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Diodes Incorporated AH3717Q-P-B
- Part No.:
- AH3717Q-P-B
- Manufacturer:
- Diodes Incorporated
- Category:
- Switches (Solid State)
- Package:
- -
- Datasheet:
-
AH3717Q-P-B.pdf
- Description:
- HALL LATCH SWITCH SIP-3 BULK 1K
- Quantity:
- Payment:
- Shipping:
Inventory:1,000
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Product details
Overview
AH3717Q-P-B from Diodes Incorporated is an AEC-Q100 Grade 0 qualified automotive Hall-effect latch IC designed for high-voltage brushless DC motor commutation and angular position sensing. It operates from 3.0V to 27V, features ±140G typical operate/release points (BOP/BRP), 280G typical hysteresis, open-drain output with 60mA current limit, and supports -40°C to +150°C ambient operation in SIP-3 (Bulk Pack) package.
For engineers reviewing the AH3717Q-P-B datasheet, AH3717Q-P-B pinout, AH3717Q-P-B application, or AH3717Q-P-B equivalent, key selection criteria include magnetic sensitivity grade (highest in AH3717Q series), load-dump immunity (40V), chopper-stabilized temperature stability, and SIP-3 mechanical compatibility for high-reliability automotive sensor mounting.
Technical Context
The AH3717Q employs chopper-stabilized architecture with dynamic offset cancellation to minimize switch-point drift over temperature and stress, delivering ±140G BOP/BRP with 280G hysteresis at full -40°C to +150°C range. Its internal bandgap regulator supplies temperature-compensated bias to analog blocks, enabling stable operation across 3.0–27V supply.
It integrates reverse-blocking diode and Zener clamp on VDD, plus output Zener clamp and overcurrent limiting (30–60mA), supporting robust deployment in 12V/24V automotive systems exposed to load dump (40V transient) and reverse battery (-18V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.0V to 27V - Enables direct connection to automotive battery rails without external regulation. |
| BOP / BRP (Typical) | ±140G - Highest sensitivity grade in AH371xQ family; enables detection of weak magnetic fields in compact encoder designs. |
| Hysteresis (Typical) | 280G - Reduces chatter in noisy magnetic environments; ensures clean latching behavior during slow or oscillating field transitions. |
| Output Type | Open-drain with 60mA sink capability - Allows flexible pull-up to any logic rail up to 40V; supports direct interface to microcontroller GPIO or external driver stages. |
| Startup Time | 13µs typical - Ensures rapid system readiness after power-on; critical for real-time RPM measurement in engine control units. |
| Operating Temperature | -40°C to +150°C - Qualified for under-hood placement in powertrain and chassis modules per AEC-Q100 Grade 0. |
| Load Dump Protection | 40V transient rating - Withstands ISO 7637-2 Pulse 5a without external protection components. |
Pinout & Package
SIP-3 (Bulk Pack) package: straight-lead, through-hole mount, optimized for high-vibration automotive sensor assemblies and manual or wave-soldered production.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | VDD | Power supply input; accepts 3.0–27V with integrated 40V transient clamping and reverse-blocking diode. |
| 2 | GND | Ground reference for internal circuitry and output stage; must be low-impedance path to vehicle chassis ground. |
| 3 | OUTPUT | Open-drain output; sinks up to 60mA; requires external pull-up resistor; clamped to 36V max with internal Zener. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces thermal drift of BOP/BRP to <±0.5G/°C, ensuring consistent switching thresholds across full automotive temperature range. |
| 40V load dump tolerance | Eliminates need for external TVS diode in ISO 7637-2 compliant designs, reducing BOM count and PCB area. |
| High magnetic sensitivity (±140G) | Enables use with smaller, lower-cost magnets or increased air gaps in BLDC rotor position sensing applications. |
| AEC-Q100 Grade 0 qualification | Validated for 150°C junction operation and PPAP-ready; meets IATF 16949 manufacturing requirements. |
| ESD robustness (HBM 8kV, CDM 1kV) | Supports handling and assembly in standard automotive electronics production lines without special ESD controls. |
Applications
| BLDC Motor Commutation | RPM Measurement |
|---|---|
|
Use Scenario: Detecting rotor pole position in 12V/24V automotive cooling fans or EPS motors. IC Role / Device Role / Timing Role: Bipolar latch providing digital commutation signals synchronized to magnet rotation; latched output eliminates need for external debouncing. Use Value: Enables precise 6-step commutation with minimal latency (13µs startup, <1µs output fall time), improving motor efficiency and torque ripple. |
Use Scenario: Measuring crankshaft or camshaft rotational speed in engine management systems. IC Role / Device Role / Timing Role: Magnetic zero-crossing detector generating pulse train proportional to shaft speed; open-drain output interfaces directly to MCU timer capture inputs. Use Value: Stable ±140G threshold ensures reliable pulse generation even with magnet aging or temperature-induced field weakening. |
| Flow Meter Sensing | Linear Position Indexing |
|
Use Scenario: Monitoring fuel or coolant flow via rotating impeller with embedded magnets. IC Role / Device Role / Timing Role: Latching Hall sensor detecting each magnet passage; output toggles per revolution for volumetric flow calculation. Use Value: 280G hysteresis prevents false counts from vibration-induced magnetic noise in harsh under-hood environments. |
Use Scenario: Detecting discrete positions of gearshift actuators or throttle plates using multi-pole linear magnets. IC Role / Device Role / Timing Role: High-sensitivity latch identifying absolute position states via sequential South/North pole transitions along magnet track. Use Value: Highest BOP/BRP in family allows reliable detection at larger air gaps (up to 3.5mm with N42 magnet), simplifying mechanical design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL3717QSA-7 | Same magnetic specs (±140G BOP/BRP), but in SOT23-3 (Type S) package with reversed magnetic polarity orientation (South pole to marking side). | Suitable for surface-mount PCBs with space constraints; requires layout revision due to opposite pole activation geometry. | Select when board real estate is limited and reflow soldering is preferred over through-hole mounting. |
| TLE4961-3U | Lower sensitivity (±80G BOP), wider supply range (2.7–27V), integrated reverse-polarity protection, but no 40V load dump rating. | Better suited for low-voltage body electronics; lacks required transient immunity for powertrain-level deployment. | Choose only for non-critical 12V subsystems where cost is prioritized over under-hood ruggedness. |
Compared with AL3717QSA-7 and TLE4961-3U, AH3717Q-P-B delivers superior load dump resilience and mechanical robustness for through-hole automotive sensors, while its SIP-3 footprint supports higher vibration tolerance and easier manual inspection than SOT23 variants.
Availability
AH3717Q-P-B is available at Aetrix Electronics and suitable for brushless DC motor commutation, RPM measurement, and linear position indexing requiring stable component supply in automotive production programs.
Supply support for AH3717Q-P-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 semiconductor company specializing in discrete, analog, and mixed-signal solutions for automotive, industrial, and computing markets.
AH3717Q belongs to the AH371xQ automotive Hall-effect latch product line, engineered specifically for high-reliability rotor position and speed sensing in demanding under-hood environments.
FAQ
What magnetic polarity activates the AH3717Q-P-B output in SIP-3 package?
For SIP-3 (Bulk Pack) and SOT23 (Type S) packages, a South pole applied to the part-marking side switches the output ON (low). This polarity orientation is confirmed in the DS46067 datasheet Figure 1 and Magnetic Characteristics table. SC59 uses opposite polarity, but AH3717Q-P-B uses SIP-3, so South-to-marking-side activation applies.
Does AH3717Q-P-B require an external capacitor on VDD?
Yes - a 10nF to 100nF ceramic capacitor (CIN) is required between VDD and GND per the Typical Applications Circuit in DS46067. This stabilizes the internal bandgap regulator and enhances RF noise immunity; omission risks erratic switching or startup failure, especially in electrically noisy automotive environments.
Can AH3717Q-P-B operate reliably at 27V continuous supply?
Yes - 27V is within the Recommended Operating Conditions (3.0V to 27V). The 40V Absolute Maximum Rating is for transient load dump only; sustained operation at 27V is fully characterized and supported across -40°C to +150°C, with supply current remaining ≤4.8mA and VOUT_ON ≤0.42V at 20mA load.
Is AH3717Q-P-B pin-compatible with other AH371xQ variants?
Yes - all AH371xQ devices share identical SIP-3, SOT23 (Type S), and SC59 footprints and pinouts (VDD-GND-OUTPUT). However, magnetic sensitivity (BOP/BRP) differs across the series (AH3713Q to AH3717Q), so direct substitution requires validation of field strength in the target application to avoid missed or false triggers.
AH3717Q-P-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- -
AH3717Q-P-B FAQ
1.How can I place an order for AH3717Q-P-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AH3717Q-P-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 AH3717Q-P-B reliable?
The price and inventory of AH3717Q-P-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AH3717Q-P-B is usually 5 days.
3.What payment methods are accepted for AH3717Q-P-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AH3717Q-P-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AH3717Q-P-B?
AH3717Q-P-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AH3717Q-P-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 AH3717Q-P-B?
For technical support, including AH3717Q-P-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AH3717Q-P-B requirements.
6.How does Aetrix verify that AH3717Q-P-B is sourced from the original manufacturer or authorized distributors?
All AH3717Q-P-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 AH3717Q-P-B meets industry standards.
7.What is the process for return or replacement of AH3717Q-P-B?
All AH3717Q-P-B units undergo pre-shipment inspection (PSI). If there is an issue with AH3717Q-P-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 AH3717Q-P-B part is unused and in its original packaging.
Return procedure for AH3717Q-P-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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