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Diodes Incorporated AH175-PG-B-B
- Part No.:
- AH175-PG-B-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- 3-SIP
- Datasheet:
-
AH175-PG-B-B.pdf
- Description:
- MAGNETIC SWITCH LATCH 3SIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AH175-PG-B-B from Diodes Incorporated is a bipolar Hall-effect latch sensor designed for high-temperature rotor position and RPM sensing in brushless DC motor control. It operates from 3.5V to 20V, delivers 25mA sink current, features built-in reverse-polarity protection, and functions across –40°C to +150°C. Its open-collector pre-driver output switches low when magnetic flux exceeds Bop (15–60 Gauss) and holds state until reversal falls below Brp (–60 to –15 Gauss).
For engineers reviewing the AH175-PG-B-B datasheet, AH175-PG-B-B pinout, AH175-PG-B-B application, or AH175-PG-B-B equivalent, key selection criteria include magnetic hysteresis (30–120 Gauss), junction temperature rating (+150°C), SIP-3 bulk-pack package footprint, and compatibility with three-phase Hall motor commutation logic.
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 that enables stable operation across its 3.5–20V supply range. Its bipolar latching behavior requires magnetic polarity reversal to toggle output state, eliminating need for external timing components.
It supports automotive-grade thermal reliability via AEC-Q100-aligned design (though not formally qualified), with power dissipation derated from 550mW at 25°C to 0mW at 150°C in SIP-3 bulk-pack configuration. Magnetic thresholds are specified per grade (A/B), with typical Bhy = 80 Gauss for noise immunity in noisy motor environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.5V to 20V DC - supports direct connection to 12V automotive rails without external regulation |
| Output Type | Open-collector pre-driver - interfaces directly with NPN/PNP driver stages or logic-level inputs |
| Sink Current | 25mA max - drives standard optocouplers or small-signal transistors without buffering |
| Operating Temp | –40°C to +150°C - enables placement near motor windings or under-hood locations |
| Magnetic Hysteresis | 30–120 Gauss - suppresses chatter during slow or noisy magnetic transitions |
| Power Dissipation | 550mW @ 25°C (SIP-3 Bulk Pack) - defines maximum continuous load at ambient before thermal shutdown |
| Reverse Polarity Protection | Built-in - prevents damage if Vcc and GND are swapped during assembly or field service |
Pinout & Package
The AH175-PG-B-B is supplied in SIP-3 (Bulk Pack) - a 3-pin single-inline package with straight leads, optimized for through-hole mounting in high-reliability motor control assemblies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Vcc | Positive supply input | Accepts 3.5–20V; powers internal regulator, Hall element, and comparator |
| 2 - GND | Ground reference | Common return path for supply and output stage; must be low-impedance for noise immunity |
| 3 - OUT | Open-collector output | Sinks up to 25mA when active; requires external pull-up to define logic-high level |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar latching operation | Requires South-to-brand-side magnetic field to turn on, and polarity reversal to turn off - eliminates need for external reset signals |
| Integrated band-gap regulator | Stabilizes internal bias over supply and temperature - ensures consistent switching thresholds from 3.5V to 20V |
| High-temperature capability | Junction rated to +150°C - allows direct mounting on motor housings or near heat sources without derating |
| Lead-free & green construction | Meets RoHS 3 and halogen/antimony-free requirements (<900ppm Br/Cl, <1000ppm Sb) - compliant for global automotive shipments |
Applications
| Brushless DC Motor Commutation | Rotor Position Sensing |
|---|---|
Use Scenario: Detecting rotor magnet polarity in 3-phase BLDC motors to sequence gate drive signals. IC Role / Device Role / Timing Role: Digital Hall latch providing synchronized edge-triggered phase feedback to motor controller IC. Use Value: Enables precise 120° electrical commutation with 80-Gauss hysteresis preventing false triggering during vibration or EMI. | Use Scenario: Monitoring angular position of rotating shafts in industrial pumps and fans. IC Role / Device Role / Timing Role: Bipolar magnetic switch generating deterministic ON/OFF pulses per pole pair rotation. Use Value: Delivers repeatable position detection across –40°C to +150°C without calibration drift or external compensation. |
| Current Switch Interface | RPM Detection in Automotive Systems |
Use Scenario: Converting magnetic field changes from current-carrying conductors into digital enable/disable signals. IC Role / Device Role / Timing Role: High-voltage-tolerant Hall latch interfacing with isolated current sense paths. Use Value: Operates reliably from 3.5V to 20V supply - compatible with both 5V logic and 12V battery-fed systems. | Use Scenario: Measuring rotational speed of crankshafts or camshafts in engine management units. IC Role / Device Role / Timing Role: Temperature-stable magnetic threshold detector feeding tachometer input of ECU. Use Value: Maintains ±15 Gauss Bop tolerance over full automotive temperature range - ensures accurate RPM calculation at cold start and hot idle. |
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 Bop/Brp symmetry (±30 Gauss), lower ICC (2.5mA typ), SC59/SIP-3 options | Optimized for low-power, space-constrained designs; same thermal rating but improved magnetic consistency | Select AH3724 for new designs requiring tighter hysteresis control and reduced quiescent current |
| US1881 | Unipolar operation, 2.7–24V supply, 50mA sink, TO-92/SOT23 packages | Lacks bipolar latching - requires alternating North/South fields for toggling; better for simple proximity detection | Choose US1881 only where unipolar response suffices and higher sink current is needed |
Compared with AH175-PG-B-B, AH3724 offers superior magnetic repeatability and lower power consumption for next-gen motor control, while US1881 trades latching behavior for broader voltage range and higher drive strength - making it suitable only for non-latching use cases.
Availability
AH175-PG-B-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, rotor position sensing, current switch interfaces, and RPM detection requiring stable component supply in harsh thermal environments.
Supply support for AH175-PG-B-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.
The AH175 belongs to Diodes' Hall-effect sensor product line, engineered specifically for robust magnetic position feedback in automotive and industrial motor control systems operating at extreme temperatures.
FAQ
What is the magnetic polarity requirement for AH175-PG-B-B activation?
The AH175-PG-B-B activates when a South pole approaches the branded side of the package (Bop = 15–60 Gauss). It remains latched until a reversed (North) field drops below Brp (–60 to –15 Gauss). This bipolar latching behavior is intrinsic to its internal comparator hysteresis and does not require external circuitry.
Can AH175-PG-B-B be used with a 5V microcontroller I/O pin?
Yes - its open-collector output can interface directly with 5V logic by adding a pull-up resistor (e.g., 10kΩ) from OUT to 5V. The device's 25mA sink capability safely drives standard GPIO inputs, and its 3.5–20V supply range allows independent Vcc biasing separate from the MCU rail.
Is AH175-PG-B-B qualified to AEC-Q100?
No - AH175-PG-B-B is not AEC-Q100 qualified. While it meets the thermal and electrical specifications required for automotive under-hood use (–40°C to +150°C, reverse-polarity protection), formal qualification requires additional stress testing and documentation. Diodes recommends AH3724 for AEC-Q100-compliant designs.
Why is AH175 marked "Not Recommended for New Designs"?
Diodes has designated AH175 as NRND due to the introduction of the AH3724, which improves magnetic threshold symmetry, reduces quiescent current, and extends long-term reliability. AH175-PG-B-B remains fully supported for existing production and legacy repair, but AH3724 is the preferred replacement for new schematics.
AH175-PG-B-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 3-SIP
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Latch
- Technology:
- Hall Effect
- Polarization:
- South Pole
- Sensing Range:
- 8mT Trip, -8mT 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-B-B FAQ
1.How can I place an order for AH175-PG-B-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH175-PG-B-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-PG-B-B reliable?
The price and inventory of AH175-PG-B-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-PG-B-B is usually 5 days.
3.What payment methods are accepted for AH175-PG-B-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH175-PG-B-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH175-PG-B-B?
AH175-PG-B-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH175-PG-B-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-PG-B-B?
For technical support, including AH175-PG-B-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH175-PG-B-B requirements.
6.How does Aetrix verify that AH175-PG-B-B is sourced from the original manufacturer or authorized distributors?
All AH175-PG-B-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-PG-B-B meets industry standards.
7.What is the process for return or replacement of AH175-PG-B-B?
All AH175-PG-B-B units undergo pre-shipment inspection (PSI). If there is an issue with AH175-PG-B-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-PG-B-B part is unused and in its original packaging.
Return procedure for AH175-PG-B-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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