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Melexis Technologies NV MLX90297LLW-ABF-108-SP
- Part No.:
- MLX90297LLW-ABF-108-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297LLW-ABF-108-SP.pdf
- Description:
- 1-COIL PWM 3.3 18V 800MA CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:1,653
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Product details
Overview
MLX90297LLW-ABF-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%), current limiting (800 mA), soft start, soft switching, and reverse polarity protection via external diode. 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 air purifier fans.
For engineers reviewing the MLX90297LLW-ABF-108-SP datasheet, pinout, applications, or equivalent options, key selection factors include its DFN10 3×3×1 mm automotive package, FG/RD output configuration, AEC-Q100 qualification, ESD-HBM rating of 9 kV, and resistor-programmable speed curve and minimum speed.
Technical Context
The MLX90297LLW-ABF-108-SP implements AGC-based commutation control for stable rotation across varying magnetic field strengths, enabling consistent low-noise operation without rotor position feedback calibration. Its PWM input accepts duty-cycle commands while external resistors (Rvref, Rminsp, R1) configure reference voltage, minimum speed, and speed curve slope.
Internal OTP and CLP circuitry provide overtemperature and current-limit protection. The RD (rotor detection) output signals rotor presence and stall condition, distinguishing it from FG-only variants. Supply range (3.3–18 V) supports 12 V automotive systems with cold-crank tolerance down to 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - enables direct connection to automotive battery rails including cold-crank conditions |
| Motor Power | 7 W - supports mid-power cooling fans in LED headlights and compact appliances |
| Current Limit | 800 mA - protects motor windings and internal FETs during stall or overload |
| ESD-HBM | 9 kV - exceeds AEC-Q100-002 requirement for robustness in automotive assembly environments |
| Speed Curve Options | 10%, 20%, or 30% - selectable via R1 to match acoustic and thermal requirements of target fan |
| Output Type | RD (Rotor Detection) - provides real-time rotor presence/stall status for system diagnostics |
| Package | DFN10 3×3×1 mm - surface-mount, thermally enhanced automotive package with exposed pad |
Pinout & Package
MLX90297LLW-ABF-108-SP is housed in a 10-pin DFN package (3 mm × 3 mm × 1 mm) with exposed thermal pad (EP). Pin numbering follows standard DFN convention: top-left corner = Pin 1, counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; decoupled with Cdecoupling near pin |
| GND | Ground reference | Common return path for power, logic, and motor drive circuits |
| PWM | Speed command input | Accepts 0–100% duty-cycle PWM signal to set target fan speed |
| FG/RD | Function-selectable output | Configured as RD (rotor detection) in this variant; pulses on rotor movement, held low on stall |
| OUT1 / OUT2 | H-bridge motor outputs | Drive single-coil BLDC fan; complementary switching controlled by internal commutation logic |
| VREF | Reference voltage output | Provides 1.25 V reference for external Rvref to set VREF-based thresholds |
| MINSP | Minimum speed setting | Resistor (Rminsp) between MINSP and GND sets lowest allowed speed |
| LRP | Low-rotation pulse output | Indicates slow rotation; used for low-speed monitoring in safety-critical systems |
| OTP | Overtemperature flag | Open-drain output pulled low when die temperature exceeds threshold |
| EP | Exposed thermal pad | Must be soldered to PCB copper pour for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified (Grade 0) | Validated for automotive underhood applications up to +150 °C ambient |
| AGC-based Hall commutation | Eliminates need for magnet strength calibration; maintains stable timing across aging and temperature |
| Resistor-configurable speed curve | Enables fine-tuning of acoustic profile without firmware changes or re-spinning PCB |
| Integrated soft start & soft switching | Reduces inrush current and EMI during startup and commutation transitions |
| RD output with stall detection | Supports functional safety monitoring in ASIL-B relevant cooling subsystems |
Applications
| LED Headlight Cooling | Air Purifier Fan Control |
|---|---|
Use Scenario: Thermal management of high-brightness LED modules in automotive headlamps where space and acoustic noise are tightly constrained. IC Role / Device Role / Timing Role: Single-coil BLDC fan driver with RD output for real-time rotor health monitoring and stall detection. Use Value: Enables silent, reliable cooling at low speeds (<1,000 RPM) while meeting ASIL-B diagnostic coverage requirements via RD and OTP flags. | Use Scenario: Continuous-duty fan in residential air purifiers requiring ultra-low audible noise and long-term reliability. IC Role / Device Role / Timing Role: All-in-one motor controller with programmable speed curve to match filter resistance and airflow decay over time. Use Value: Reduces BOM count by eliminating discrete Hall latching, gate drivers, and current sense components-enabling half-size PCB layouts. |
| Fridge Evaporator Fan | Industrial Enclosure Cooling |
Use Scenario: Low-power evaporator fan in energy-efficient refrigerators operating across -25 °C to +70 °C ambient. IC Role / Device Role / Timing Role: Automotive-qualified fan driver delivering 7 W output with built-in reverse polarity protection (external diode required). Use Value: Ensures startup and stable operation at 3.3 V cold-crank voltage, supporting wide-input-range white goods designs. | Use Scenario: Forced-air cooling for industrial PLCs and power converters in factory environments with vibration and ESD exposure. IC Role / Device Role / Timing Role: Robust motor driver with 9 kV HBM ESD rating and OTP/CLP fault reporting via open-drain pins. Use Value: Eliminates field failures due to electrostatic discharge during handling and reduces thermal derating needs via exposed thermal pad. |
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 |
|---|---|---|---|
| MLX90297LLW-AAF-108 | FG (tachometer) output instead of RD; same 800 mA current limit and DFN10 package | Lacks rotor stall detection; suitable for non-safety-critical speed feedback only | Select when tachometer feedback suffices and RD diagnostics are unnecessary |
| MLX90297KLW-AAF-109 | Higher 960 mA current limit; same RD output but industrial-grade (not AEC-Q100) | Not qualified for automotive use; intended for white goods and industrial enclosures | Choose for higher-power fans in non-automotive settings where AEC-Q100 is not mandated |
Compared with MLX90297LLW-AAF-108 and MLX90297KLW-AAF-109, the MLX90297LLW-ABF-108-SP uniquely combines AEC-Q100 Grade 0 qualification, RD-based stall detection, and 800 mA current limiting in a thermally optimized DFN10 package-making it the only option certified for safety-aware automotive lighting cooling.
Availability
MLX90297LLW-ABF-108-SP is available at Aetrix Electronics and suitable for LED headlight cooling, air purifier fan control, and fridge evaporator fan applications requiring stable component supply, automotive qualification, and long-lifecycle support.
Supply support for MLX90297LLW-ABF-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 intelligent sensors and driver ICs for automotive, industrial, and consumer applications, with core expertise in magnetic sensing and motor control.
The MLX90297 product line delivers all-in-one single-coil BLDC fan drivers targeting low-noise, high-reliability cooling in automotive lighting, home appliances, and industrial systems-designed to replace multi-chip solutions with minimal external components.
FAQ
What is the function of the RD output on the MLX90297LLW-ABF-108-SP?
The RD (Rotor Detection) output on the MLX90297LLW-ABF-108-SP pulses synchronously with rotor movement and holds low during stall or no-rotation conditions. This enables real-time motor health monitoring without additional sensors. In MLX90297LLW-ABF-108-SP, RD is fixed per ordering code-unlike FG variants-and supports diagnostic functions in ASIL-B–relevant systems such as automotive LED headlight cooling.
Does the MLX90297LLW-ABF-108-SP require external current-sense resistors?
No, the MLX90297LLW-ABF-108-SP integrates current limiting with a fixed 800 mA threshold and does not require external current-sense resistors. Overcurrent protection triggers automatically during stall or overload, disabling outputs until reset via VDD cycle or PWM disable. This simplifies layout and improves reliability compared to discrete implementations requiring sense resistors and comparators.
How is the speed curve configured on the MLX90297LLW-ABF-108-SP?
The speed curve (10%, 20%, or 30%) on the MLX90297LLW-ABF-108-SP is set by resistor R1 connected between VREF and MINSP. Its value selects one of three predefined linear relationships between PWM duty cycle and actual fan speed. This resistor-based configuration eliminates firmware dependency and allows hardware-level tuning of acoustic performance for specific fan models-critical in MLX90297LLW-ABF-108-SP deployments like air purifiers and LED headlights.
Is the MLX90297LLW-ABF-108-SP pin-compatible with other MLX90297 variants in DFN10 package?
Yes, all MLX90297 variants in the LW (DFN10) package-including MLX90297LLW-ABF-108-SP, MLX90297LLW-AAF-108, and MLX90297KLW-AAF-109-share identical pinout, footprint, and thermal pad layout. However, FG vs. RD functionality and current limit values differ per order code, so PCB design must align with the selected variant's output type and protection level before finalizing MLX90297LLW-ABF-108-SP integration.
What is the purpose of the LRP pin on the MLX90297LLW-ABF-108-SP?
The LRP (Low Rotation Pulse) pin on the MLX90297LLW-ABF-108-SP outputs a pulse train at reduced frequency during low-speed operation, indicating that the fan is rotating below nominal speed but not stalled. This provides granular speed feedback for closed-loop control or diagnostic logging. In MLX90297LLW-ABF-108-SP, LRP supports functional safety monitoring in cooling systems where partial-speed operation must be distinguished from complete failure.
MLX90297LLW-ABF-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-ABF-108-SP FAQ
1.How can I place an order for MLX90297LLW-ABF-108-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297LLW-ABF-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-ABF-108-SP reliable?
The price and inventory of MLX90297LLW-ABF-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-ABF-108-SP is usually 5 days.
3.What payment methods are accepted for MLX90297LLW-ABF-108-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297LLW-ABF-108-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297LLW-ABF-108-SP?
MLX90297LLW-ABF-108-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297LLW-ABF-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-ABF-108-SP?
For technical support, including MLX90297LLW-ABF-108-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297LLW-ABF-108-SP requirements.
6.How does Aetrix verify that MLX90297LLW-ABF-108-SP is sourced from the original manufacturer or authorized distributors?
All MLX90297LLW-ABF-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-ABF-108-SP meets industry standards.
7.What is the process for return or replacement of MLX90297LLW-ABF-108-SP?
All MLX90297LLW-ABF-108-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297LLW-ABF-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-ABF-108-SP part is unused and in its original packaging.
Return procedure for MLX90297LLW-ABF-108-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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