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Diodes Incorporated AH175-PL-A-A
- Part No.:
- AH175-PL-A-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH175-PL-A-A.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,648
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Product details
Overview
AH175-PL-A-A from Diodes Incorporated is a bipolar Hall-effect latch sensor designed for high-temperature rotor position and RPM sensing in 3-phase BLDC motor control systems. It operates from 3.5V to 20V, delivers 25mA sink current, features open-collector pre-driver output, and supports -40°C to +150°C ambient operation with ±30–120 Gauss magnetic hysteresis.
For engineers reviewing the AH175-PL-A-A datasheet, AH175-PL-A-A pinout, AH175-PL-A-A application, or AH175-PL-A-A equivalent, this page provides verified functional specifications, validated SIP-3 and SC59 package mappings, confirmed magnetic switching thresholds (Bop/Brp), thermal derating curves, and direct alternatives for legacy motor-sensing designs.
Technical Context
The AH175 integrates a Hall voltage generator, amplifier, comparator with built-in hysteresis, and open-collector pre-driver stage-all powered by an internal band-gap regulator enabling stable operation across 3.5–20V supply and full automotive temperature range. Its bipolar latching behavior requires magnetic polarity reversal (South-to-brand-side) to toggle between ON and OFF states.
Switching is defined by two magnetic thresholds: Bop (15–60 Gauss, A-grade) and Brp (-60 to -15 Gauss, A-grade), yielding 30–120 Gauss hysteresis for robust noise immunity. Output saturation voltage remains ≤400mV at 10mA sink, and supply current stays ≤6mA in OFF state at 12V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5V to 20V DC - Enables direct connection to 12V automotive rails or industrial 24V systems without external regulation. |
| Operating Temperature | -40°C to +150°C - Qualified for under-hood motor control and high-temp industrial encoders without derating. |
| Output Sink Current | 25mA - Drives standard optocoupler inputs or logic-level MOSFET gates directly. |
| Magnetic Hysteresis | 30–120 Gauss - Prevents chatter during slow or noisy magnetic transitions in rotating machinery. |
| Output Type | Open-collector pre-driver - Allows flexible pull-up selection and interface with 3.3V, 5V, or 12V logic domains. |
| Power Dissipation | 550mW (SIP-3), 230mW (SC59) at 25°C - Requires thermal design consideration above 85°C per published derating curves. |
Pinout & Package
The AH175-PL-A-A is supplied in SIP-3 (Ammo Pack) and SC59 (SOT23-equivalent) packages. SIP-3 uses straight leads; SC59 uses gull-wing surface-mount configuration. Both share identical 3-pin topology.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc (Pin 1) | Positive power supply input | Accepts 3.5–20V DC; powers internal regulator, Hall element, and output stage. |
| GND (Pin 2) | Ground reference | Common return path for supply and output current; must be low-impedance for noise immunity. |
| OUT (Pin 3) | Open-collector output | Sinks up to 25mA when active; requires external pull-up resistor to define logic HIGH level. |
Key Features
| Feature | Design Value |
|---|---|
| Built-in power reverse protection | Withstands accidental Vcc/GND swap without damage-eliminates need for external diode in field-deployed motors. |
| Temperature-compensated band-gap regulator | Maintains stable internal bias over -40°C to +150°C-ensures consistent Bop/Brp thresholds across full operating range. |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU with <900ppm Br, <900ppm Cl, <1000ppm Sb-certified for global automotive and industrial shipments. |
| High ESD tolerance | Qualified to >4kV HBM per JEDEC JESD22-A114-reduces failure risk during PCB handling and assembly. |
Applications
| Three-Phase BLDC Motor Rotor Position Sensing | Automotive Fan Speed Monitoring |
|---|---|
Use Scenario: Detecting commutation timing of permanent magnet rotors in HVAC blower or EPS assist motors. IC Role / Device Role / Timing Role: Bipolar latch providing digital edge-aligned signals to motor driver IC for precise 120° electrical phase alignment. Use Value: 30–120 Gauss hysteresis prevents false triggering from vibration-induced flux oscillation near zero-crossing points. | Use Scenario: Measuring fan blade passage frequency in engine cooling modules exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Magnetic RPM transducer converting rotational speed into TTL-compatible pulse train for ECU tachometer input. Use Value: -40°C to +150°C operation eliminates need for external thermal shielding or derating in proximity to exhaust manifolds. |
| Industrial Conveyor Belt Encoder Feedback | Electric Power Steering (EPS) Angle Detection |
Use Scenario: Counting gear teeth on conveyor drive shafts in dusty, high-vibration factory environments. IC Role / Device Role / Timing Role: Robust magnetic switch generating clean square-wave pulses for PLC motion controller quadrature decoding. Use Value: Open-collector output allows direct interfacing with 24V industrial PLC inputs using 4.7kΩ pull-up resistors. | Use Scenario: Sensing steering column rotation via magnetized gear in dual-redundant EPS torque-angle modules. IC Role / Device Role / Timing Role: Safety-critical position latch providing fail-safe directional indication to ASIL-B microcontroller. Use Value: Internal reverse-polarity protection prevents latch damage during battery jump-start events or wiring faults. |
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 | Higher sensitivity (Bop: 5–35 Gauss), lower ICC (2.5mA), SC59-only packaging | Optimized for low-power battery-operated sensors; lacks SIP-3 option | Select for new designs requiring tighter magnetic threshold control and reduced quiescent draw. |
| US1881 | Unipolar operation, 2.7–24V supply, 50mA sink, TO-92/SIP-3 packaging | Non-latching behavior requires continuous field presence; unsuitable for position memory | Use only where unidirectional detection suffices and polarity reversal is not required. |
Compared with AH175-PL-A-A, AH3724 offers improved magnetic resolution and lower power but forfeits SIP-3 availability; US1881 provides higher drive strength but cannot retain state without sustained magnetic field-making it incompatible for rotor position latching.
Availability
AH175-PL-A-A is available at Aetrix Electronics and suitable for three-phase BLDC motor control, automotive fan speed monitoring, and industrial conveyor encoder feedback requiring stable component supply across extended temperature ranges.
Supply support for AH175-PL-A-A 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 manufacturer specializing in discrete, analog, and mixed-signal devices for industrial, automotive, and consumer markets.
The AH175 belongs to Diodes' Hall-effect sensor product line, engineered specifically for high-reliability magnetic position sensing in harsh thermal and electromagnetic environments.
FAQ
What is the magnetic polarity requirement for AH175-PL-A-A actuation?
The AH175-PL-A-A activates when a South pole approaches the branded side of the package (B > Bop), and releases only when the same South pole retreats below Brp. It does not respond to North pole exposure-requiring correct magnet orientation during mechanical integration.
Can AH175-PL-A-A operate reliably at 150°C junction temperature?
No-maximum junction temperature is +150°C, but ambient operation at +150°C requires zero power dissipation. At 25°C ambient, maximum allowable power is 550mW (SIP-3) or 230mW (SC59); derating curves show PD = 0 at TA = +150°C, so real-world use must stay below that limit with appropriate heatsinking or airflow.
Is AH175-PL-A-A qualified to AEC-Q100?
No-AH175-PL-A-A is not AEC-Q100 qualified. The datasheet explicitly states that automotive-qualified parts require separate PPAP-capable manufacturing in IATF 16949 facilities; this variant is NRND (Not Recommended for New Design) and intended for legacy industrial use only.
Why does AH175-PL-A-A use open-collector instead of push-pull output?
The open-collector architecture enables flexible voltage translation: users select pull-up voltage (3.3V, 5V, 12V, or 24V) independent of Vcc, simplifies wired-OR configurations for multi-sensor fault detection, and avoids shoot-through current in noisy motor-drive environments where simultaneous high-side/low-side switching could occur.
AH175-PL-A-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 6mT Trip, -6mT Release
- Test Condition:
- 25°C
- Voltage - Supply:
- 3.5V ~ 20V
- Current - Supply (Max):
- 6mA
- Current - Output (Max):
- 25mA
- Output Type:
- Open Collector
- Features:
- Temperature Compensated
- Operating Temperature:
- -40°C ~ 150°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 3-SIP
AH175-PL-A-A FAQ
1.How can I place an order for AH175-PL-A-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH175-PL-A-A 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 AH175-PL-A-A reliable?
The price and inventory of AH175-PL-A-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH175-PL-A-A is usually 5 days.
3.What payment methods are accepted for AH175-PL-A-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH175-PL-A-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH175-PL-A-A?
AH175-PL-A-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH175-PL-A-A 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 AH175-PL-A-A?
For technical support, including AH175-PL-A-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH175-PL-A-A requirements.
6.How does Aetrix verify that AH175-PL-A-A is sourced from the original manufacturer or authorized distributors?
All AH175-PL-A-A 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 AH175-PL-A-A meets industry standards.
7.What is the process for return or replacement of AH175-PL-A-A?
All AH175-PL-A-A units undergo pre-shipment inspection (PSI). If there is an issue with AH175-PL-A-A, 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 AH175-PL-A-A part is unused and in its original packaging.
Return procedure for AH175-PL-A-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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