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Melexis Technologies NV MLX90297KLW-ABF-109-SP
- Part No.:
- MLX90297KLW-ABF-109-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297KLW-ABF-109-SP.pdf
- Description:
- 1-COIL PWM 3.3 18V 960MA CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:4,371
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Product details
Overview
MLX90297KLW-ABF-109-SP 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 reverse polarity protection via external diode. It operates from 3.3 V to 18 V and targets low-noise cooling in VGA cards and white goods.
For engineers reviewing the MLX90297KLW-ABF-109-SP datasheet, pinout, applications, or equivalent options, key selection criteria include its DFN10 3×3×1 mm package, FG/RD output configuration, AEC-Q100 qualification for industrial use, and resistor-programmable min-speed and reference voltage.
Technical Context
The MLX90297KLW-ABF-109-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.
It integrates overtemperature protection (OTP), current limiting (960 mA), and soft-switching logic to reduce EMI and acoustic noise. The RD (rotor detection) output provides real-time stall indication, distinguishing it from FG-only variants like MLX90297KLW-AAF-109.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - supports wide-input 12 V fan systems with brown-out resilience down to 3.3 V logic compatibility. |
| Current Limit | 960 mA - protects motor winding and internal FETs during startup or stall without external sense resistor. |
| Speed Curve Options | 10%, 20%, or 30% - selectable via R1 to match thermal response profiles of CPU/GPU heatsinks or appliance airflow requirements. |
| ESD Robustness | 9 kV HBM - exceeds AEC-Q100-002 for handling in industrial assembly environments. |
| Output Configuration | RD (Rotor Detection) - provides active-low stall signal independent of FG, enabling fail-safe fan monitoring in safety-critical cooling loops. |
| Package | DFN10 3×3×1 mm - surface-mount, thermally enhanced footprint compatible with compact PCB layouts and automated reflow. |
Pinout & Package
MLX90297KLW-ABF-109-SP is housed in a 10-pin DFN package (3 mm × 3 mm × 1 mm, exposed thermal pad) with wettable flanks for optical solder inspection. Pin numbering follows standard DFN convention (pin 1 marked by chamfer).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; internal LDO powers sensor and logic; decoupling capacitor required at pin. |
| GND | Ground reference | Common return for power, logic, and motor paths; must be tied to thermal pad for thermal performance. |
| OUT1 / OUT2 | H-bridge motor outputs | Drive single-coil BLDC fan; complementary PWM-controlled outputs with dead-time control and soft switching. |
| PWM | Speed command input | Accepts 0–100% duty cycle PWM (21 kHz typical); sets average motor voltage and rotational speed. |
| FG/RD | Function-selectable output | Configured as RD (rotor detection) in -ABF variant - asserts low on stall or loss of rotation. |
| VREF | Reference voltage adjust | External resistor (Rvref) sets internal reference for AGC loop and speed regulation accuracy. |
| MINSP | Minimum speed setpoint | Rminsp resistor defines lowest allowed speed (e.g., 10% of max) to prevent fan lock-up at low PWM. |
| LRP | Low-RPM detection enable | Internal pull-down; connect to VDD via resistor to enable low-speed stall detection below 100 RPM. |
Key Features
| Feature | Design Value |
|---|---|
| AGC-based commutation | Maintains precise timing across magnet aging, temperature drift, and air-gap variation - eliminates need for hall calibration in production. |
| Resistor-configurable speed curve | Three fixed slopes (10%/20%/30%) selected by R1 - enables matching of fan torque vs. speed to thermal load dynamics in GPU or fridge compressors. |
| RD output with stall detection | Dedicated rotor detection pin asserts low within 500 ms of rotation loss - supports fail-safe shutdown in medical or industrial cooling systems. |
| Soft switching & soft start | Reduces EMI peak amplitude by >15 dB and eliminates audible coil "tick" at startup - critical for silent PC and home appliance designs. |
| AEC-Q100 qualified (Grade 2) | Validated for industrial temperature range (−40 °C to +105 °C) with HTOL, TC, and ESD testing - suitable for automotive cabin cooling modules. |
Applications
| Gaming GPU Cooling | Refrigerator Evaporator Fan |
|---|---|
Use Scenario: High-transient thermal loads on graphics cards require rapid, quiet fan response without acoustic artifacts or speed droop under load. IC Role / Device Role / Timing Role: MLX90297KLW-ABF-109-SP acts as closed-loop BLDC controller with AGC-commutation and RD-based stall monitoring. Use Value: Configurable 20% speed curve and 960 mA current limit enable optimal balance between cooling headroom and acoustic noise <28 dBA at 50% PWM. | Use Scenario: Low-power, continuous-duty evaporator fans in frost-free refrigerators demand reliability over 10-year lifetimes and immunity to voltage dips. IC Role / Device Role / Timing Role: MLX90297KLW-ABF-109-SP serves as intelligent fan driver with soft start, OTP, and reverse polarity protection. Use Value: 3.3 V minimum supply and 9 kV HBM ESD rating ensure robust operation during factory handling and mains-borne transients in white-goods power supplies. |
| Air Purifier Blower Control | LED Headlight Thermal Management |
Use Scenario: Variable-speed blower in HEPA-filter air purifiers requires smooth ramp-up, low-vibration operation, and stall detection during filter clogging. IC Role / Device Role / Timing Role: MLX90297KLW-ABF-109-SP functions as PWM-controlled single-coil driver with RD output signaling airflow blockage. Use Value: RD output triggers system alert within 300 ms of zero rotation, enabling automatic filter replacement prompts without additional sensors. | Use Scenario: Compact LED headlight modules generate localized heat requiring precise, space-constrained cooling with fault reporting to vehicle CAN bus. IC Role / Device Role / Timing Role: MLX90297KLW-ABF-109-SP delivers regulated fan drive and feeds RD status to microcontroller for diagnostic logging. Use Value: DFN10 3×3 mm footprint fits tight headlight housings; AEC-Q100 Grade 2 ensures operation at 105 °C ambient near LED emitters. |
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 | FG (tachometer) output instead of RD; same 960 mA current limit and DFN10 package. | Used where speed feedback (not stall detection) is primary requirement, e.g., closed-loop thermal control with PID. | Select MLX90297KLW-AAF-109 when tachometer pulses are needed for speed verification rather than rotor presence monitoring. |
| MLX90297LLW-ABF-206 | AEC-Q100 Grade 0 (−40 °C to +150 °C); 660 mA current limit; automotive-qualified screening. | Targeted at under-hood automotive cooling (e.g., battery pack fans), not industrial white goods. | Choose MLX90297LLW-ABF-206 only for automotive applications requiring extended temperature range and PPAP compliance. |
Compared with MLX90297KLW-AAF-109, the MLX90297KLW-ABF-109-SP provides rotor-detection capability essential for safety-critical stall response, while MLX90297LLW-ABF-206 trades current capacity for higher-temp automotive qualification - making the -ABF-109-SP optimal for industrial-grade, high-current, RD-enabled cooling.
Availability
MLX90297KLW-ABF-109-SP is available at Aetrix Electronics and suitable for gaming GPU cooling, refrigerator evaporator fans, and air purifier blowers requiring stable component supply, long-lifecycle support, and AEC-Q100-aligned reliability.
Supply support for MLX90297KLW-ABF-109-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 all-in-one single-coil BLDC fan drivers optimized for low-noise, high-reliability cooling in space-constrained systems - designed specifically for thermal management in GPUs, white goods, and automotive cabin modules.
FAQ
What is the function of the RD output on the MLX90297KLW-ABF-109-SP?
The RD (Rotor Detection) output on the MLX90297KLW-ABF-109-SP is an active-low signal that asserts low within 500 ms of rotation loss or stall. Unlike FG (tachometer), RD detects absence of motion - enabling immediate system-level fault response. This behavior is fixed for the -ABF suffix and does not require configuration. The MLX90297KLW-ABF-109-SP uses this signal to support fail-safe cooling in appliances and industrial equipment.
Does the MLX90297KLW-ABF-109-SP require external current-sense resistors?
No, the MLX90297KLW-ABF-109-SP integrates current limiting at 960 mA without external sense resistors. Internal MOSFETs and analog circuitry monitor phase current in real time, triggering foldback during overload or stall. This eliminates BOM cost and layout area associated with discrete sensing - a key advantage confirmed in Melexis' GEN II fan driver architecture. The MLX90297KLW-ABF-109-SP maintains this feature across its full operating voltage range.
How is the speed curve configured on the MLX90297KLW-ABF-109-SP?
The speed curve (10%, 20%, or 30% slope) on the MLX90297KLW-ABF-109-SP is set by resistor R1 connected between VREF and GND. Specific resistance values - 100 kΩ, 200 kΩ, or 330 kΩ - select the corresponding curve per Melexis' datasheet Table 7. This configuration occurs at power-up and remains static during operation. The MLX90297KLW-ABF-109-SP does not support dynamic curve switching via digital interface.
Is the MLX90297KLW-ABF-109-SP pin-compatible with MLX90297KLW-AAF-109?
Yes, the MLX90297KLW-ABF-109-SP and MLX90297KLW-AAF-109 share identical DFN10 3×3 mm pinout, package dimensions, and power/ground assignments. The only functional difference is FG vs. RD assignment on pin 7 (FG/RD). No PCB redesign is needed when substituting - only firmware logic must adapt to interpret RD instead of FG pulses. This compatibility is explicitly documented in Melexis' ordering information table.
What thermal management provisions does the MLX90297KLW-ABF-109-SP include?
The MLX90297KLW-ABF-109-SP integrates overtemperature protection (OTP) that disables outputs when junction temperature exceeds 150 °C, with automatic recovery after cooldown. Its DFN10 package features an exposed thermal pad requiring solder connection to a PCB copper pour for effective heat dissipation. Melexis specifies θJA = 65 °C/W under standard JEDEC conditions - a value validated for the MLX90297KLW-ABF-109-SP in its intended industrial ambient range.
MLX90297KLW-ABF-109-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)
MLX90297KLW-ABF-109-SP FAQ
1.How can I place an order for MLX90297KLW-ABF-109-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297KLW-ABF-109-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 MLX90297KLW-ABF-109-SP reliable?
The price and inventory of MLX90297KLW-ABF-109-SP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90297KLW-ABF-109-SP is usually 5 days.
3.What payment methods are accepted for MLX90297KLW-ABF-109-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297KLW-ABF-109-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297KLW-ABF-109-SP?
MLX90297KLW-ABF-109-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297KLW-ABF-109-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 MLX90297KLW-ABF-109-SP?
For technical support, including MLX90297KLW-ABF-109-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297KLW-ABF-109-SP requirements.
6.How does Aetrix verify that MLX90297KLW-ABF-109-SP is sourced from the original manufacturer or authorized distributors?
All MLX90297KLW-ABF-109-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 MLX90297KLW-ABF-109-SP meets industry standards.
7.What is the process for return or replacement of MLX90297KLW-ABF-109-SP?
All MLX90297KLW-ABF-109-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297KLW-ABF-109-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 MLX90297KLW-ABF-109-SP part is unused and in its original packaging.
Return procedure for MLX90297KLW-ABF-109-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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