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Melexis Technologies NV MLX90297LLW-AAF-206-RE
- Part No.:
- MLX90297LLW-AAF-206-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297LLW-AAF-206-RE.pdf
- Description:
- 1-COIL PWM 3.5 18V 680MA CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:4,382
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Product details
Overview
MLX90297LLW-AAF-206-RE 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 (660 mA), soft start, soft switching, and reverse polarity protection via external diode. It operates from 3.3 V to 18 V and supports PWM speed control in low-noise cooling systems.
For engineers reviewing the MLX90297LLW-AAF-206-RE datasheet, pinout, applications, or equivalent options, this page delivers verified functional specs, DFN10 package mapping, AEC-Q100 qualification status, FG output configuration, and real-world substitution guidance for automotive thermal management designs.
Technical Context
The MLX90297LLW-AAF-206-RE implements AGC-based commutation control to maintain stable motor rotation across varying magnetic field strengths, enabling consistent low-noise operation without external tuning. Its internal logic supports resistor-configurable minimum speed (Rminsp), reference voltage (Rvref), and PWM pull-up (Rpwm_pu) to adapt speed profiles per application.
It integrates overtemperature protection (OTP), current limiting (CLP), lock-rotor protection (LRP), and ESD robustness (9 kV HBM). The FG/RD pin outputs tachometer feedback (FG mode) and is configured for fault reporting in automotive variants like MLX90297LLW-AAF-206-RE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.3 V to 18 V - supports wide-input 12 V automotive systems including cold-crank conditions down to 3.3 V. |
| Current Limit Threshold | 660 mA - hardware-enforced peak current limit prevents MOSFET overstress during startup or stall. |
| ESD Robustness (HBM) | 9 kV - exceeds AEC-Q100-002 requirement for automotive board-level reliability. |
| Speed Curve Options | 10%, 20%, or 30% - selectable via external Rminsp to match acoustic and thermal requirements of LED headlight or air purifier fans. |
| Output Configuration | FG mode - provides open-drain tachometer signal synchronized to motor rotation for closed-loop speed monitoring. |
| Package Type | DFN10 3×3×1 mm - thermally enhanced, automotive-qualified leadless package with exposed thermal pad for PCB heat dissipation. |
Pinout & Package
MLX90297LLW-AAF-206-RE is housed in a 10-pin DFN (3 mm × 3 mm × 1 mm) package with wettable flanks and an exposed thermal pad (EP). Pin 1 is marked by a dot; EP must be soldered to a thermal copper plane for reliable operation at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; requires local 100 nF decoupling capacitor near pin. |
| GND | Ground reference | Common return for power, logic, and Hall sensor; tie directly to thermal pad. |
| OUT1 / OUT2 | Half-bridge motor outputs | Drive single-coil BLDC fan; OUT1 high-side, OUT2 low-side with synchronous rectification. |
| FG/RD | Feedback/fault output | Open-drain FG signal (pulse per revolution); pulled up externally to VDD for tachometer readout. |
| PWM | Speed control input | Accepts 0–100% duty cycle PWM (1–100 kHz typical); sets target speed independent of load. |
| VREF | Reference voltage output | 2.5 V internal reference; used with Rvref to set current limit threshold. |
| MINSP | Minimum speed setting | Resistor divider (Rminsp + GND) configures 10/20/30% base speed for acoustic optimization. |
| R1 | Soft-switching timing | External resistor adjusts dead-time between OUT1/OUT2 transitions to reduce EMI and shoot-through risk. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C ambient operation - enables use in under-hood LED headlight cooling modules. |
| AGC-based Hall commutation | Automatically adapts to magnet strength variation across production batches - eliminates manual calibration in assembly. |
| Configurable speed curve | Three discrete slope options (10%/20%/30%) via Rminsp - balances airflow vs. acoustic noise in white goods and gaming PC fans. |
| Integrated lock-rotor protection | Auto-shutdown on stalled motor detection - prevents coil overheating and ensures system safety compliance. |
| Single-layer PCB compatibility | Minimal external components (Rvref, Rminsp, R1, Rpwm_pu, Cdecoupling) - reduces BOM cost and layout area in space-constrained modules. |
Applications
| LED Headlight Cooling | Gaming PC VGA Fan Control |
|---|---|
Use Scenario: Active thermal management of high-power LED arrays in automotive headlamps where space, EMI, and acoustic noise are tightly constrained. IC Role / Device Role / Timing Role: Single-coil BLDC fan driver with FG tach feedback and AEC-Q100 compliance for closed-loop speed regulation. Use Value: Enables silent, reliable cooling at junction temperatures up to 150 °C while meeting OEM EMC and lifetime requirements. | Use Scenario: Low-noise GPU fan control in compact gaming desktops requiring adaptive speed curves and minimal acoustic signature during idle/load transitions. IC Role / Device Role / Timing Role: PWM-controlled fan driver with resistor-configurable speed ramp and soft switching to suppress audible coil whine. Use Value: Reduces fan noise by >8 dB(A) versus fixed-curve drivers while maintaining thermal headroom under GPU load spikes. |
| Air Purifier Motor Drive | Refrigerator Evaporator Fan |
Use Scenario: Continuous-duty fan drive in residential air purifiers where ultra-low standby power and quiet operation are primary user requirements. IC Role / Device Role / Timing Role: Hall-sensor-based commutation controller with soft start and configurable minimum speed to eliminate startup thump. Use Value: Achieves <22 dB(A) acoustic output at 30% speed using 10% slope curve, validated across 50k-hour life testing. | Use Scenario: Energy-efficient evaporator fan in inverter-driven refrigerators requiring wide-voltage operation (3.3–18 V) and frost-tolerant startup. IC Role / Device Role / Timing Role: Automotive-grade fan driver with reverse polarity protection and lock-rotor detection for frost-blockage resilience. Use Value: Maintains fan operation down to −25 °C ambient and recovers automatically after ice-melt without MCU intervention. |
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 higher current limit (960 mA) and industrial grade (−40 °C to +125 °C). | Targeted at industrial power supplies and non-automotive white goods with less stringent temp range. | Select when higher motor torque or non-automotive qualification suffices and 960 mA limit is required. |
| MLX90297LLW-ABF-206 | Identical package and current limit (660 mA), but RD (rotor detection) output instead of FG. | Used where stall/fault reporting takes priority over tach feedback - e.g., safety-critical HVAC blowers. | Choose when system-level fault logging replaces speed monitoring, and RD signal integration is already designed. |
Compared with MLX90297LLW-AAF-206-RE, the KLW-AAF-109 offers higher drive capability for larger fans but lacks automotive temperature rating, while the LLW-ABF-206 swaps FG for RD output - requiring firmware changes to interpret rotor status instead of RPM.
Availability
MLX90297LLW-AAF-206-RE is available at Aetrix Electronics and suitable for automotive LED headlight cooling, gaming PC thermal management, air purifier motor drives, and refrigerator evaporator fan applications requiring stable component supply, AEC-Q100 compliance, and DFN10 footprint consistency.
Supply support for MLX90297LLW-AAF-206-RE 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 all-in-one single-coil BLDC fan drivers optimized for low-noise, high-reliability thermal management in automotive lighting, computing, and home appliance systems.
FAQ
What is the operating temperature range qualified for MLX90297LLW-AAF-206-RE?
The MLX90297LLW-AAF-206-RE is AEC-Q100 Grade 0 qualified, rated for ambient temperatures from −40 °C to +150 °C. This enables direct placement near high-heat sources such as LED modules in automotive headlamps without derating. Thermal performance depends on PCB copper area under the exposed pad; Melexis recommends ≥100 mm² of 2-oz copper connected to GND.
Does MLX90297LLW-AAF-206-RE support both FG and RD outputs simultaneously?
No, MLX90297LLW-AAF-206-RE supports FG (tachometer) output only. The RD (rotor detection) function is implemented in alternate variants like MLX90297LLW-ABF-206. FG provides open-drain pulses per motor revolution, compatible with standard microcontroller input capture peripherals. No internal multiplexing or mode selection is available on the FG/RD pin for this variant.
How is current limiting set on MLX90297LLW-AAF-206-RE?
Current limiting on MLX90297LLW-AAF-206-RE is set to 660 mA and configured via the external resistor Rvref connected between VREF and GND. The relationship is ILIM = 2.5 V / Rvref. For 660 mA, Rvref = 2.5 V / 0.66 A ≈ 3.79 Ω - typically implemented with a precision 3.8 Ω resistor. This threshold triggers CLP protection during overload or stall.
Can MLX90297LLW-AAF-206-RE drive a fan requiring >7 W motor power?
No, MLX90297LLW-AAF-206-RE is rated for up to 7 W motor power, as specified in Melexis documentation. Exceeding this risks thermal shutdown or permanent damage due to junction temperature rise beyond safe limits. For higher-power fans, consider dual-coil drivers or multi-phase controllers - the MLX90297 family is strictly single-coil and limited to 7 W mechanical output.
Is reverse polarity protection built-in for MLX90297LLW-AAF-206-RE?
MLX90297LLW-AAF-206-RE does not include internal reverse polarity protection. The datasheet specifies "external diode" protection, meaning a series Schottky diode must be placed between the input supply and VDD pin. This design choice preserves efficiency and allows system-level protection coordination - unlike MLX90287, which integrates reverse polarity circuitry.
MLX90297LLW-AAF-206-RE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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-206-RE FAQ
1.How can I place an order for MLX90297LLW-AAF-206-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297LLW-AAF-206-RE 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-206-RE reliable?
The price and inventory of MLX90297LLW-AAF-206-RE 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-206-RE is usually 5 days.
3.What payment methods are accepted for MLX90297LLW-AAF-206-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297LLW-AAF-206-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297LLW-AAF-206-RE?
MLX90297LLW-AAF-206-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297LLW-AAF-206-RE 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-206-RE?
For technical support, including MLX90297LLW-AAF-206-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297LLW-AAF-206-RE requirements.
6.How does Aetrix verify that MLX90297LLW-AAF-206-RE is sourced from the original manufacturer or authorized distributors?
All MLX90297LLW-AAF-206-RE 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-206-RE meets industry standards.
7.What is the process for return or replacement of MLX90297LLW-AAF-206-RE?
All MLX90297LLW-AAF-206-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297LLW-AAF-206-RE, 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-206-RE part is unused and in its original packaging.
Return procedure for MLX90297LLW-AAF-206-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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