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Diodes Incorporated AH175-PG-A-A
- Part No.:
- AH175-PG-A-A
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP, Formed Leads
- Datasheet:
-
AH175-PG-A-A.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,582
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Product details
Overview
AH175-PG-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 built-in reverse-polarity protection.
For engineers reviewing the AH175-PG-A-A datasheet, AH175-PG-A-A pinout, AH175-PG-A-A application, or AH175-PG-A-A equivalent, this page provides verified magnetic switching thresholds (Bop: 15–60 G, Brp: –60 to –15 G), thermal derating curves, SIP-3 package mechanical dimensions, and direct substitution guidance versus AH3724.
Technical Context
The AH175 integrates a Hall voltage generator, amplifier, comparator with hysteresis (30–120 G), and open-collector pre-driver - all powered by an internal band-gap regulator enabling stable operation across its 3.5–20V supply range. Its bipolar latching behavior requires magnetic polarity reversal to toggle state.
It exhibits Bop/Brp asymmetry optimized for robust commutation timing in motor feedback loops, with saturation voltage ≤400 mV at 10 mA sink and supply current ≤6 mA in quiescent mode. Thermal performance is defined per package: SIP-3 (550 mW @ 25°C) and SC59 (230 mW @ 25°C), with linear derating to zero at +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5 V to 20 V DC - enables direct connection to automotive battery rails without external regulation |
| Operating Temperature | −40°C to +150°C - qualified for under-hood and powertrain-mounted motor sensing |
| Output Sink Current | 25 mA - drives standard optocouplers or logic-level MOSFET gates directly |
| Magnetic Hysteresis | 30–120 Gauss - prevents chatter during slow or noisy field transitions in rotating machinery |
| Output Type | Open-collector pre-driver - allows flexible pull-up configuration and interface with 3.3V/5V/12V logic domains |
| Power Dissipation (SIP-3) | 550 mW at 25°C, derated linearly to 0 mW at 150°C - defines maximum continuous duty in sealed enclosures |
| Reverse Polarity Protection | Built-in - eliminates need for external series diode in battery-connected applications |
Pinout & Package
The AH175-PG-A-A is supplied in SIP-3 (Ammo Pack) package - a 3-pin single-inline package with gull-wing leads, 14.0–15.0 mm body length, and branded surface marking "175".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Vcc | Positive power supply input | Accepts 3.5–20 V DC; powers internal regulator and sensing circuitry |
| GND | Ground reference | Return path for supply and output current; must be low-impedance for noise immunity |
| OUT | Open-collector digital output | Sinks up to 25 mA when active; requires external pull-up for logic-high level definition |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latching operation | Requires South-pole activation (Bop ≥15 G) and North-pole release (Brp ≤−15 G) - ensures deterministic state retention in rotating fields |
| Wide supply range with internal regulation | 3.5–20 V operation via on-chip band-gap regulator - eliminates external LDO in 12 V automotive systems |
| High-temperature reliability | Specified performance from −40°C to +150°C ambient - validated for engine compartment and inverter-integrated motor feedback |
| Integrated reverse-voltage protection | No external diode required for battery-reversal scenarios - reduces BOM count and PCB area in cost-sensitive designs |
| RoHS-3 and halogen-free compliance | Meets EU Directive 2015/863/EU; <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies Tier-1 automotive material declarations |
Applications
| Motor Commutation Sensing | Rotor Position Feedback |
|---|---|
|
Use Scenario: Detecting magnetic pole transitions in 3-phase BLDC motors for electronic commutation. IC Role / Device Role / Timing Role: Digital latch providing synchronized edge-triggered signals to motor driver logic. Use Value: Enables precise 120° electrical phase alignment with ±5° timing margin over full temperature range. |
Use Scenario: Monitoring angular position of permanent magnet rotors in HVAC blower and power steering motors. IC Role / Device Role / Timing Role: Bipolar latch capturing absolute North/South transitions for position indexing. Use Value: Delivers repeatable switching points (Bop/Brp) with <10% variation across −40°C to +150°C. |
| Current Switch Interface | RPM Detection in Industrial Drives |
|
Use Scenario: Converting magnetic field changes from current-carrying conductors into digital enable/disable signals. IC Role / Device Role / Timing Role: High-immunity latch isolating control logic from high-current paths via magnetic coupling. Use Value: Operates reliably with >40 dB noise rejection due to 30–120 G hysteresis and internal comparator filtering. |
Use Scenario: Measuring rotational speed of gear-driven shafts using ferrous toothed wheels and stationary magnets. IC Role / Device Role / Timing Role: Edge-counting input device generating clean pulses per revolution for microcontroller timers. Use Value: Supports up to 20 kHz pulse rates with <1 µs propagation delay variation across supply and temperature. |
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 G), lower VCC min (2.5 V), SC59-only packaging | Better suited for low-field, low-voltage portable or battery-powered systems | Select AH3724 for new designs requiring wider magnetic dynamic range or smaller footprint |
| US1881 | Unipolar operation, no hysteresis spec, 20 mA sink, same SIP-3/SC59 options | Limited to simple proximity detection; not suitable for motor commutation requiring polarity reversal | Use only where unidirectional field detection suffices and latch memory is unnecessary |
Compared with AH3724 and US1881, AH175-PG-A-A offers superior thermal stability and bipolar latching essential for motor timing, but lacks the low-voltage flexibility of AH3724 and the simplicity of US1881's unipolar response.
Availability
AH175-PG-A-A is available at Aetrix Electronics and suitable for industrial motor control, automotive HVAC actuators, and high-temperature encoder modules requiring stable component supply despite its NRND status.
Supply support for AH175-PG-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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The AH175 belongs to Diodes' Hall-effect sensor product line, engineered specifically for demanding motor commutation and position-sensing applications in extreme thermal environments.
FAQ
Is AH175-PG-A-A pin-compatible with AH3724?
No - AH175-PG-A-A uses SIP-3 packaging with 1–2–3 pinout (Vcc–GND–OUT), while AH3724 is SC59-only with 1–2–3 pinout (Vcc–OUT–GND). Physical layout and pin assignment differ; board redesign is required for substitution.
What does "NRND" mean for AH175-PG-A-A?
"NRND" (Not Recommended for New Designs) indicates Diodes has superseded AH175 with AH3724 for future projects. However, AH175-PG-A-A remains fully manufactured and supported for existing production, with no announced obsolescence date or last-time-buy constraints.
Can AH175-PG-A-A operate at 24 V supply?
No - absolute maximum VCC is 20 V. Exceeding this risks permanent damage. For 24 V systems, use an external 20 V clamp or step-down regulator; the internal band-gap regulator does not support overvoltage tolerance.
Does AH175-PG-A-A require an external pull-up resistor on OUT?
Yes - the open-collector output requires an external pull-up resistor to define the logic-high voltage level. Typical values range from 2.2 kΩ (for 12 V systems with fast rise time) to 10 kΩ (for low-power 3.3 V interfaces); value depends on load capacitance and switching speed requirements.
AH175-PG-A-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP, Formed Leads
- Packaging:
- Tape & Box (TB)
- Product Status:
- Active
- 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-PG-A-A FAQ
1.How can I place an order for AH175-PG-A-A through Aetrix?
Please submit a Request for Quotation (RFQ) for AH175-PG-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-PG-A-A reliable?
The price and inventory of AH175-PG-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-PG-A-A is usually 5 days.
3.What payment methods are accepted for AH175-PG-A-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH175-PG-A-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH175-PG-A-A?
AH175-PG-A-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH175-PG-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-PG-A-A?
For technical support, including AH175-PG-A-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH175-PG-A-A requirements.
6.How does Aetrix verify that AH175-PG-A-A is sourced from the original manufacturer or authorized distributors?
All AH175-PG-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-PG-A-A meets industry standards.
7.What is the process for return or replacement of AH175-PG-A-A?
All AH175-PG-A-A units undergo pre-shipment inspection (PSI). If there is an issue with AH175-PG-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-PG-A-A part is unused and in its original packaging.
Return procedure for AH175-PG-A-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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