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Diodes Incorporated AH3272Q-P-B
- Part No.:
- AH3272Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH3272Q-P-B.pdf
- Description:
- Hall Latch Switch SIP-3 BULK 1K
- Quantity:
- Payment:
- Shipping:
Inventory:966
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Product details
Overview
AH3272Q-P-B from Diodes Incorporated is an AEC-Q100 qualified two-wire automotive Hall-effect latch switch IC in SIP-3 package, designed for magnetic position sensing in harsh environments. It operates from 2.7V to 27V, features BOP = 15–45 G and BRP = –45 to –15 G (south-pole active), delivers 3.3 mA off-state current, and supports –40°C to +150°C ambient operation - deployed in gear position detection and door/trunk closure systems.
For engineers reviewing the AH3272Q-P-B datasheet, AH3272Q-P-B pinout, AH3272Q-P-B application, or AH3272Q-P-B equivalent, key selection criteria include latch-mode magnetic hysteresis, two-wire current-sinking output architecture, thermal shutdown at +190°C, reverse supply protection down to –32V, and compatibility with high-vibration automotive mechanical assemblies.
Technical Context
The AH3272Q-P-B implements a chopper-stabilized Hall sensor with dynamic offset cancellation and internal bandgap-regulated biasing, enabling stable switching thresholds across temperature. Its latch functionality requires magnetic polarity reversal (south-to-north transition) to reset output state, with typical response delay of 7 μs and 1000 kHz chopping frequency for EMI resilience.
It integrates reverse-blocking diode + zener clamp on VDD, UVLO at 2.2–2.7 V, overtemperature shutdown at +190°C junction with auto-restart at +180°C, and meets HBM ESD 8 kV / CDM 1 kV - all within a single-die SIP-3 package optimized for PCB space-constrained automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 27 V - supports direct battery connection across cold-crank (6.5 V) and load-dump (27 V) transients without external regulation. |
| Operating Point (BOP) | 15–45 G at +25°C - enables reliable actuation with low-strength magnets in compact mechanical gaps (e.g., gear selector levers). |
| Release Point (BRP) | –45 to –15 G - provides 30–60 G hysteresis to prevent chatter during slow or oscillating magnetic field transitions. |
| Off-State Current (IOFF) | 3.3 mA max - defines minimum system power draw in quiescent state for always-on vehicle modules (e.g., door open detection). |
| Response Delay Time | 7 μs max - ensures real-time feedback for fast-moving components like transmission shift actuators. |
| Junction Temp Limit | +190°C shutdown threshold - protects against thermal runaway in under-hood locations near exhaust manifolds or powertrain ECUs. |
| ESD Rating | HBM 8 kV / CDM 1 kV - exceeds ISO 10605 requirements for assembly-line handling and in-vehicle electrostatic discharge events. |
Pinout & Package
SIP-3 (Bulk Pack) package: 3-pin single-inline package with gull-wing leads, 14.5 mm body length, 3.0 mm width, and 1.5 mm height - optimized for automated through-hole insertion and wave soldering in automotive control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDD | Supply voltage input | Accepts 2.7–27 V DC; includes integrated reverse-blocking diode and zener clamp for ±32 V fault tolerance. |
| 2 - NC | No-connect terminal | Internally unconnected; may be tied to VDD, GND, or left floating - no electrical impact on latch operation. |
| 3 - GND | Ground reference | Return path for internal regulator, Hall element, and output stage; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized Hall sensing | Eliminates offset drift <±0.1 G/°C, enabling stable BOP/BRP over –40°C to +150°C without calibration. |
| Two-wire latch output | Sinks current when south pole exceeds BOP; holds state until north pole exceeds |BRP| - reduces wiring count vs. three-wire switches. |
| Integrated thermal protection | Shuts down at +190°C junction and auto-restarts at +180°C - prevents permanent damage during sustained overtemperature exposure. |
| UVLO with 2.2–2.7 V threshold | Blocks output activation below valid supply, avoiding erratic behavior during battery brownouts or ignition cycling. |
| AEC-Q100 Grade 0 qualification | Validated for –40°C to +150°C operation with PPAP documentation support - meets OEM requirements for powertrain and chassis modules. |
Applications
| Seatbelt Buckle Detection | Gear Position Sensing |
|---|---|
|
Use Scenario: Detect buckle engagement status in driver/passenger seats using magnet-actuated reed switch replacement. IC Role / Device Role / Timing Role: Latch switch outputs current only when magnet is present (buckle closed); maintains state during vibration or transient field loss. Use Value: Eliminates mechanical wear and contact bounce; supports ASIL-B functional safety via predictable hysteresis and thermal fail-safe. |
Use Scenario: Identify PRNDL position in automatic transmissions using rotating cam with embedded magnets. IC Role / Device Role / Timing Role: Two-wire latch reports gear selection as persistent current state - no microcontroller polling required. Use Value: Reduces harness weight and connector count; withstands oil immersion and 50g shock per SAE J1211. |
| Door/Trunk Closure Monitoring | Wiper Arm Position Feedback |
|
Use Scenario: Confirm door or trunk lid fully latched via striker-mounted magnet activating Hall sensor in pillar or latch assembly. IC Role / Device Role / Timing Role: Provides fail-safe "closed" signal that persists after magnet removal - critical for anti-theft and lighting control logic. Use Value: Enables low-power always-on monitoring (<3.3 mA) without wake-up interrupts; immune to EMI from adjacent motors or solenoids. |
Use Scenario: Track wiper blade home position during park cycle using magnet on linkage and fixed Hall sensor in motor housing. IC Role / Device Role / Timing Role: Latch output remains asserted until wiper passes park point and magnet reverses polarity - defines absolute zero-reference. Use Value: Replaces optical encoders with higher reliability in wet/dirty conditions; supports IP67 sealing due to solid-state construction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Allegro A1220LLHLT-T | Three-wire interface (VDD, GND, OUT); ±2.5 mT BOP; SOIC-8 package | Requires separate output trace; less suitable for space-constrained two-wire harnesses | Preferred where board area allows SOIC and discrete pull-up is acceptable |
| Melexis US1881EUA-ABA-002-REEL | Two-wire latch; 2.5–24 V supply; TO-92 package; BOP = 15–35 G | TO-92 limits reflow compatibility and mechanical robustness in automotive vibration | Used in cost-sensitive non-safety modules where SIP-3 mounting isn't required |
Compared with AH3272Q-P-B, A1220LLHLT-T offers higher precision but adds wiring complexity, while US1881EUA-ABA-002-REEL sacrifices AEC-Q100 qualification and thermal derating margin for lower unit cost - AH3272Q-P-B uniquely balances two-wire simplicity, SIP-3 manufacturability, and full automotive qualification.
Availability
AH3272Q-P-B is available at Aetrix Electronics and suitable for gear position sensing, door/trunk closure monitoring, seatbelt buckle detection, and wiper arm position feedback requiring stable component supply across automotive production lifecycles.
Supply support for AH3272Q-P-B 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 and AEC-Q100 product validation infrastructure.
AH3272Q-P-B belongs to the AH32xxQ automotive Hall-effect switch family, engineered specifically for robust two-wire magnetic sensing in engine bay, chassis, and cabin modules where reliability under thermal stress and electrical transients is mandatory.
FAQ
What is the magnetic polarity requirement for AH3272Q-P-B actuation?
The AH3272Q-P-B is south-pole active: it turns on when a south pole exceeds its BOP (15–45 G), and remains latched until a north pole exceeds |BRP| (–45 to –15 G). This polarity behavior is fixed and cannot be inverted via external circuitry - magnet orientation must match datasheet-defined sensing surface (marked side of SIP-3 package).
Can AH3272Q-P-B operate directly from a 24V truck battery?
Yes - AH3272Q-P-B supports 2.7V to 27V supply range and includes integrated reverse-blocking diode plus zener clamp, enabling direct connection to 24V systems. It tolerates load-dump transients up to +32V for ≤500ms and reverse battery conditions down to –32V, eliminating need for external protection components in commercial vehicle applications.
Is AH3272Q-P-B pin-compatible with other AH32xxQ variants?
Yes - all AH32xxQ devices (including AH3231Q–AH3234Q and AH3270Q–AH3272Q) share identical SIP-3 and SC59 pinouts: Pin 1 = VDD, Pin 2 = NC, Pin 3 = GND. However, magnetic thresholds (BOP/BRP), output polarity (direct/inverted), and off-state current differ - substitution requires validation of system-level magnetic design and timing margins.
Does AH3272Q-P-B require an external decoupling capacitor?
Yes - a ≥100 nF ceramic capacitor must be placed between VDD and GND, located as close as possible to the IC pins. This stabilizes internal regulator operation, suppresses supply noise from nearby motors or solenoids, and ensures reliable chopper clocking; omission risks erratic switching or failure to meet specified tD (7 μs) response time.
AH3272Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 4.5mT Trip, -4.5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.7V ~ 27V
- Current - Supply (Max):
- 5mA
- Current - Output (Max):
- -
- Output Type:
- Current Source
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH3272Q-P-B FAQ
1.How can I place an order for AH3272Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3272Q-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 AH3272Q-P-B reliable?
The price and inventory of AH3272Q-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 AH3272Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3272Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3272Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3272Q-P-B?
AH3272Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3272Q-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 AH3272Q-P-B?
For technical support, including AH3272Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3272Q-P-B requirements.
6.How does Aetrix verify that AH3272Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3272Q-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 AH3272Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3272Q-P-B?
All AH3272Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3272Q-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 AH3272Q-P-B part is unused and in its original packaging.
Return procedure for AH3272Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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