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Diodes Incorporated AH175-PL-A-B
- Part No.:
- AH175-PL-A-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
AH175-PL-A-B.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:6,767
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Product details
Overview
AH175-PL-A-B from Diodes Incorporated is a bipolar Hall-effect latch sensor designed for high-temperature rotor position and RPM sensing in brushless DC motors. It operates from 3.5V to 20V, delivers 25mA sink current, features open-collector output with built-in reverse-polarity protection, and supports ambient temperatures from –40°C to +150°C in SIP-3 (Ammo Pack) package.
For engineers reviewing the AH175-PL-A-B datasheet, AH175-PL-A-B pinout, AH175-PL-A-B application, or AH175-PL-A-B equivalent, this page provides verified magnetic thresholds (Bop: 15–60 G, Brp: –60 to –15 G), thermal derating curves, package-specific power dissipation limits, and validated automotive-grade alternatives for legacy motor control designs.
Technical Context
The AH175 integrates a Hall voltage generator, amplifier, comparator with hysteresis, 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: South pole activation pulls OUT low until North pole field drops below release point.
Designed for harsh environments, it sustains junction temperatures up to +150°C and includes integrated reverse-voltage protection. Magnetic sensitivity is specified at 12V and 25°C, with Bop/Brp hysteresis ranging 30–120 G depending on grade (A or B), and output saturation voltage ≤400 mV at 10 mA sink.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5 V to 20 V DC - enables direct connection to 12 V automotive rails without external regulation |
| Operating Temperature | –40°C to +150°C - qualified for under-hood BLDC motor control and industrial actuator feedback |
| Output Type | Open-collector pre-driver - interfaces directly with external pull-up resistors or logic-level MOSFET gates |
| Sink Current | 25 mA maximum - drives small-signal relays or optocouplers without buffer stages |
| Magnetic Hysteresis | 30–120 G - suppresses chatter in noisy mechanical environments like gear-driven encoders |
| Power Dissipation (SIP-3) | 550 mW at 25°C, derated linearly to 0 mW at 150°C - defines thermal layout requirements for continuous operation |
| Reverse Polarity Protection | Built-in - eliminates need for external series diode in battery-connected applications |
Pinout & Package
Package: SIP-3 (Ammo Pack), 3-pin single-inline package with gull-wing leads; standardized footprint compatible with automated placement and reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vcc | Positive supply input | Accepts 3.5–20 V DC; powers internal regulator, Hall element, and output stage |
| 2 - GND | Ground reference | Common return path for supply and output current; must be low-impedance for noise immunity |
| 3 - OUT | Open-collector digital output | Sinks up to 25 mA when active; requires external pull-up to define logic-high level |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latching operation | Requires magnetic polarity reversal to change state - ensures robust position detection in rotating systems with alternating poles |
| Wide supply voltage range | 3.5 V to 20 V - accommodates 5 V microcontroller logic, 12 V automotive batteries, and 24 V industrial supplies without external regulators |
| Integrated reverse-voltage protection | Withstands –20 V applied to Vcc - prevents damage during battery misconnection in field service or assembly |
| High-temperature capability | Junction-rated to +150°C - supports placement near motor windings or exhaust components without derating penalties beyond datasheet curves |
| RoHS-compliant & halogen-free | Meets EU RoHS 3 (2015/863/EU), <900 ppm Br/Cl, <1000 ppm Sb - satisfies automotive and industrial environmental compliance mandates |
Applications
| Brushless DC Motor Commutation | Automotive Throttle Position Sensing |
|---|---|
|
Use Scenario: Detecting rotor magnet polarity to sequence phase winding energization in 3-phase BLDC motors. IC Role / Device Role / Timing Role: Digital position feedback element providing synchronized edge-triggered signals to motor driver logic. Use Value: Enables precise 120° electrical commutation timing with 30–120 G hysteresis preventing false triggering from vibration-induced flux ripple. |
Use Scenario: Monitoring throttle plate angular position via embedded magnet in pedal linkage. IC Role / Device Role / Timing Role: Latched magnetic switch generating discrete ON/OFF transitions at calibrated mechanical detents. Use Value: Delivers fail-safe position indication over –40°C to +150°C ambient, meeting AEC-Q200 stress test requirements for non-safety-critical subsystems. |
| Industrial Encoder Feedback | Rotary Switch Replacement |
|
Use Scenario: Counting gear teeth or cam lobes in hydraulic valve actuators or conveyor speed monitors. IC Role / Device Role / Timing Role: Edge-detecting magnetic latch generating clean pulse trains for RPM calculation. Use Value: 25 mA sink current drives optocoupler inputs directly; open-collector output allows flexible logic-level translation to 3.3 V or 5 V controllers. |
Use Scenario: Replacing mechanical rotary switches in HVAC damper controls or industrial panel interfaces. IC Role / Device Role / Timing Role: Solid-state position selector using magnet-actuated latching to retain state without power. Use Value: Eliminates contact wear and bounce; built-in hysteresis ensures stable switching even with slow magnet approach speeds. |
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: ±25 G typ), lower ICC (2.5 mA), SC59/SIP-3 options, AEC-Q100 Grade 0 qualified | Validated for safety-critical automotive subsystems requiring PPAP documentation and IATF 16949 traceability | Select for new designs requiring extended qualification, lower power, or tighter magnetic tolerance |
| US1881 | Unipolar operation (Bop only), 20 mA sink, same SIP-3/SC59 packages, –40°C to +125°C rating | Used where magnetic field direction is fixed and polarity reversal is not available (e.g., proximity-only detection) | Choose only if unipolar response suffices and temperature range ≤+125°C is acceptable |
Compared with AH175-PL-A-B, AH3724 offers superior automotive qualification and lower quiescent current but requires redesign for its different magnetic threshold profile; US1881 simplifies sensing in unidirectional fields but sacrifices high-temperature capability and bipolar latching reliability.
Availability
AH175-PL-A-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, automotive throttle position sensing, and industrial encoder feedback requiring stable component supply despite end-of-life status.
Supply support for AH175-PL-A-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, specializing in high-reliability power management, signal integrity, and sensing solutions for automotive, industrial, and computing markets.
The AH175 belongs to Diodes' Hall-effect sensor product line, engineered specifically for ruggedized magnetic position feedback in high-temperature motor control and actuation systems where latch stability and reverse-polarity resilience are critical.
FAQ
Is AH175-PL-A-B still recommended for new designs?
No - Diodes explicitly marks AH175 as "Not Recommended for New Design" (NRND) in its ordering information. The AH3724 is the designated replacement, offering improved AEC-Q100 qualification, lower supply current, and tighter magnetic thresholds. AH175-PL-A-B remains supported for legacy production and repair, with full datasheet compliance and traceable sourcing through Aetrix.
What is the difference between SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack) for AH175?
SIP-3 (Ammo Pack) uses spread-leaded gull-wing configuration optimized for tape-and-reel automated placement; SIP-3 (Bulk Pack) uses straight leads intended for manual or bulk-feed insertion. Both share identical die, electrical specs, and thermal ratings, but differ in lead form and packaging quantity: Ammo Pack ships in 4000-unit boxes, Bulk Pack in 1000-unit units.
Can AH175-PL-A-B operate reliably at 150°C ambient?
Yes - the device is rated for –40°C to +150°C ambient operation, with junction temperature limited to +150°C. At 150°C ambient, power dissipation must be reduced to 0 mW per datasheet derating curves, meaning it functions only in zero-power or very low-duty-cycle applications. For sustained operation above 125°C, thermal design must ensure junction temperature remains within limit using PCB copper area and airflow.
Does AH175-PL-A-B require an external pull-up resistor on the OUT pin?
Yes - the open-collector output requires an external pull-up resistor to define the logic-high voltage level. Typical values range from 1 kΩ to 10 kΩ depending on rise time and bus loading requirements. Without it, the output remains floating when inactive, risking undefined logic states or EMI susceptibility in noisy environments.
AH175-PL-A-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Obsolete
- Function:
- -
- Technology:
- -
- Polarization:
- -
- Sensing Range:
- -
- Test Condition:
- -
- Voltage - Supply:
- -
- Current - Supply (Max):
- -
- Current - Output (Max):
- -
- Output Type:
- -
- Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
AH175-PL-A-B FAQ
1.How can I place an order for AH175-PL-A-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH175-PL-A-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 AH175-PL-A-B reliable?
The price and inventory of AH175-PL-A-B 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-B is usually 5 days.
3.What payment methods are accepted for AH175-PL-A-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH175-PL-A-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH175-PL-A-B?
AH175-PL-A-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH175-PL-A-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 AH175-PL-A-B?
For technical support, including AH175-PL-A-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH175-PL-A-B requirements.
6.How does Aetrix verify that AH175-PL-A-B is sourced from the original manufacturer or authorized distributors?
All AH175-PL-A-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 AH175-PL-A-B meets industry standards.
7.What is the process for return or replacement of AH175-PL-A-B?
All AH175-PL-A-B units undergo pre-shipment inspection (PSI). If there is an issue with AH175-PL-A-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 AH175-PL-A-B part is unused and in its original packaging.
Return procedure for AH175-PL-A-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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