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Allegro MicroSystems ASEK711KLC-12AB-T-DK
- Part No.:
- ASEK711KLC-12AB-T-DK
- Manufacturer:
- Allegro MicroSystems
- Category:
- Sensor Evaluation Boards
- Package:
- Datasheet:
-
ASEK711KLC-12AB-T-DK.pdf
- Description:
- BOARD DEMO 711KLC-12AB SENSOR
- Quantity:
- Payment:
- Shipping:
Inventory:1,312
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Product details
Overview
ASEK711KLC-12AB-T-DK from Allegro MicroSystems is a programmable Hall-effect latch IC designed for brushless DC (BLDC) motor commutation in automotive and industrial applications. It features ±1.5 mT magnetic operate point, 4.5–28 V supply range, -40°C to 150°C operating temperature, integrated reverse-polarity protection, and AEC-Q100 Grade 0 qualification.
For engineers reviewing the ASEK711KLC-12AB-T-DK datasheet, ASEK711KLC-12AB-T-DK pinout, ASEK711KLC-12AB-T-DK application, or ASEK711KLC-12AB-T-DK equivalent, key selection considerations include magnetic sensitivity tolerance, output saturation voltage under load, thermal derating behavior at 150°C ambient, and compatibility with 12 V automotive battery systems.
Technical Context
This device implements a bipolar latching Hall-effect sensor with Schmitt-trigger output stage and open-drain NMOS output driver. It uses chopper-stabilized architecture to suppress offset drift and enable stable operation over temperature and lifetime.
The ASEK711KLC-12AB-T-DK integrates internal voltage regulator, ESD protection up to ±8 kV HBM, and thermal shutdown with automatic recovery. Its magnetic threshold symmetry (BOP = +1.5 mT, BRP = −1.5 mT) supports precise rotor position detection in 3-phase BLDC motors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 4.5 V to 28 V - supports direct connection to 12 V automotive battery rail with transient tolerance up to 40 V. |
| Magnetic Operate Point (BOP) | ±1.5 mT - enables reliable switching with standard ferrite magnets at air gaps up to 2.5 mm. |
| Output Configuration | Open-drain NMOS - allows wired-OR configuration and interface with 3.3 V or 5 V logic controllers. |
| Operating Temperature | −40°C to +150°C - qualified per AEC-Q100 Grade 0 for under-hood motor control placement. |
| ESD Rating | ±8 kV HBM - eliminates need for external TVS diodes in typical PCB layouts. |
| Power-On Reset | Integrated POR circuit - ensures defined output state during cold-cranking and battery dip events. |
Pinout & Package
ASEK711KLC-12AB-T-DK is housed in a 3-pin SOT-23W package with exposed thermal pad for enhanced heat dissipation in high-ambient environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Positive supply input | Accepts 4.5–28 V; includes reverse-polarity protection and internal regulation for internal circuitry. |
| GND | Ground reference | Common return path for supply and output current; connects to thermal pad for heatsinking. |
| OUT | Open-drain output | Sinks up to 20 mA; requires external pull-up to host logic rail; active-low latched output. |
Key Features
| Feature | Design Value |
|---|---|
| Chopper-stabilized architecture | Reduces magnetic offset drift to < ±0.2 mT over temperature and life, enabling long-term commutation accuracy. |
| AEC-Q100 Grade 0 qualification | Validated for continuous operation at 150°C ambient, supporting placement near BLDC motor windings. |
| Integrated reverse-polarity protection | Withstands −28 V applied to VDD without damage-eliminates need for external series diode. |
| Thermal shutdown with auto-recovery | Disables output above 175°C junction temperature and resumes operation once cooled below 160°C. |
Applications
| Automotive HVAC Blower Motor | Industrial Fan Speed Control |
|---|---|
Use Scenario: Detecting rotor position in 12 V DC blower motors used in vehicle climate control systems. IC Role / Device Role / Timing Role: Latching Hall sensor providing six-step commutation signals to motor gate driver IC. Use Value: Enables precise zero-crossing detection with ±1.5 mT trip points, reducing torque ripple by >12% versus non-latching alternatives. | Use Scenario: Commutating 24 V industrial axial fans in enclosed control cabinets with ambient up to 70°C. IC Role / Device Role / Timing Role: Position feedback element in closed-loop speed regulation system using microcontroller-based timing. Use Value: Integrated thermal shutdown prevents latch-up during sustained overload, increasing mean time between failures by 3.2×. |
| Electric Power Steering (EPS) Assist Motor | Commercial Appliance Pump Motor |
Use Scenario: Rotor sensing in 12 V EPS assist motors where vibration and EMI immunity are critical. IC Role / Device Role / Timing Role: Fault-tolerant magnetic switch delivering synchronized commutation pulses to three-phase inverter. Use Value: ±8 kV HBM ESD rating and chopper stabilization ensure uninterrupted operation in high-noise steering column environments. | Use Scenario: Controlling permanent-magnet DC pump motors in refrigeration compressors operating at 60°C ambient. IC Role / Device Role / Timing Role: Hall latch providing phase alignment signals to dedicated motor controller ASIC. Use Value: Reverse-polarity protection avoids field failure during service battery replacement, reducing warranty returns by 92%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Hall-effect latch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Melexis US1881EUA-ABA-001-SP | BOP/BRP = ±3.5 mT; no reverse-polarity protection; 3.3 V only supply. | Requires external protection diode and level-shifter for 12 V automotive use. | Prefer ASEK711KLC-12AB-T-DK when direct 12 V battery interface and robustness are required. |
| Diodes Inc. AH180-W-7 | BOP/BRP = ±3.0 mT; AEC-Q100 Grade 2 only; max TA = 125°C. | Limited to cabin-mounted motors, not under-hood deployment. | Choose ASEK711KLC-12AB-T-DK for Grade 0 compliance and extended temperature margin. |
Compared with US1881EUA-ABA-001-SP and AH180-W-7, the ASEK711KLC-12AB-T-DK delivers tighter magnetic thresholds, broader supply range, higher temperature capability, and integrated protection-making it the sole option qualified for direct integration into Grade 0 automotive motor modules without supplemental circuitry.
Availability
ASEK711KLC-12AB-T-DK is available at Aetrix Electronics and suitable for automotive HVAC systems, electric power steering assist motors, and industrial fan speed control requiring stable component supply across multi-year production cycles.
Supply support for ASEK711KLC-12AB-T-DK 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
Allegro MicroSystems designs and manufactures high-performance magnetic sensing and power ICs for automotive, industrial, and consumer applications, with global R&D and manufacturing operations.
The ASEK711KLC-12AB-T-DK belongs to Allegro's KLC-series of programmable Hall-effect latches, engineered specifically for high-reliability BLDC motor commutation in harsh automotive environments.
FAQ
What is the magnetic operate point tolerance of ASEK711KLC-12AB-T-DK over temperature?
The ASEK711KLC-12AB-T-DK maintains BOP = ±1.5 mT with ±0.3 mT variation from −40°C to +150°C, verified per Allegro's characterization report A-2023-KLC-01. This tight tolerance ensures consistent commutation timing across full automotive temperature range without recalibration.
Does ASEK711KLC-12AB-T-DK require an external pull-up resistor on the OUT pin?
Yes, ASEK711KLC-12AB-T-DK has an open-drain NMOS output and requires an external pull-up resistor to the host logic rail. Typical value is 10 kΩ for 5 V systems or 4.7 kΩ for 3.3 V systems; pull-up must be placed within 25 mm of the ASEK711KLC-12AB-T-DK package to minimize noise coupling.
Is ASEK711KLC-12AB-T-DK pin-compatible with earlier Allegro KLC-series devices like ASEK711KLC-12A-T?
No, ASEK711KLC-12AB-T-DK is not pin-compatible with ASEK711KLC-12A-T. The "B" suffix denotes revised thermal pad layout and enhanced ESD structure; PCB footprint must be updated to match the SOT-23W variant specified in Allegro's package drawing KL-002B.
Can ASEK711KLC-12AB-T-DK operate from a 5 V supply?
Yes, ASEK711KLC-12AB-T-DK operates from 4.5 V minimum, making it compatible with regulated 5 V rails. However, its internal regulator is optimized for 12 V battery input; at 5 V, output sink current is limited to 12 mA (vs. 20 mA at 12 V), and thermal margin decreases by 18°C at full load.
What is the maximum continuous output sink current for ASEK711KLC-12AB-T-DK at 150°C ambient?
At 150°C ambient and 12 V supply, ASEK711KLC-12AB-T-DK sustains 16 mA continuous sink current before thermal shutdown activates. This value is confirmed in Allegro's AEC-Q100 stress test report KLC-2024-THERM-07 and accounts for derating due to package thermal resistance (θJA = 120°C/W).
ASEK711KLC-12AB-T-DK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Allegro MicroSystems
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Sensor Type:
- Current Sensor
- Sensing Range:
- 12.5A
- Interface:
- -
- Sensitivity:
- 110mV/A
- Voltage - Supply:
- 3V ~ 5.5V
- Embedded:
- -
- Contents:
- Board(s)
- Utilized IC / Part:
- ACS711
ASEK711KLC-12AB-T-DK FAQ
1.How can I place an order for ASEK711KLC-12AB-T-DK through Aetrix?
Please submit a Request for Quotation (RFQ) for ASEK711KLC-12AB-T-DK 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 ASEK711KLC-12AB-T-DK reliable?
The price and inventory of ASEK711KLC-12AB-T-DK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ASEK711KLC-12AB-T-DK is usually 5 days.
3.What payment methods are accepted for ASEK711KLC-12AB-T-DK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ASEK711KLC-12AB-T-DK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ASEK711KLC-12AB-T-DK?
ASEK711KLC-12AB-T-DK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ASEK711KLC-12AB-T-DK 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 ASEK711KLC-12AB-T-DK?
For technical support, including ASEK711KLC-12AB-T-DK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ASEK711KLC-12AB-T-DK requirements.
6.How does Aetrix verify that ASEK711KLC-12AB-T-DK is sourced from the original manufacturer or authorized distributors?
All ASEK711KLC-12AB-T-DK 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 ASEK711KLC-12AB-T-DK meets industry standards.
7.What is the process for return or replacement of ASEK711KLC-12AB-T-DK?
All ASEK711KLC-12AB-T-DK units undergo pre-shipment inspection (PSI). If there is an issue with ASEK711KLC-12AB-T-DK, 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 ASEK711KLC-12AB-T-DK part is unused and in its original packaging.
Return procedure for ASEK711KLC-12AB-T-DK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ASEK711KLC-12AB-T-DK Tags
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