies only to transient stress events, not sustained operation.

Does AH3762Q require an external capacitor on VDD?

Yes - a 10nF to 100nF ceramic decoupling capacitor (CIN) is recommended between VDD and GND, placed as close as possible to the device pins. This stabilizes the internal supply rail, suppresses high-frequency noise, and strengthens immunity to conducted EMI from automotive power systems, as specified in the Typical Applications Circuit and Note 4.

Is AH3762Q still recommended for new designs?

No - Diodes Incorporated explicitly states "THE AH3762Q IS NOT RECOMMENDED FOR NEW DESIGNS. PLEASE USE THE AH3722Q." The AH3722Q is a direct functional and pin-compatible successor with tighter magnetic specifications, lower quiescent current, higher ESD rating, and ongoing production support. AH3762Q remains available for legacy design continuity and repair.

AH3762Q-P-B Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 3-SIP Module

Packaging:: Bulk

Product Status:: Obsolete

Function:: Latch

Technology:: Hall Effect

Polarization:: South Pole

Sensing Range:: 4mT Trip, -4mT Release

Test Condition:: -40°C ~ 150°C

Voltage - Supply:: 3V ~ 28V

Current - Supply (Max):: 4mA

Current - Output (Max):: 60mA

Output Type:: Open Drain

Features:: Temperature Compensated

Operating Temperature:: -40°C ~ 150°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Through Hole

Supplier Device Package:: 3-SIP

AH3762Q-P-B FAQ

1.How can I place an order for AH3762Q-P-B through Aetrix?

Please submit a Request for Quotation (RFQ) for AH3762Q-P-B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for AH3762Q-P-B reliable?

The price and inventory of AH3762Q-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3762Q-P-B is usually 5 days.

3.What payment methods are accepted for AH3762Q-P-B?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3762Q-P-B transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for AH3762Q-P-B?

AH3762Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your AH3762Q-P-B order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for AH3762Q-P-B?

For technical support, including AH3762Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3762Q-P-B requirements.

6.How does Aetrix verify that AH3762Q-P-B is sourced from the original manufacturer or authorized distributors?

All AH3762Q-P-B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AH3762Q-P-B meets industry standards.

7.What is the process for return or replacement of AH3762Q-P-B?

All AH3762Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3762Q-P-B, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The AH3762Q-P-B part is unused and in its original packaging.

Return procedure for AH3762Q-P-B:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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