My Inquiry
My Account
Diodes Incorporated AH372-W-7
- Part No.:
- AH372-W-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- SC-59-6
- Datasheet:
-
AH372-W-7.pdf
- Description:
- MAGNETIC SWITCH LATCH SC59-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AH372-W-7 from Diodes Incorporated is a bipolar Hall-effect latch sensor in SC59 package with internal pullup resistor, 2.2–20 V supply range, -40°C to +125°C operation, 25 mA sink capability, and magnetic switching thresholds of BOP = 5–60 Gauss / BRP = -60 to -5 Gauss. It serves as a contactless rotor position sensor in three-phase BLDC motor commutation systems.
For engineers reviewing the AH372-W-7 datasheet, AH372-W-7 pinout, AH372-W-7 application, or AH372-W-7 equivalent, key selection criteria include magnetic hysteresis (BHY ≥ 60 Gauss), internal pullup value (7–13 kΩ), output saturation voltage (≤400 mV at 20 mA), thermal derating in SC59 (230 mW @ 25°C), and AEC-Q100 suitability for automotive motor control.
Technical Context
The AH372-W-7 integrates a Hall plate, amplifier, comparator with hysteresis, and open-drain output driver with built-in 7–13 kΩ pullup resistor. Its bandgap regulator enables stable internal biasing across 2.2–20 V supply and full functionality above 2.5 V.
Magnetic actuation is polarity-sensitive: South pole toward marking side triggers turn-on (BOP = 5–60 Gauss) for SIP-3/SOT23/SC59; North pole required for SC59 per datasheet polarity note. Output remains latched until reverse field falls below BRP (-60 to -5 Gauss), providing noise-immune digital position feedback.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.2 V to 20 V - supports wide-input industrial and automotive power rails without external regulation |
| Output Sink Current | 25 mA - drives standard logic inputs and small relays directly without buffer stage |
| Operating Temperature | -40°C to +125°C - qualified for under-hood and industrial motor control environments |
| Magnetic Hysteresis | ≥60 Gauss - prevents chatter in noisy magnetic fields near switching thresholds |
| Internal Pullup Resistor | 7–13 kΩ - eliminates need for external pullup, reducing BOM count and PCB area |
| Output Saturation Voltage | ≤400 mV @ 20 mA - ensures clean low-state logic compatibility with 3.3 V and 5 V controllers |
| Power Dissipation (SC59) | 230 mW @ 25°C - derates linearly to 0 mW at 150°C, defining max ambient for continuous operation |
Pinout & Package
Package: SC59 - 3-pin single-inline package with gull-wing leads, 2.80–3.10 mm body height, 2.70–3.00 mm width, and Hall sensor die located beneath marking surface aligned to Pin 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Positive supply input - accepts 2.2–20 V; internal regulator derives bias for Hall plate and comparator |
| 2 | GND | Ground reference - return path for Hall plate, amplifier, and output driver; must be low-impedance |
| 3 | OUT | Open-drain output with internal pullup - sinks current when active (low); high-impedance when inactive (pulled high internally) |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latch operation | Requires alternating North/South magnetic poles to toggle state - ideal for rotary position sensing with magnetized gear teeth |
| Integrated pullup resistor | 7–13 kΩ on-chip - removes external component, simplifies layout, improves ESD robustness vs. discrete pullup |
| Wide supply range | 2.2–20 V operation - accommodates battery-fed systems (12 V nominal) and industrial 24 V rails without LDO |
| High-temperature rating | -40°C to +125°C - meets automotive engine bay and industrial motor drive thermal requirements |
| Low-output saturation | ≤400 mV @ 20 mA - guarantees TTL/CMOS-compatible low-level output even under full load |
Applications
| BLDC Motor Commutation | Rotary Encoder Feedback |
|---|---|
Use Scenario: Detecting rotor magnet polarity in 3-phase brushless DC motors to sequence phase winding energization. IC Role / Device Role / Timing Role: Digital position sensor providing synchronized edge-triggered signals to motor gate driver logic. Use Value: Enables precise 6-step commutation with <60 Gauss hysteresis preventing false triggering during rapid rotation. | Use Scenario: Counting gear tooth transitions on rotating shafts for speed and direction measurement. IC Role / Device Role / Timing Role: Contactless magnetic switch generating quadrature or single-channel pulse trains for microcontroller input capture. Use Value: Delivers 25 mA sink drive into MCU GPIO without external buffering, supporting RPM monitoring up to 20,000 RPM. |
| RPM Monitoring System | Contactless Current Switch |
Use Scenario: Measuring rotational speed of fans, pumps, or conveyors via magnetic target wheel. IC Role / Device Role / Timing Role: Pulse generator whose frequency correlates directly to shaft speed; used with timer peripherals. Use Value: Stable 2.2–20 V operation allows direct connection to 12 V vehicle power, eliminating level-shifting circuitry. | Use Scenario: Detecting current flow through a conductor by sensing its magnetic field using a current-carrying loop or busbar. IC Role / Device Role / Timing Role: Threshold-based magnetic field detector enabling solid-state relay replacement in overload protection circuits. Use Value: Internal 7–13 kΩ pullup reduces component count while maintaining fast response (<5 µs propagation delay typical). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3724 | Successor device with improved BOP/BRP stability over temperature and tighter hysteresis tolerance (±10% vs ±25%) | Drop-in replacement for new designs; same SC59 footprint and pinout; higher reliability in automotive-grade production | Select AH3724 for new designs requiring AEC-Q100 qualification and extended lifetime performance consistency |
| AL372W | Same SC59 package but with lower supply range (3.0–24 V), no internal pullup, and higher BOP (15–70 Gauss) | Requires external pullup; better suited for high-noise environments where stronger magnetic fields are available | Choose AL372W only if external pullup is acceptable and system uses >15 Gauss magnetic sources |
Compared with AH372-W-7, AH3724 offers tighter magnetic parameter tolerances and AEC-Q100 support for automotive use, while AL372W trades internal pullup for higher magnetic sensitivity-making AH372-W-7 optimal for cost-sensitive, space-constrained legacy designs needing integrated pullup and wide supply flexibility.
Availability
AH372-W-7 is available at Aetrix Electronics and suitable for BLDC motor commutation, rotary encoder feedback, RPM monitoring systems, and contactless current switches requiring stable component supply across industrial and automotive temperature ranges.
Supply support for AH372-W-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The AH372 belongs to Diodes' Hall-effect sensor product line, designed specifically for robust, contactless position and speed sensing in harsh thermal and electromagnetic environments.
FAQ
What is the magnetic polarity requirement for AH372-W-7 activation?
For the SC59 package (AH372-W-7), the North pole must be presented to the part marking side to activate the output (turn ON). This is explicitly defined in the magnetic characteristics table for SC59, differing from SIP-3 and SOT23 variants that require South pole activation.
Does AH372-W-7 require an external bypass capacitor?
Yes - a 100 nF ceramic capacitor between VDD and GND is recommended per the Typical Application Circuit. It stabilizes the internal regulator and enhances noise immunity, especially in electrically noisy motor control environments where supply ripple may exceed 100 mVpp.
Can AH372-W-7 operate reliably at 2.2 V supply?
It powers on and outputs a logic signal at 2.2 V, but magnetic performance (BOP/BRP) is not guaranteed until VDD exceeds 2.5 V. For consistent switching behavior across temperature and magnetic field variations, design for minimum 2.5 V supply in operational conditions.
Is AH372-W-7 qualified to AEC-Q100?
No - AH372-W-7 is not AEC-Q100 qualified. Diodes states that automotive-grade parts require specific change control and PPAP capability; users needing AEC-Q100 should select the AH3724, the designated successor with formal automotive qualification and IATF 16949 manufacturing.
AH372-W-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-59-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Last Time Buy
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- North Pole, South Pole
- Sensing Range:
- 5mT Trip, -5mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.2V ~ 20V
- Current - Supply (Max):
- 4mA
- Current - Output (Max):
- 25mA
- Output Type:
- Analog Voltage
- Features:
- -
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-59-6
AH372-W-7 FAQ
1.How can I place an order for AH372-W-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AH372-W-7 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 AH372-W-7 reliable?
The price and inventory of AH372-W-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH372-W-7 is usually 5 days.
3.What payment methods are accepted for AH372-W-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH372-W-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH372-W-7?
AH372-W-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH372-W-7 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 AH372-W-7?
For technical support, including AH372-W-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH372-W-7 requirements.
6.How does Aetrix verify that AH372-W-7 is sourced from the original manufacturer or authorized distributors?
All AH372-W-7 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 AH372-W-7 meets industry standards.
7.What is the process for return or replacement of AH372-W-7?
All AH372-W-7 units undergo pre-shipment inspection (PSI). If there is an issue with AH372-W-7, 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 AH372-W-7 part is unused and in its original packaging.
Return procedure for AH372-W-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AH372-W-7 Tags
-
TCS40DLR,LF
Toshiba Semiconductor and Storage
-
DRV5032FBDBZR
Texas Instruments
-
DRV5032FADBZR
Texas Instruments
-
AH1912-FA-7
Diodes Incorporated
-
AH1913-W-7
Diodes Incorporated
-
AH1911-W-7
Diodes Incorporated
-
TLI49631MXTSA1
Infineon Technologies
-
SM453R
Honeywell Sensing and Productivity Solutions
-
MLX90248ESE-EBA-000-RE
Melexis Technologies NV
-
MLX92213ELD-AAA-000-RE
Melexis Technologies NV
-
TLE4913HTSA1
Infineon Technologies
-
US5781ESE-AAA-000-RE
Melexis Technologies NV
Tech Hub
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
