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Melexis Technologies NV MLX90297KLW-AAF-109-RE
- Part No.:
- MLX90297KLW-AAF-109-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297KLW-AAF-109-RE.pdf
- Description:
- IC FAN DRVR 12V PWM 3-18V 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,840
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Product details
Overview
MLX90297KLW-AAF-109-RE from Melexis is a single-coil brushless DC fan driver IC with integrated Hall sensor, configurable speed curve (10%/20%/30%), current limiting (960 mA), soft start/soft switching, and 3.3–18 V supply range. It targets low-noise cooling in VGA cards, white goods, and automotive cabin fans.
For engineers reviewing the MLX90297KLW-AAF-109-RE datasheet, pinout, applications, or equivalent options, key selection factors include its DFN10 3×3×1 mm package, FG output for tachometer feedback, external resistor-based speed curve configuration, and AEC-Q100 qualified operation up to 125°C ambient.
Technical Context
The MLX90297KLW-AAF-109-RE implements AGC-controlled Hall sensing for robust commutation across varying magnetic field strengths, enabling stable motor control without magnet calibration. Its PWM input accepts 100 Hz–25 kHz signals to set target speed, while Rvref, Rminsp, and R1 configure reference voltage, minimum speed, and speed curve slope respectively.
It integrates reverse polarity protection via internal circuitry (no external diode required), thermal shutdown (OTP), current limit protection (CLP), and ESD robustness (9 kV HBM). The FG/RD pin supports either tachometer output (FG) or rotor lock detection (RD), selected at factory - this variant is FG-configured.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - supports wide-input 12 V systems including automotive battery transients |
| Current Limit | 960 mA - protects motor and IC during stall or overload without external sense resistor |
| Speed Curve Options | 10%, 20%, or 30% - selectable via R1 to match acoustic/noise requirements of specific fan types |
| ESD Robustness | 9 kV HBM - exceeds AEC-Q100-002 for reliable handling in manufacturing and end-use environments |
| Operating Temp | −40 °C to +125 °C - qualified per AEC-Q100 Grade 2 for under-hood and industrial cooling applications |
| Motor Power Drive | 7 W - enables driving higher-torque fans than MLX90287 (5 W), e.g., larger CPU or LED headlight fans |
| Output Configuration | SINGLE-COIL - drives one-phase BLDC fans with integrated back-EMF sensing and commutation logic |
Pinout & Package
MLX90297KLW-AAF-109-RE uses a thermally enhanced DFN10 (3 mm × 3 mm × 1 mm, 0.5 mm pitch) package with exposed thermal pad (EP) on underside for PCB heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; internal LDO powers internal logic and Hall sensor |
| GND | Ground reference | Common return for power, logic, and motor drive paths; ties to EP for thermal conduction |
| OUT1 / OUT2 | H-bridge motor outputs | Drive single-coil BLDC fan; complementary switching with soft-switching dead-time control |
| PWM | Speed command input | Accepts active-low PWM signal (100 Hz–25 kHz); duty cycle sets target fan speed |
| FG/RD | Feedback or fault output | Configured as FG (tachometer pulse per revolution) - used for closed-loop speed monitoring |
| VREF | Reference voltage output | Provides 1.25 V reference for external Rvref to set VREF-based speed scaling |
| MINSP | Minimum speed control | Resistor (Rminsp) sets lowest operational speed to prevent stall at low PWM duty |
| LRP | Lock-rotor protection | Internal comparator detects stalled rotor and disables outputs after timeout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 2 qualified | Validated for automotive cabin cooling and industrial embedded systems operating up to 125°C ambient |
| Configurable speed curve | Three discrete slopes (10%/20%/30%) set by single resistor R1 - enables noise-optimized tuning per fan model |
| Integrated current limiting | 960 mA threshold with automatic foldback - eliminates need for external current-sense amplifier or shunt |
| Soft start & soft switching | Gradual ramp-up of motor voltage and controlled gate transitions - reduces audible coil whine and EMI |
| Single-layer PCB compatible | Minimal external components (only 3 resistors + decoupling cap) - lowers BOM cost and layout complexity |
Applications
| Gaming GPU Cooling | Refrigerator Evaporator Fan |
|---|---|
Use Scenario: High-performance graphics cards require silent, responsive fan control during variable GPU load spikes. IC Role / Device Role / Timing Role: MLX90297KLW-AAF-109-RE acts as the full motor controller - sensing rotor position, commutating coils, regulating speed via PWM, and reporting RPM via FG. Use Value: Configurable 10% speed curve minimizes acoustic noise at low loads while maintaining 7 W drive capability for burst cooling. | Use Scenario: Refrigerator evaporator fans operate continuously in humid, temperature-cycled environments requiring long-term reliability. IC Role / Device Role / Timing Role: MLX90297KLW-AAF-109-RE serves as the intelligent fan driver - providing soft start to reduce mechanical stress, current limiting to survive ice buildup, and FG feedback for system diagnostics. Use Value: AEC-Q100 qualification and 9 kV HBM ESD ensure >10-year field life in condensation-prone compartments. |
| Automotive LED Headlight Cooling | Air Purifier Blower Control |
Use Scenario: LED headlights generate localized heat; compact axial fans must deliver stable airflow within tight thermal and space constraints. IC Role / Device Role / Timing Role: MLX90297KLW-AAF-109-RE functions as the space-optimized motor driver - using DFN10 package and integrated protections to replace discrete MOSFET+controller solutions. Use Value: 3×3 mm footprint and built-in reverse polarity protection eliminate board area for external diodes and enable direct integration into headlight module PCBs. | Use Scenario: Air purifiers demand ultra-quiet fan operation at low speeds while maintaining consistent airflow across filter clogging cycles. IC Role / Device Role / Timing Role: MLX90297KLW-AAF-109-RE operates as the precision speed regulator - using AGC Hall sensing to maintain stable commutation despite aging magnets and dust accumulation on rotors. Use Value: Adjustable minimum speed (via Rminsp) prevents fan stall when static pressure rises, ensuring continuous air circulation even with dirty filters. |
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 |
|---|---|---|---|
| MLX90297KZC-AAF-108 | SOIC8 package (5.1×6.1 mm), 800 mA current limit, same FG output and speed curve options | Better suited for through-hole or larger PCBs where thermal pad soldering is impractical | Select when manual assembly, rework, or legacy SOIC footprint compatibility is required |
| MLX90297LLW-AAF-108 | DFN10 package, AEC-Q100 Grade 0 (−40 °C to +150 °C), 800 mA current limit, automotive-grade screening | Required for under-hood applications exceeding 125°C ambient or needing extended temperature validation | Select when full automotive qualification (Grade 0) and higher junction temperature margin are mandatory |
Compared with MLX90297KZC-AAF-108, the MLX90297KLW-AAF-109-RE offers higher current drive (960 mA vs. 800 mA) and smaller footprint, while MLX90297LLW-AAF-108 trades current capacity for extended temperature rating - making the KLW variant optimal for space-constrained industrial and cabin-cooling designs needing extra drive headroom.
Availability
MLX90297KLW-AAF-109-RE is available at Aetrix Electronics and suitable for gaming GPU cooling, refrigerator evaporator fans, and automotive LED headlight cooling requiring stable component supply and AEC-Q100-compliant performance.
Supply support for MLX90297KLW-AAF-109-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 magnetic sensing, infrared thermometry, and driver ICs for automotive and industrial motion control.
The MLX90297 family delivers all-in-one single-coil BLDC fan drivers with AGC Hall sensing, targeting low-noise, high-reliability cooling in space- and thermal-constrained applications.
FAQ
What is the maximum motor power supported by MLX90297KLW-AAF-109-RE?
The MLX90297KLW-AAF-109-RE supports up to 7 W motor power, verified per Melexis specification tables and thermal derating curves. This enables driving larger axial fans compared to the 5 W MLX90287, with the 960 mA current limit and DFN10 thermal pad ensuring safe operation at full load in still-air conditions.
Does MLX90297KLW-AAF-109-RE require an external reverse polarity protection diode?
No, MLX90297KLW-AAF-109-RE includes built-in reverse polarity protection circuitry, eliminating the need for an external diode. This is confirmed in the Quick Reference table and schematic - unlike MLX90287 which requires external diode protection, the MLX90297KLW-AAF-109-RE integrates this function internally.
How is the speed curve configured on MLX90297KLW-AAF-109-RE?
The speed curve (10%, 20%, or 30%) on MLX90297KLW-AAF-109-RE is set by resistor R1 connected between MINSP and GND. Its value selects one of three fixed slopes - no programming or digital interface is needed. This analog configuration method is documented in the MLX90297 datasheet section "Speed Curve Selection".
Is MLX90297KLW-AAF-109-RE pin-compatible with other MLX90297 variants?
MLX90297KLW-AAF-109-RE shares identical pinout with all LW-package MLX90297 variants (e.g., MLX90297LLW-AAF-108), but differs from ZC-package versions (SOIC8). The DFN10 pin assignment - including VDD, GND, OUT1/OUT2, PWM, FG/RD, VREF, MINSP, and LRP - is consistent across LW variants per Melexis package drawings.
What does the "-RE" suffix indicate in MLX90297KLW-AAF-109-RE?
The "-RE" suffix in MLX90297KLW-AAF-109-RE denotes tape-and-reel packaging per Melexis ordering conventions - indicating the part is supplied in standard 3,000-unit reels compatible with automated SMT placement equipment. This matches the packaging format specified for all LW variants in the Ordering Information table.
MLX90297KLW-AAF-109-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:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- PWM
- Technology:
- CMOS
- 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)
MLX90297KLW-AAF-109-RE FAQ
1.How can I place an order for MLX90297KLW-AAF-109-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-RE reliable?
The price and inventory of MLX90297KLW-AAF-109-RE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90297KLW-AAF-109-RE is usually 5 days.
3.What payment methods are accepted for MLX90297KLW-AAF-109-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297KLW-AAF-109-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297KLW-AAF-109-RE?
MLX90297KLW-AAF-109-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-RE?
For technical support, including MLX90297KLW-AAF-109-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297KLW-AAF-109-RE requirements.
6.How does Aetrix verify that MLX90297KLW-AAF-109-RE is sourced from the original manufacturer or authorized distributors?
All MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-RE meets industry standards.
7.What is the process for return or replacement of MLX90297KLW-AAF-109-RE?
All MLX90297KLW-AAF-109-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-RE part is unused and in its original packaging.
Return procedure for MLX90297KLW-AAF-109-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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