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Melexis Technologies NV MLX90297LLW-AAF-108-RE
- Part No.:
- MLX90297LLW-AAF-108-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297LLW-AAF-108-RE.pdf
- Description:
- 1-COIL PWM 3.5 18V 800MA CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:4,455
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Product details
Overview
MLX90297LLW-AAF-108-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 (800 mA), soft start/soft switching, and reverse polarity protection. It operates from 3.3 V to 18 V and delivers up to 7 W motor power for low-noise cooling in LED headlight and automotive cabin fans.
For engineers reviewing the MLX90297LLW-AAF-108-RE datasheet, pinout, applications, or equivalent options, key selection factors include its AEC-Q100 qualified DFN10 3×3×1 mm package, FG output for tachometer feedback, resistor-configurable minimum speed (Rminsp) and reference voltage (Rvref), and built-in reverse polarity protection eliminating external diode requirements.
Technical Context
The MLX90297LLW-AAF-108-RE implements AGC-based commutation control for stable, low-noise rotation across varying magnetic field strengths. Its PWM input accepts 0–100% duty cycle signals to regulate fan speed while internal circuitry dynamically adjusts timing based on Hall sensor feedback and configurable R1/Rminsp/Rvref resistors.
It integrates OTP (over-temperature protection), CLP (current limit protection), and LRP (lock-rotor protection) with automatic recovery. The FG/RD pin supports either tachometer output (FG mode) or rotor lock detection (RD mode), selected at power-up via external pull-up/down configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.3 V to 18 V - supports direct connection to automotive battery rail with transient tolerance. |
| Max Motor Power | 7 W - enables driving larger axial fans in LED headlight thermal management systems. |
| Current Limit Threshold | 800 mA - programmable over-current protection prevents MOSFET damage during stall or overload. |
| Speed Curve Options | 10%, 20%, or 30% - selectable via external R1 resistor to match acoustic and airflow requirements. |
| ESD Robustness (HBM) | 9 kV - exceeds AEC-Q100-002 requirements for automotive under-hood ESD immunity. |
| Package Type | DFN10 3×3×1 mm - surface-mount, thermally enhanced automotive-grade package with exposed thermal pad. |
| Output Configuration | Half-bridge (OUT1/OUT2) - drives single-coil BLDC fan without external gate drivers or discrete FETs. |
Pinout & Package
MLX90297LLW-AAF-108-RE is housed in a 10-pin DFN (LW) package measuring 3.0 mm × 3.0 mm × 1.0 mm with wettable flanks and an exposed thermal pad (pin 10). Pin numbering follows standard DFN convention: top-left corner = pin 1, counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; internal regulator powers logic and Hall sensor. |
| GND | Ground reference | Common return for power, logic, and motor current paths; ties to thermal pad. |
| OUT1 / OUT2 | Half-bridge outputs | Drive single-coil BLDC fan windings; complementary switching with dead-time control. |
| FG/RD | Configurable feedback pin | FG mode: open-drain tachometer output (pulse per revolution); RD mode: lock detection flag. |
| PWM | Speed control input | Accepts 0–100% duty cycle PWM signal; frequency range 100 Hz–20 kHz. |
| VREF | Reference voltage adjust | External Rvref sets internal reference for Hall threshold and speed regulation accuracy. |
| MINSP | Minimum speed setpoint | External Rminsp configures lowest allowed fan speed (10%/20%/30% of max). |
| R1 | Speed curve select | Resistor between R1 and GND selects linear, quadratic, or cubic speed vs. PWM response. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Rated for −40 °C to +150 °C ambient operation - suitable for under-hood automotive placement. |
| Integrated AGC Hall sensor | Auto-gains Hall signal amplitude to maintain precise commutation timing across magnet aging and temperature drift. |
| Configurable speed curve | Three selectable curves (10%/20%/30%) via R1 enable optimization of acoustic noise vs. cooling performance. |
| Built-in reverse polarity protection | Eliminates need for external series diode - reduces BOM cost and forward voltage drop in battery-connected systems. |
| Single-layer PCB compatibility | Minimal external components (only 4 resistors + decoupling cap) allow compact, low-cost board layout. |
Applications
| LED Headlight Cooling | Automotive Cabin Blower |
|---|---|
Use Scenario: Active thermal management of high-power LED modules in adaptive front lighting systems (AFS). IC Role / Device Role / Timing Role: Single-coil BLDC fan driver with FG tach feedback for closed-loop speed control and thermal derating. Use Value: 7 W drive capability and 9 kV HBM ESD withstand ensure reliable operation in high-EMI, high-temp under-hood environments. | Use Scenario: Low-noise airflow control in HVAC ducts for premium vehicle cabin comfort systems. IC Role / Device Role / Timing Role: PWM-controlled fan driver with configurable speed curve to meet NVH targets across fan speed range. Use Value: Soft start/soft switching and AGC Hall sensing reduce acoustic noise and torque ripple versus fixed-curve alternatives. |
| Engine Bay Auxiliary Fans | EV Battery Pack Coolant Pumps |
Use Scenario: Secondary cooling for turbochargers, power electronics, or transmission oil coolers in ICE and hybrid vehicles. IC Role / Device Role / Timing Role: Robust half-bridge driver with OTP, CLP, and LRP protections for unattended operation in harsh environments. Use Value: Built-in reverse polarity protection and 3.3 V start-up support direct integration into 12 V battery systems without added protection circuitry. | Use Scenario: Compact, silent coolant circulation in liquid-cooled traction battery modules requiring continuous low-speed operation. IC Role / Device Role / Timing Role: Constant-speed or PWM-modulated BLDC driver with FG feedback for pump RPM monitoring and fault logging. Use Value: DFN10 3×3 mm footprint and thermal pad enable high-power density mounting directly on battery pack control boards. |
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 functionality but rated for 960 mA current limit and packaged in DFN10 (LW) with different thermal pad design. | Targeted at higher-power white goods fans (e.g., refrigerator compressors) rather than automotive under-hood use. | Select when higher current headroom and non-automotive qualification are acceptable trade-offs for increased thermal margin. |
| MLX90297KZC-AAF-108 | SOIC8 package (7.6 × 4.9 mm), industrial/consumer grade, no AEC-Q100 qualification, same 800 mA current limit. | Intended for power supply fans and CPU coolers where automotive reliability and small footprint are not required. | Choose for cost-sensitive, non-automotive designs where PCB space and qualification are less critical than BOM simplicity. |
Compared with MLX90297KLW-AAF-109 and MLX90297KZC-AAF-108, the MLX90297LLW-AAF-108-RE uniquely combines AEC-Q100 Grade 0 qualification, 800 mA current limit, FG-mode tach output, and DFN10 3×3 mm packaging-making it the only option qualified for space-constrained, high-reliability automotive cooling applications requiring built-in reverse polarity protection.
Availability
MLX90297LLW-AAF-108-RE is available at Aetrix Electronics and suitable for LED headlight cooling, automotive cabin blowers, and engine bay auxiliary fans requiring stable component supply, automotive-grade reliability, and compact thermal management solutions.
Supply support for MLX90297LLW-AAF-108-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 intelligent motor control ICs for automotive and industrial markets.
The MLX90297 product line delivers highly integrated, AEC-Q100-qualified single-coil BLDC fan drivers optimized for low-noise, high-efficiency thermal management in automotive lighting, HVAC, and powertrain subsystems.
FAQ
What is the operating temperature range for the MLX90297LLW-AAF-108-RE?
The MLX90297LLW-AAF-108-RE is qualified per AEC-Q100 Grade 0 and operates from −40 °C to +150 °C ambient temperature. This rating applies to the full functional specification including Hall sensing, PWM response, current limiting, and thermal shutdown behavior. The DFN10 package's exposed thermal pad must be soldered to a sufficient copper area to maintain junction temperature within limits under 7 W load conditions. MLX90297LLW-AAF-108-RE maintains specified performance across this full range without derating.
Does the MLX90297LLW-AAF-108-RE require external MOSFETs?
No, the MLX90297LLW-AAF-108-RE integrates a fully protected half-bridge (OUT1/OUT2) with gate drivers, current sensing, and protection logic - no external MOSFETs, gate resistors, or bootstrap components are needed. It directly drives single-coil BLDC fans up to 7 W. The internal power stage uses optimized silicon to minimize conduction and switching losses, and thermal protection ensures safe operation even during locked-rotor conditions. MLX90297LLW-AAF-108-RE is designed as a complete, self-contained fan driver solution.
How is the FG/RD pin configured on the MLX90297LLW-AAF-108-RE?
The FG/RD pin on the MLX90297LLW-AAF-108-RE is configured at power-up by the state of the VDD pin: if VDD rises above 3.3 V before the FG/RD pin reaches valid logic level, it defaults to FG (tachometer) mode; if FG/RD is pulled low during power-up, it enters RD (rotor lock detection) mode. No register programming or I²C interface is involved - mode selection is hardware-determined and latched. MLX90297LLW-AAF-108-RE supports both modes without firmware changes or external controllers.
Can the MLX90297LLW-AAF-108-RE drive fans from 3.3 V logic-level PWM sources?
Yes, the MLX90297LLW-AAF-108-RE PWM input is compatible with 3.3 V CMOS logic levels (VIH ≥ 2.0 V, VIL ≤ 0.8 V) and accepts frequencies from 100 Hz to 20 kHz. It does not require level-shifting when driven by microcontrollers, FPGA GPIOs, or ASIC outputs operating at 3.3 V. Internal hysteresis prevents false triggering, and the input is ESD-protected to 9 kV HBM. MLX90297LLW-AAF-108-RE maintains accurate speed regulation across the full PWM duty cycle range (0–100%).
What external components are mandatory for basic operation of the MLX90297LLW-AAF-108-RE?
Four external components are mandatory: (1) 100 nF ceramic decoupling capacitor between VDD and GND, (2) pull-up resistor (Rpwm_pu) on PWM input, (3) Rvref resistor setting VREF voltage, and (4) Rminsp resistor configuring minimum speed. Optional components include R1 (speed curve), current-limiting resistor for FG output, and RC filter on VDD for noisy supplies. MLX90297LLW-AAF-108-RE requires no external diodes due to built-in reverse polarity protection.
MLX90297LLW-AAF-108-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-108-RE FAQ
1.How can I place an order for MLX90297LLW-AAF-108-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297LLW-AAF-108-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-108-RE reliable?
The price and inventory of MLX90297LLW-AAF-108-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-108-RE is usually 5 days.
3.What payment methods are accepted for MLX90297LLW-AAF-108-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297LLW-AAF-108-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297LLW-AAF-108-RE?
MLX90297LLW-AAF-108-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297LLW-AAF-108-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-108-RE?
For technical support, including MLX90297LLW-AAF-108-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297LLW-AAF-108-RE requirements.
6.How does Aetrix verify that MLX90297LLW-AAF-108-RE is sourced from the original manufacturer or authorized distributors?
All MLX90297LLW-AAF-108-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-108-RE meets industry standards.
7.What is the process for return or replacement of MLX90297LLW-AAF-108-RE?
All MLX90297LLW-AAF-108-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297LLW-AAF-108-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-108-RE part is unused and in its original packaging.
Return procedure for MLX90297LLW-AAF-108-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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