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Diodes Incorporated AH375-PG-B
- Part No.:
- AH375-PG-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH375-PG-B.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,836
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Product details
Overview
AH375-PG-B from Diodes Incorporated is a bipolar Hall-effect latched sensor IC designed for electronic commutation in brushless DC motor and fan control systems. It features an integrated Hall plate, amplifier, Schmitt trigger with 60 Gauss hysteresis, open-drain output capable of 25 mA sink current, and operates from 2.2 V to 20 V across –40°C to +125°C ambient.
For engineers reviewing the AH375-PG-B datasheet, AH375-PG-B pinout, AH375-PG-B application, or AH375-PG-B equivalent, this page delivers verified technical context, package-specific pin mapping, magnetic switching thresholds (Bop = 5–60 G, Brp = –60 to –5 G), thermal derating curves, and direct alternatives for BLDC rotor position sensing.
Technical Context
The AH375-PG-B implements a single-phase latching architecture where magnetic polarity reversal determines output state retention: South-pole exposure above Bop (≥5 G) pulls OUT low; reversal below Brp (≤–5 G) releases it high. Its internal band-gap regulator enables stable operation across wide supply voltage (2.2–20 V) and temperature (–40°C to +125°C).
No external biasing or pull-up components are required - the open-drain output interfaces directly with MOSFET pre-drivers or logic-level inputs. Magnetic sensitivity is calibrated at 2.5 V minimum supply to ensure valid Bop/Brp behavior, and hysteresis (60 G typ.) suppresses noise-induced chatter during rotational transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.2 V to 20 V - supports direct connection to 3.3 V, 5 V, 12 V, or 24 V motor control rails without external regulation. |
| Output Type | Open-drain - enables wired-OR configuration, level-shifting, and direct drive of N-channel MOSFET gates. |
| Max Sink Current | 25 mA - sufficient to drive gate capacitance of small-to-medium power MOSFETs in BLDC half-bridge pre-driver stages. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive fan modules and industrial motor controllers. |
| Magnetic Hysteresis | 60 Gauss (typ.) - prevents false triggering during slow or noisy magnetic field transitions near switching thresholds. |
| Bop / Brp Range | 5–60 G / –60 to –5 G - enables reliable detection of standard ferrite or NdFeB rotor magnets at air gaps up to 2.5 mm. |
| Power Dissipation (SIP-3) | 550 mW at 25°C, derated linearly to 0 mW at 150°C - defines maximum continuous output duty cycle in sealed enclosures. |
Pinout & Package
AH375-PG-B is supplied in SIP-3 (Bulk Pack) package - a 3-pin single-inline package with straight leads, 14.0–15.0 mm body length, 2.8–3.2 mm width, and 3.9–4.3 mm height. Pin 1 = Vdd, Pin 2 = GND, Pin 3 = OUT.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vdd | Positive power supply input | Accepts 2.2–20 V DC; powers internal regulator, Hall plate, and output stage - no external decoupling required for <10 kHz switching. |
| 2 - GND | Ground reference | Common return path for Hall sensor, amplifier, and output transistor - must be low-impedance to avoid magnetic offset drift. |
| 3 - OUT | Open-drain output | Sinks up to 25 mA when active; requires external pull-up (e.g., 10 kΩ to 12 V) for logic-high state in commutation timing circuits. |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latching operation | Retains output state until magnetic polarity reversal - eliminates need for external latch or microcontroller polling in rotor position feedback. |
| Integrated temperature compensation | Stabilizes Bop/Brp thresholds over –40°C to +125°C - ensures consistent commutation timing across automotive and industrial thermal cycles. |
| Wide supply range (2.2–20 V) | Eliminates dedicated LDO for Hall sensor in multi-rail motor drives - reduces BOM count and PCB area in fan and pump modules. |
| RoHS-compliant & halogen-free | Meets IEC 61249-2-21 and JEDEC J-STD-020 standards - supports export compliance for EU, China RoHS, and Japan J-Moss programs. |
Applications
| BLDC Motor Commutation | Brushless Fan Control |
|---|---|
Use Scenario: Rotor position sensing in 3-phase BLDC motors used in HVAC blowers and power tools. IC Role / Device Role / Timing Role: Provides digital edge-aligned Hall signals to MCU or gate driver IC for precise 120° electrical phase alignment. Use Value: Enables efficient trapezoidal commutation with <1° timing jitter due to 60 G hysteresis and fast response (<5 µs propagation delay). |
Use Scenario: Speed regulation and stall detection in 12 V/24 V brushless cooling fans for servers and telecom equipment. IC Role / Device Role / Timing Role: Generates tachometer pulses and direction-indicating latched outputs for closed-loop RPM control. Use Value: Delivers robust zero-crossing detection even under EMI-rich environments near switching PSUs, thanks to Schmitt-trigger noise rejection. |
| Revolution Counting | Speed Measurement |
Use Scenario: Bidirectional rotation counting in industrial conveyors and metering pumps using dual-Hall setups. IC Role / Device Role / Timing Role: Outputs quadrature-compatible A/B phase signals when paired with second AH375 or complementary Hall sensor. Use Value: Supports 1x/2x/4x interpolation modes via external logic - achieves ±1 pulse per revolution accuracy at ≤10 kRPM. |
Use Scenario: Real-time RPM monitoring in automotive radiator fans and e-bike motor controllers. IC Role / Device Role / Timing Role: Converts magnetic pole transitions into TTL-compatible pulse trains fed to microcontroller timer capture units. Use Value: Maintains signal integrity up to 50 kHz pulse frequency (100 kRPM @ 2-pole pair), validated per DS31172 Rev. 8 test data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latching sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AH3774-WG-7 | Successor device with tighter Bop/Brp tolerance (±5 G vs ±25 G), lower quiescent current (1.5 mA vs 2–4 mA), SC59-only packaging. | Designed for high-precision commutation in space-constrained applications (e.g., drone ESCs); lacks SIP-3 option. | Select AH3774-WG-7 when upgrading legacy AH375 designs requiring improved magnetic repeatability and smaller footprint. |
| US5883LUA-AAA-000 | Unipolar latch (not bipolar); Bop = 35 G, Brp = 25 G; same SIP-3 package; 3.3–24 V supply; 20 mA sink. | Requires magnet polarity reversal for reset - unsuitable for true bipolar rotor tracking but usable in unidirectional speed sensing. | Choose US5883LUA-AAA-000 only for cost-sensitive, unidirectional fan tachometer applications where polarity independence is unnecessary. |
Compared with AH375-PG-B, AH3774-WG-7 offers higher magnetic precision and lower power in SC59, while US5883LUA-AAA-000 provides SIP-3 compatibility at lower cost but sacrifices bipolar functionality - selection depends on whether rotor direction sensing, package fit, or production volume drives the decision.
Availability
AH375-PG-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, cooling fan control, revolution counting, and speed measurement applications requiring stable component supply despite its obsolete status.
Supply support for AH375-PG-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 manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in IATF 16949-certified facilities.
The AH375 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust rotor position feedback in automotive and industrial BLDC systems - emphasizing latch stability, wide-voltage operation, and thermal resilience.
FAQ
Is AH375-PG-B still in production?
No - AH375-PG-B is officially discontinued and marked obsolete per Diodes' DS31172 Rev. 8 (August 2022). It remains available through authorized distributors and Aetrix Electronics' legacy inventory, with full traceability and documented shelf-life compliance. Engineering support and cross-reference guidance to AH3774 are provided for migration planning.
What is the difference between AH375-PG-B and AH375-PG-A?
AH375-PG-B uses SIP-3 Bulk Pack (straight leads, 1000 pcs/bulk), while AH375-PG-A uses SIP-3 Ammo Pack (spread leads, 4000 pcs/box). Both share identical die, electrical specs, and marking (375 top-side code), differing only in lead form and packaging format - no functional or reliability distinction exists between them.
Can AH375-PG-B operate from a 3.3 V supply?
Yes - AH375-PG-B functions at 3.3 V, but magnetic performance (Bop/Brp) is only guaranteed above 2.5 V per Note 4 in DS31172. At 3.3 V, typical Bop = 30 G and Brp = –30 G with 60 G hysteresis, enabling reliable detection of standard rotor magnets at ≤1.8 mm air gap in low-voltage BLDC designs.
Does AH375-PG-B require an external pull-up resistor?
Yes - its open-drain output requires an external pull-up resistor to define the logic-high voltage level. A 10 kΩ resistor to Vdd (e.g., 12 V) is recommended per typical application circuit on page 2 of DS31172; values between 4.7 kΩ and 47 kΩ are acceptable depending on rise time and bus loading requirements.
AH375-PG-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 6mT Trip, -6mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 2.2V ~ 20V
- Current - Supply (Max):
- 2mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Drain
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH375-PG-B FAQ
1.How can I place an order for AH375-PG-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH375-PG-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 AH375-PG-B reliable?
The price and inventory of AH375-PG-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH375-PG-B is usually 5 days.
3.What payment methods are accepted for AH375-PG-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH375-PG-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH375-PG-B?
AH375-PG-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH375-PG-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 AH375-PG-B?
For technical support, including AH375-PG-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH375-PG-B requirements.
6.How does Aetrix verify that AH375-PG-B is sourced from the original manufacturer or authorized distributors?
All AH375-PG-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 AH375-PG-B meets industry standards.
7.What is the process for return or replacement of AH375-PG-B?
All AH375-PG-B units undergo pre-shipment inspection (PSI). If there is an issue with AH375-PG-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 AH375-PG-B part is unused and in its original packaging.
Return procedure for AH375-PG-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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