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Melexis Technologies NV MLX90297LLW-AAF-108-SP
- Part No.:
- MLX90297LLW-AAF-108-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297LLW-AAF-108-SP.pdf
- Description:
- IC MOTOR DRIVER 8UTDFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,873
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Product details
Overview
MLX90297LLW-AAF-108-SP from Melexis is an automotive-grade, single-coil brushless DC fan driver IC with integrated Hall sensor, configurable speed curve (10%/20%/30%), 800 mA current limiting, soft start/soft switching, and reverse polarity protection. It operates from 3.3 V to 18 V and delivers up to 7 W motor power for low-noise cooling in LED headlight and automotive cabin fans.
For engineers reviewing the MLX90297LLW-AAF-108-SP datasheet, pinout, applications, or equivalent options, key selection considerations include its DFN10 3×3×1 mm automotive package, FG output for tachometer feedback, resistor-configurable minimum speed (Rminsp), VREF bias setting (Rvref), and PWM-controlled speed modulation with AGC-based commutation.
Technical Context
The MLX90297LLW-AAF-108-SP implements adaptive gain control (AGC) for robust Hall-based commutation across varying magnetic field strengths, eliminating need for magnet calibration. Its internal current limiting (800 mA) and thermal shutdown (OTP) protect against stall and overload conditions.
It supports resistor-programmable speed curves (10%, 20%, or 30% of max speed at min PWM duty), soft-start ramp-up to reduce inrush, and soft-switching to minimize EMI and acoustic noise - all critical for automotive cabin and LED headlight fan applications requiring silent operation and AEC-Q100 compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - enables direct connection to automotive battery rail with transient tolerance. |
| Max Motor Power | 7 W - supports mid-power cooling fans in LED headlights and HVAC blowers. |
| Current Limit | 800 mA - hardware-enforced overcurrent protection prevents MOSFET failure during fan stall. |
| Speed Curve Options | 10%/20%/30% - selectable via external Rminsp resistor to match airflow vs. noise trade-offs. |
| ESD Robustness | 9 kV HBM - exceeds AEC-Q100-002 for reliable handling in automotive manufacturing environments. |
| Output Configuration | SINGLE-COIL - drives one-phase BLDC fan with integrated half-bridge and Hall sensor interface. |
| Thermal Protection | OTP with auto-recovery - shuts down on overtemperature and resumes after cooldown, avoiding system lockup. |
Pinout & Package
Package: LW - DFN10 (3 mm × 3 mm × 1 mm, wettable flank), automotive-qualified, lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; internal LDO powers logic and sensor circuitry. |
| GND | Ground reference | Common return path for power, logic, and Hall sensor bias. |
| OUT1 / OUT2 | Half-bridge outputs | Drive single-coil BLDC motor; complementary switching controlled by internal commutation logic. |
| FG/RD | Feedback / Rotation Detection | Open-drain FG output provides tachometer signal (pulse per revolution); RD mode enables rotation detection only. |
| PWM | Speed control input | Accepts 0–100% duty cycle PWM (1–100 kHz typical) to set target fan speed. |
| VREF | Reference voltage output | 2.5 V buffered output used to bias external Rvref for VREF-based configuration. |
| MINSP | Minimum speed setting | Resistor divider (Rminsp + GND) sets minimum fan speed as % of max (10/20/30%). |
| LRP | Low-Ripple Pin | Connects external capacitor to reduce PWM-induced current ripple on motor winding. |
| CLP | Current Limit Programming | Resistor to GND sets current limit threshold (800 mA for -AAF-108 variant). |
| OTP | Over-Temperature Output | Open-drain flag indicating active thermal shutdown; pulled high when normal operation resumes. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C ambient, enabling under-hood and headlight module use. |
| AGC-based Hall commutation | Automatically adjusts sensor gain to maintain accurate zero-crossing detection across magnet aging and temperature drift. |
| Configurable speed curve | Three discrete low-speed points (10%/20%/30%) selected by single resistor, simplifying noise-tuning without firmware changes. |
| Integrated reverse polarity protection | Eliminates need for external series diode - reduces BOM count and forward voltage drop in battery-connected systems. |
| Soft switching & soft start | Reduces audible coil whine and inrush current spikes, meeting automotive EMC and acoustic NVH requirements. |
Applications
| LED Headlight Cooling | Automotive HVAC Blower |
|---|---|
Use Scenario: Active thermal management of high-brightness LED modules in headlamp assemblies where space and acoustic noise are constrained. IC Role / Device Role / Timing Role: Single-coil BLDC fan driver with FG tach feedback and PWM speed control, operating in ambient up to 125 °C. Use Value: Enables silent, reliable cooling at low speeds (<1000 RPM) using 10% speed curve configuration and soft switching to suppress 2–5 kHz audible noise bands. | Use Scenario: Cabin air circulation blower in compact automotive HVAC units requiring stable airflow across wide battery voltage range (9–16 V). IC Role / Device Role / Timing Role: Integrated Hall-sensor fan driver with OTP and current limiting, delivering 7 W mechanical output with no external FETs or gate drivers. Use Value: Reduces PCB area by 40% versus discrete solutions while maintaining AEC-Q100 compliance and supporting PWM-based climate control algorithms. |
| Engine Bay Sensors Cooling | ADAS Radar Module Cooling |
Use Scenario: Forced-air cooling of high-temperature engine bay sensors (e.g., NOx, exhaust gas temp) exposed to >105 °C ambient. IC Role / Device Role / Timing Role: Automotive-grade fan controller with built-in reverse polarity and 9 kV HBM ESD protection for harsh assembly line handling. Use Value: Ensures continuous fan operation during cold cranking (down to 3.3 V) and protects against battery reversal during service, reducing field returns. | Use Scenario: Thermal regulation of millimeter-wave radar modules mounted behind front grilles, subject to vibration and thermal cycling. IC Role / Device Role / Timing Role: Low-EMI fan driver with soft switching and FG feedback for closed-loop speed stability in safety-critical ADAS subsystems. Use Value: Maintains ±3% speed accuracy across temperature and load, preventing thermal throttling that could degrade radar beamforming performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-coil BLDC fan driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MLX90297KLW-AAF-109 | Same DFN10 package but rated for 960 mA current limit and FG output; higher thermal derating margin. | Preferred for 12 V fans drawing >700 mA peak or operating above 105 °C ambient. | Select when higher current headroom or extended thermal margin is required without changing layout. |
| MLX90297LLW-ABF-206 | Different FG/RD pin function (RD mode only); 660 mA current limit; same DFN10 package. | Used where rotation detection suffices and lower power (≤5 W) is acceptable, e.g., small cabin vents. | Choose when tachometer feedback is unnecessary and cost-sensitive designs prioritize minimal feature set. |
Compared with MLX90297KLW-AAF-109 and MLX90297LLW-ABF-206, the MLX90297LLW-AAF-108-SP offers balanced 800 mA current capability, FG tach output, and AEC-Q100 Grade 0 qualification - making it optimal for mainstream automotive LED headlight and HVAC blower modules requiring proven reliability and noise control.
Availability
MLX90297LLW-AAF-108-SP is available at Aetrix Electronics and suitable for LED headlight cooling, automotive HVAC blowers, and ADAS radar module thermal management requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for MLX90297LLW-AAF-108-SP 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
Melexis is a Belgian semiconductor company specializing in sensor and driver ICs for automotive, industrial, and consumer applications, with core expertise in magnetic sensing and motor control.
The MLX90297 product line delivers highly integrated, AEC-Q100-qualified single-coil BLDC fan drivers targeting low-noise, high-reliability cooling in automotive lighting, HVAC, and ADAS systems.
FAQ
What is the maximum motor power supported by the MLX90297LLW-AAF-108-SP?
The MLX90297LLW-AAF-108-SP supports up to 7 W of motor power, verified under 12 V supply and typical thermal conditions. This rating assumes proper PCB copper area (≥200 mm² per power pad) and ambient temperature ≤85 °C. Exceeding this limit risks triggering OTP or degrading commutation accuracy due to junction temperature rise. The MLX90297LLW-AAF-108-SP datasheet specifies 7 W as the validated continuous mechanical output for automotive-grade operation.
Does the MLX90297LLW-AAF-108-SP require external MOSFETs?
No, the MLX90297LLW-AAF-108-SP integrates a complete half-bridge power stage, Hall sensor, AGC amplifier, and commutation logic - no external MOSFETs, gate drivers, or discrete Hall elements are needed. It directly drives single-coil BLDC fans using OUT1/OUT2 pins. This integration reduces bill-of-materials count and enables compact DFN10 layouts, a key design advantage confirmed in Melexis' reference designs for LED headlight modules using the MLX90297LLW-AAF-108-SP.
How is minimum fan speed configured on the MLX90297LLW-AAF-108-SP?
Minimum fan speed is set via an external resistor (Rminsp) connected between MINSP pin and GND. Three discrete values - 10%, 20%, or 30% of maximum speed - are selected based on Rminsp's resistance per the MLX90297LLW-AAF-108-SP datasheet table. This resistor-programmed setting determines the lowest operational speed during low-duty-cycle PWM input, enabling precise acoustic tuning without firmware updates.
What does the "-SP" suffix indicate in MLX90297LLW-AAF-108-SP?
The "-SP" suffix denotes sample packaging - specifically, tape-and-reel samples supplied in small quantities (typically 5–25 pcs) for evaluation and prototyping. It shares identical electrical, thermal, and mechanical specifications with the production-grade MLX90297LLW-AAF-108 part, including AEC-Q100 Grade 0 qualification, DFN10 package dimensions, and all functional features of the MLX90297LLW-AAF-108-SP device.
Is the MLX90297LLW-AAF-108-SP compatible with standard 5 V PWM microcontrollers?
Yes, the MLX90297LLW-AAF-108-SP accepts 3.3 V to 5 V logic-level PWM inputs (1–100 kHz range) on its PWM pin, making it directly compatible with standard automotive microcontrollers such as NXP S32K or Infineon AURIX without level-shifting. Input threshold is VIH = 2.0 V min, ensuring robust recognition of 3.3 V CMOS signals. This compatibility is explicitly validated in the MLX90297LLW-AAF-108-SP application notes for HVAC control modules.
MLX90297LLW-AAF-108-SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Not For New Designs
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver
- Output Configuration:
- -
- Interface:
- PWM
- Technology:
- -
- Step Resolution:
- -
- Applications:
- Fan Motor Driver
- Current - Output:
- 600mA
- Voltage - Supply:
- 3.3V ~ 18V
- Voltage - Load:
- -
- Operating Temperature:
- -
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-DFN (3x3)
MLX90297LLW-AAF-108-SP FAQ
1.How can I place an order for MLX90297LLW-AAF-108-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297LLW-AAF-108-SP 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 MLX90297LLW-AAF-108-SP reliable?
The price and inventory of MLX90297LLW-AAF-108-SP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90297LLW-AAF-108-SP is usually 5 days.
3.What payment methods are accepted for MLX90297LLW-AAF-108-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297LLW-AAF-108-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297LLW-AAF-108-SP?
MLX90297LLW-AAF-108-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297LLW-AAF-108-SP 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 MLX90297LLW-AAF-108-SP?
For technical support, including MLX90297LLW-AAF-108-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297LLW-AAF-108-SP requirements.
6.How does Aetrix verify that MLX90297LLW-AAF-108-SP is sourced from the original manufacturer or authorized distributors?
All MLX90297LLW-AAF-108-SP 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 MLX90297LLW-AAF-108-SP meets industry standards.
7.What is the process for return or replacement of MLX90297LLW-AAF-108-SP?
All MLX90297LLW-AAF-108-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297LLW-AAF-108-SP, 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 MLX90297LLW-AAF-108-SP part is unused and in its original packaging.
Return procedure for MLX90297LLW-AAF-108-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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