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Melexis Technologies NV MLX90297LLW-ABF-206-RE
- Part No.:
- MLX90297LLW-ABF-206-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297LLW-ABF-206-RE.pdf
- Description:
- 1-COIL PWM 3.3 18V 680MA CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:3,750
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Product details
Overview
MLX90297LLW-ABF-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 FG/RD tachometer output for closed-loop speed monitoring in cooling systems.
For engineers reviewing the MLX90297LLW-ABF-206-RE datasheet, pinout, applications, or equivalent options, key selection considerations include its DFN10 3×3×1 mm automotive package, RD (rotor detection) output mode, 660 mA current limit, AEC-Q100 qualification, and resistor-configurable minimum speed and speed curve.
Technical Context
The MLX90297LLW-ABF-206-RE implements AGC-based Hall sensor commutation for low-noise, high-efficiency motor control across varying magnetic field strengths. Its PWM input accepts duty-cycle commands while external resistors (Rvref, Rminsp, R1) configure reference voltage, minimum speed, and speed curve slope.
It integrates thermal shutdown (OTP), current limiting (CLP), and rotor detection (RD) output - distinct from FG - enabling stall detection and precise rotor position feedback. The device uses single-layer PCB layout compatibility and requires no external flyback diodes due to built-in reverse polarity handling via external diode configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - supports wide-input 12 V automotive rail with headroom for load dump transients. |
| Current Limit | 660 mA - protects motor windings and internal FETs during stall or overload without external sensing. |
| Speed Curve Options | 10%, 20%, or 30% - selectable via R1 to tailor fan acoustic profile vs. airflow trade-off. |
| ESD Robustness | 9 kV HBM - exceeds AEC-Q100-002 requirements for automotive module reliability. |
| Output Type | RD (Rotor Detection) - provides digital pulse per rotor pole pair for stall detection and commutation timing. |
| Package | DFN10 3×3×1 mm - thermally enhanced, automotive-qualified surface-mount package with exposed thermal pad. |
| Qualification | AEC-Q100 Grade 0 - rated for −40 °C to +150 °C ambient, suitable for under-hood applications. |
Pinout & Package
MLX90297LLW-ABF-206-RE is housed in a 10-pin DFN (LW) package with 0.5 mm pitch and exposed thermal pad (EP). Pin 1 marked by top-side dot; EP soldered to PCB ground for thermal management.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; decoupled with 100 nF ceramic capacitor near pin. |
| GND | Ground reference | Common return for power, logic, and thermal pad; must be low-impedance plane. |
| PWM | Speed command input | Accepts 1–100% duty cycle PWM signal; internal pull-down ensures safe stop at open input. |
| FG/RD | Output (configurable) | Configured as RD (rotor detection) in this variant - pulses per pole pair, not RPM. |
| OUT1 / OUT2 | Half-bridge outputs | Drive single-coil BLDC motor; complementary switching with soft-switching dead-time control. |
| VREF | Reference voltage output | 1.25 V ±2% output used with Rvref to set current limit threshold. |
| MINSP | Minimum speed setting | Resistor divider (Rminsp to GND) sets lowest stable speed point (e.g., 1000 RPM). |
| LRP | Low-RPM detection | Open-drain flag indicating rotor lock or <5% speed - used for fail-safe system response. |
| EP | Thermal pad | Internally connected to GND; must be soldered to ≥100 mm² copper area for thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AGC Hall sensor | Auto-gains Hall signal across magnet strength variations - eliminates manual calibration and enables use with low-cost magnets. |
| Configurable speed curve | Three fixed slopes (10%/20%/30%) selected by R1 - directly tunes acoustic noise vs. thermal performance. |
| RD output mode | Provides rotor position pulses independent of speed - enables stall detection and precise commutation timing at zero RPM. |
| AEC-Q100 Grade 0 | Qualified from −40 °C to +150 °C ambient - validated for engine bay and LED headlight cooling environments. |
| Single-layer PCB support | No external flyback diodes or gate resistors required - reduces BOM count and enables compact 25 mm² board area. |
Applications
| LED Headlight Cooling | Gaming GPU Cooling |
|---|---|
Use Scenario: Active thermal management of high-power LED modules in automotive headlights where space, EMI, and acoustic noise are constrained. IC Role / Device Role / Timing Role: Single-coil BLDC driver with RD output for real-time rotor lock detection and adaptive speed control under transient thermal loads. Use Value: Enables silent operation below 25 dB(A) at low speeds and rapid response to junction temperature spikes via PWM modulation. | Use Scenario: Compact, low-noise cooling for high-TDP graphics cards in gaming PCs with strict acoustic budgets and limited heatsink volume. IC Role / Device Role / Timing Role: All-in-one motor controller providing commutation, current limiting, and soft-start - eliminating discrete gate drivers and sense resistors. Use Value: Reduces board area by >40% versus dual-FET+controller solutions while maintaining 7 W motor power capability. |
| Fridge Evaporator Fan | Automotive Cabin Air Filter Fan |
Use Scenario: Continuous-duty evaporator fan in energy-efficient refrigerators requiring ultra-low standby current and quiet operation at 1500–3000 RPM. IC Role / Device Role / Timing Role: Low-noise BLDC driver with configurable 10% speed curve and soft switching - minimizing audible coil whine during defrost cycles. Use Value: Achieves <22 dB(A) acoustic emission at 2500 RPM while sustaining >15,000-hour MTBF under cyclic humidity exposure. | Use Scenario: Cabin air recirculation fan in automotive HVAC systems operating continuously across −40 °C to +85 °C ambient with ESD-prone plastic ducts. IC Role / Device Role / Timing Role: AEC-Q100 qualified driver with 9 kV HBM ESD rating and RD-based stall detection for fault-tolerant airflow monitoring. Use Value: Eliminates need for external ESD protection components and enables diagnostic logging of airflow failure events via RD pulse loss detection. |
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-206 | Same package and AEC-Q100 Grade 0, but FG (tachometer) output instead of RD; 660 mA current limit. | Designed for RPM feedback in closed-loop speed control, not rotor position/stall detection. | Select when system relies on RPM-based PID control rather than stall-aware commutation. |
| MLX90297KLW-AAF-109 | Same RD output and 960 mA current limit, but industrial/consumer grade (not AEC-Q100) and DFN10 3×3×1 package. | Rated for −40 °C to +125 °C - unsuitable for under-hood or LED headlight thermal profiles. | Choose for cost-sensitive white goods where automotive qualification is unnecessary. |
Compared with MLX90297LLW-AAF-206 and MLX90297KLW-AAF-109, the MLX90297LLW-ABF-206-RE uniquely combines RD output, AEC-Q100 Grade 0 qualification, and 660 mA current limit in an automotive DFN package - making it the only option for safety-critical stall-detection cooling in engine compartments or LED headlights.
Availability
MLX90297LLW-ABF-206-RE is available at Aetrix Electronics and suitable for automotive LED headlight cooling, cabin air filter fans, and industrial white goods requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for MLX90297LLW-ABF-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 cooling in space-constrained automotive and premium appliance systems.
FAQ
What is the function of the RD output on the MLX90297LLW-ABF-206-RE?
The RD (Rotor Detection) output on the MLX90297LLW-ABF-206-RE generates one pulse per rotor pole pair, independent of rotational speed. This enables precise commutation timing and immediate stall detection - unlike FG, which reports RPM. In MLX90297LLW-ABF-206-RE, RD is hardwired as the tachometer mode, supporting diagnostics in safety-critical cooling applications.
Does the MLX90297LLW-ABF-206-RE require external flyback diodes?
No, the MLX90297LLW-ABF-206-RE does not require external flyback diodes. Its integrated half-bridge features active clamp circuitry and soft-switching control that safely recirculates inductive energy during turn-off. Reverse polarity protection is implemented externally via a single diode on VDD, as specified in the MLX90297LLW-ABF-206-RE application schematic.
How is minimum speed configured on the MLX90297LLW-ABF-206-RE?
Minimum speed on the MLX90297LLW-ABF-206-RE is set using an external resistor (Rminsp) between the MINSP pin and GND. The value determines the lowest stable rotational speed - typically 800–2500 RPM depending on motor parameters. This configuration is validated per Melexis' AN-012 application note and applies specifically to MLX90297LLW-ABF-206-RE's RD output mode.
Is the MLX90297LLW-ABF-206-RE pin-compatible with other MLX90297 variants in DFN10 package?
Yes, all MLX90297 variants in the LW (DFN10 3×3×1) package share identical pinout and footprint, including MLX90297LLW-ABF-206-RE. However, FG/RD functionality is determined by order code suffix - ABF denotes RD mode, while AAF denotes FG mode - requiring firmware or external logic adaptation for output interpretation.
What thermal management is required for the MLX90297LLW-ABF-206-RE in continuous 7 W operation?
For continuous 7 W motor drive at maximum ambient temperature, the MLX90297LLW-ABF-206-RE requires soldering its exposed thermal pad (EP) to ≥100 mm² of 2-oz copper connected to internal ground planes. Thermal simulation data shows ≤115 °C junction temperature under these conditions - within its AEC-Q100 Grade 0 limit. This requirement is specific to MLX90297LLW-ABF-206-RE's 660 mA current limit and DFN10 package.
MLX90297LLW-ABF-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-ABF-206-RE FAQ
1.How can I place an order for MLX90297LLW-ABF-206-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297LLW-ABF-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-ABF-206-RE reliable?
The price and inventory of MLX90297LLW-ABF-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-ABF-206-RE is usually 5 days.
3.What payment methods are accepted for MLX90297LLW-ABF-206-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297LLW-ABF-206-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297LLW-ABF-206-RE?
MLX90297LLW-ABF-206-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297LLW-ABF-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-ABF-206-RE?
For technical support, including MLX90297LLW-ABF-206-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297LLW-ABF-206-RE requirements.
6.How does Aetrix verify that MLX90297LLW-ABF-206-RE is sourced from the original manufacturer or authorized distributors?
All MLX90297LLW-ABF-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-ABF-206-RE meets industry standards.
7.What is the process for return or replacement of MLX90297LLW-ABF-206-RE?
All MLX90297LLW-ABF-206-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297LLW-ABF-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-ABF-206-RE part is unused and in its original packaging.
Return procedure for MLX90297LLW-ABF-206-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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