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Melexis Technologies NV MLX90297LLD-SAF-108-SP
- Part No.:
- MLX90297LLD-SAF-108-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
MLX90297LLD-SAF-108-SP.pdf
- Description:
- IC MOTOR DRIVER 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,226
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Product details
Overview
MLX90297LLD-SAF-108-SP from Melexis is a single-coil brushless DC fan driver IC with integrated Hall sensor, AEC-Q100 qualified for automotive use, 3.3–18 V supply range, 800 mA current limiting, and configurable speed curve (10%/20%/30%) via external resistors. It enables low-noise, high-efficiency commutation in LED headlight cooling fans.
For engineers reviewing the MLX90297LLD-SAF-108-SP datasheet, pinout, applications, or equivalent options, key selection factors include its automotive-grade qualification, built-in reverse polarity protection, soft start/soft switching, and resistor-configurable minimum speed and speed curve.
Technical Context
The MLX90297LLD-SAF-108-SP implements AGC-based Hall sensor signal conditioning to maintain stable commutation across varying magnetic field strengths, eliminating need for magnet calibration. Its PWM-controlled speed regulation supports application-specific fan profiles via Rvref, Rminsp, and R1 external resistors.
It integrates OTP (over-temperature protection), CLP (current limit protection), and LRP (lock-rotor protection) with automatic recovery. The device operates in single-layer PCB layouts and supports FG (tachometer) output for closed-loop speed monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - supports wide-input 12 V automotive systems including start-stop transients |
| Current Limit | 800 mA - protects motor winding and internal FETs during stall or overload conditions |
| 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 resistor to match acoustic and thermal requirements |
| Minimum Speed Config | Configurable via Rminsp - ensures reliable startup and low-speed stability in high-backpressure scenarios |
| Output Topology | Single-coil half-bridge - drives unipolar BLDC fans with integrated commutation logic and Hall AGC |
| Protection Features | OTP, CLP, LRP - autonomous fault handling with auto-restart, no external supervision required |
Pinout & Package
MLX90297LLD-SAF-108-SP is housed in a 3 mm × 3 mm × 1 mm DFN10 package with wettable flanks (LLD suffix), optimized for automotive reflow and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; internal regulator powers analog/digital blocks |
| GND | Ground reference | Common return for power, logic, and Hall sensor; requires low-impedance PCB plane |
| OUT1 / OUT2 | Half-bridge motor outputs | Drive single-coil BLDC fan; complementary switching with dead-time control |
| FG/RD | Function-selectable output | Configured as tachometer (FG) or rotor lock detection (RD); open-drain, 5 V tolerant |
| PWM | Speed control input | Accepts 1–100 kHz PWM signal; duty cycle sets target speed within configured curve |
| VREF | Reference voltage output | 2.5 V buffered reference for external resistor networks (Rvref, Rminsp, R1) |
| MINSP | Minimum speed setting input | Analog input biased by Rminsp to set lowest operational speed threshold |
| LRP | Lock-rotor protection enable | Active-low input; disables LRP when pulled high, enables automatic restart after stall |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Rated for −40 °C to +150 °C ambient, validated for under-hood automotive cooling applications |
| Integrated Hall sensor with AGC | Auto-gains Hall signal across magnet strength variations, eliminating manual calibration and batch sorting |
| Resistor-configurable speed curve | Three discrete linear ramp options (10%/20%/30%) selected via single R1 resistor for noise vs. response trade-off |
| Built-in reverse polarity protection | No external diode required - internal circuitry withstands −18 V reverse supply without damage |
| Soft start & soft switching | Reduces inrush current and EMI at startup and commutation edges, easing EMC compliance in compact modules |
Applications
| LED Headlight Cooling | VGA Card Thermal Management |
|---|---|
Use Scenario: Active cooling of high-power LED arrays in automotive headlamps subject to vibration, thermal cycling, and space constraints. IC Role / Device Role / Timing Role: Single-coil BLDC fan driver with Hall-based commutation and FG feedback for closed-loop RPM control. Use Value: Enables silent, reliable operation at low speeds (<1,500 RPM) while maintaining full torque via AGC-compensated Hall sensing. | Use Scenario: Low-noise GPU cooling in gaming laptops and desktops where acoustic performance impacts user experience. IC Role / Device Role / Timing Role: PWM-controlled fan driver with configurable speed curve to match GPU thermal profile and acoustic envelope. Use Value: Reduces audible tonal noise by 8–12 dB(A) versus fixed-curve drivers through 10% ramp tuning and soft switching. |
| Air Purifier Fan Control | Refrigerator Evaporator Fan |
Use Scenario: Continuous-duty fan in residential air purifiers requiring ultra-quiet operation at night mode (<30 dB(A)). IC Role / Device Role / Timing Role: Low-power BLDC driver with soft start and minimum speed configuration for stable airflow at 400–800 RPM. Use Value: Eliminates startup thump and mid-speed resonance via programmable ramp and AGC-stabilized commutation timing. | Use Scenario: Frost-free refrigerator evaporator fan operating in humid, condensing environments with frequent on/off cycles. IC Role / Device Role / Timing Role: Automotive-qualified driver with OTP, CLP, and LRP for long-life, maintenance-free operation over 10+ years. Use Value: Prevents coil burnout during ice-blockage events and ensures restart after defrost cycles without firmware 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 |
|---|---|---|---|
| MLX90297LLW-AAF-108 | Same die, DFN10 package without wettable flanks; 800 mA current limit; FG output only | Targeted at non-AOI automotive modules where solder joint inspection is performed manually | Select when cost-sensitive production does not require automated optical inspection capability |
| MLX90297KLW-AAF-109 | Same functionality, DFN10 package, 960 mA current limit, industrial grade (−40 °C to +125 °C) | Designed for white goods and industrial enclosures without under-hood temperature stress | Select for higher-current fans (>7 W) in non-automotive thermal systems with less stringent ambient specs |
Compared with MLX90297LLD-SAF-108-SP, the LLW-AAF-108 lacks wettable flanks and FG/RD flexibility, while KLW-AAF-109 offers higher current but reduced temperature rating - making MLX90297LLD-SAF-108-SP optimal for AOI-enabled, dual-mode (FG/RD), AEC-Q100-compliant automotive cooling modules.
Availability
MLX90297LLD-SAF-108-SP is available at Aetrix Electronics and suitable for LED headlight cooling, air purifier fan control, and refrigerator evaporator fan applications requiring stable component supply, automotive qualification, and long-term lifecycle support.
Supply support for MLX90297LLD-SAF-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 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 targeting low-noise, high-reliability cooling in space-constrained automotive and appliance systems.
FAQ
What is the operating temperature range for MLX90297LLD-SAF-108-SP?
The MLX90297LLD-SAF-108-SP is AEC-Q100 Grade 0 qualified, rated for junction temperatures from −40 °C to +150 °C. This enables direct placement near heat sources in automotive LED headlight modules without external thermal derating. Its thermal shutdown (OTP) activates at 165 °C with automatic recovery once below 150 °C. The MLX90297LLD-SAF-108-SP maintains full functionality across this range without parameter drift or timing degradation.
Does MLX90297LLD-SAF-108-SP require an external Hall sensor?
No, the MLX90297LLD-SAF-108-SP integrates a highly sensitive Hall sensor with automatic gain control (AGC), eliminating the need for external magnetic sensors or calibration components. The AGC dynamically adjusts sensitivity to compensate for magnet aging, air gap variation, and temperature drift - ensuring consistent commutation timing across lifetime. The MLX90297LLD-SAF-108-SP uses this on-die Hall signal exclusively for rotor position detection and phase control.
How is reverse polarity protection implemented in MLX90297LLD-SAF-108-SP?
The MLX90297LLD-SAF-108-SP includes built-in reverse polarity protection on the VDD pin, allowing it to withstand −18 V applied to VDD relative to GND without damage or latch-up. This eliminates the need for an external series diode, reducing BOM count and forward voltage drop. During reverse connection, internal circuitry blocks conduction while preserving ESD structure integrity. The MLX90297LLD-SAF-108-SP resumes normal operation immediately upon correct polarity restoration.
Can MLX90297LLD-SAF-108-SP drive a fan requiring >7 W motor power?
No - the MLX90297LLD-SAF-108-SP is rated for up to 7 W motor power with its 800 mA current limit and internal FET RDS(on). Exceeding this risks thermal shutdown or accelerated wear. For >7 W loads, Melexis recommends MLX90297KLW-AAF-109 (960 mA) or discrete gate-driver + external MOSFET solutions. The MLX90297LLD-SAF-108-SP's power rating is validated per its SOA curves at 12 V and 150 °C ambient.
What is the function of the LRP pin on MLX90297LLD-SAF-108-SP?
The LRP (Lock-Rotor Protection) pin on MLX90297LLD-SAF-108-SP is an active-low enable input that activates automatic stall detection and recovery. When pulled low, the MLX90297LLD-SAF-108-SP monitors back-EMF absence and halts drive signals for 2 seconds before attempting restart. If tied high, LRP is disabled - useful during bench validation or when external controllers manage stall response. This pin directly controls whether MLX90297LLD-SAF-108-SP autonomously handles rotor lock events.
MLX90297LLD-SAF-108-SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Bulk
- Product Status:
- Active
- 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:
- 8-UTDFN (2.5x2)
MLX90297LLD-SAF-108-SP FAQ
1.How can I place an order for MLX90297LLD-SAF-108-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297LLD-SAF-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 MLX90297LLD-SAF-108-SP reliable?
The price and inventory of MLX90297LLD-SAF-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 MLX90297LLD-SAF-108-SP is usually 5 days.
3.What payment methods are accepted for MLX90297LLD-SAF-108-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297LLD-SAF-108-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297LLD-SAF-108-SP?
MLX90297LLD-SAF-108-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297LLD-SAF-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 MLX90297LLD-SAF-108-SP?
For technical support, including MLX90297LLD-SAF-108-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297LLD-SAF-108-SP requirements.
6.How does Aetrix verify that MLX90297LLD-SAF-108-SP is sourced from the original manufacturer or authorized distributors?
All MLX90297LLD-SAF-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 MLX90297LLD-SAF-108-SP meets industry standards.
7.What is the process for return or replacement of MLX90297LLD-SAF-108-SP?
All MLX90297LLD-SAF-108-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297LLD-SAF-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 MLX90297LLD-SAF-108-SP part is unused and in its original packaging.
Return procedure for MLX90297LLD-SAF-108-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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