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Melexis Technologies NV MLX90412LLW-BAC-042-RE
- Part No.:
- MLX90412LLW-BAC-042-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-DFN Exposed Pad
- Datasheet:
-
MLX90412LLW-BAC-042-RE.pdf
- Description:
- IC FAN DRIVER 40V 2.2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,534
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Product details
Overview
MLX90412LLW-BAC-042-RE from Melexis is an automotive-grade single-coil brushless DC fan and pump driver IC with integrated high-sensitivity Hall-effect sensor, 2.2 A current limit, closed-loop speed control (±1% accuracy), and programmable protections including OVP (22 V or 35 V), LRP, and TSD. It operates from 3.5 V to 32 V supply and supports junction temperatures up to 150°C, targeting 12 V/24 V boardnet cooling applications such as battery cooling fans and seat blowers.
For engineers reviewing the MLX90412LLW-BAC-042-RE datasheet, pinout, applications, or equivalent options, key selection considerations include its DFN10 3×3 exposed-pad package, I²C programmability for end-of-line tuning, adaptive sinewave commutation for low acoustic noise, and AEC-Q100 Rev-H qualification for automotive deployment.
Technical Context
The MLX90412LLW-BAC-042-RE implements closed-loop speed regulation using internal Hall sensing and real-time feedback, maintaining ±1% speed accuracy across load, voltage (3.5–32 V), and temperature (−40°C to +150°C). Its adaptive commutation dynamically selects between maximum torque and ultra-low-noise sinewave modes based on motor characteristics.
Protections are fully programmable via I²C: Overvoltage protection thresholds (22 V for 12 V systems, 35 V for 24 V systems), locked rotor detection timeout, and FG/RD diagnostic output behavior. The device integrates PWM input interface, standby mode, and open/closed-loop control selection without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.5 V to 32 V - supports direct connection to automotive 12 V and 24 V boardnets with 40 V transient robustness. |
| Max Motor Current | 2.2 A - enables driving up to 20 W fan/pump loads while maintaining thermal safety under continuous operation. |
| Speed Control Accuracy | ±1% in closed-loop mode - eliminates speed drift due to battery variation, load changes, or production tolerances. |
| Operating Junction Temp | −40°C to +150°C - qualified for under-hood and cabin-mounted automotive locations without derating. |
| OVP Threshold Options | 22 V or 35 V - configurable per vehicle architecture to protect against load dump transients in cars or trucks. |
| Package | DFN10 3×3 mm with wettable flanks - enables automated optical solder inspection (AOI) and improves thermal dissipation via exposed pad. |
| I²C Interface | Standard-mode (100 kHz) - allows factory programming of protection thresholds, commutation mode, and diagnostics without additional hardware. |
Pinout & Package
MLX90412LLW-BAC-042-RE is housed in a 10-pin DFN package (3 mm × 3 mm, 0.9 mm height) with exposed thermal pad and wettable flanks for reliable solder joint inspection. Pinout conforms to Melexis standard DFN10 layout for the MLX90412-L family.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Accepts 3.5–32 V; internal regulator powers logic and gate drivers. |
| GND | Ground reference | Common return for power, logic, and Hall sensor; connects to exposed thermal pad. |
| OUTP / OUTN | Half-bridge outputs | Drive external N-channel MOSFETs in single-coil BLDC configuration; support 2.2 A peak current. |
| HALL+ | Hall sensor positive input | Connects to integrated Hall element; enables rotor position sensing without external sensor. |
| FG/RD | Open-drain diagnostic output | Programmable fault reporting (OCP, LRP, TSD, OVP) or tachometer signal (FG mode). |
| PWM | Speed command input | Accepts 0–100% duty cycle PWM (1–20 kHz); controls target speed in open/closed-loop modes. |
| STBY | Standby enable | Active-low input; places device in ultra-low quiescent current state (<10 µA) when asserted. |
| SCL / SDA | I²C serial interface | Enable read/write access to configuration registers for protection settings and commutation mode. |
| NC | No connect | Pin 10 is unconnected; no PCB trace or component required. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall-effect sensor | Eliminates need for external rotor position sensor, reducing BOM count and PCB area in single-coil BLDC designs. |
| Adaptive sinewave commutation | Reduces audible noise and mechanical vibration below industry-standard thresholds for cabin-mounted blowers and pumps. |
| Programmable locked rotor protection | Configurable timeout prevents thermal damage during startup failure or mechanical stall without fixed timer constraints. |
| FG/RD dual-function pin | Enables either real-time speed monitoring (FG) or fault signaling (RD) via software-selectable mode, simplifying system diagnostics. |
| AEC-Q100 Rev-H qualification | Validated for automotive use including stress testing at 150°C junction temperature and 2000-cycle temperature cycling. |
Applications
| Battery Cooling Fan | Seat Blower |
|---|---|
Use Scenario: Forced-air cooling of EV traction battery packs during fast charging or high-power discharge cycles. IC Role / Device Role / Timing Role: Single-coil BLDC driver with closed-loop speed control ensures consistent airflow despite voltage sag and ambient temperature shifts. Use Value: Maintains ±1% speed accuracy over −40°C to +150°C, preventing thermal runaway while enabling compact, low-noise fan module design. | Use Scenario: Climate-controlled seat ventilation using small axial fans mounted inside automotive seating assemblies. IC Role / Device Role / Timing Role: Low-vibration motor driver implementing sinewave commutation to meet OEM acoustic comfort specifications. Use Value: Reduces audible tonal noise by >15 dB compared to trapezoidal drive, satisfying interior NVH targets without added dampening hardware. |
| DC/DC Converter Cooling Fan | Air/Water Pump for HVAC |
Use Scenario: Thermal management of high-efficiency DC/DC converters in ADAS domain controllers and infotainment power supplies. IC Role / Device Role / Timing Role: Compact fan driver operating directly from 12 V boardnet with programmable OVP (22 V) to survive load dump events. Use Value: Enables <1 mm profile fan modules with full protection set, eliminating need for external TVS or current-sense circuitry. | Use Scenario: Variable-speed coolant circulation in electric HVAC compressors and cabin air heating systems. IC Role / Device Role / Timing Role: High-side/low-side gate driver with current limiting (2.2 A) and thermal shutdown (150°C) for 20 W pump motors. Use Value: Supports precise flow-rate control via PWM input and delivers 20 W output within AEC-Q100-compliant reliability envelope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar single-coil BLDC fan and pump driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MLX90411LLW-BAA-002-RE | Lower current limit (1.5 A), max 7 W output, no I²C interface, fixed OVP at 22 V. | Targeted at smaller fans (e.g., ECU cooling), lacks programmability and advanced diagnostics. | Select when cost sensitivity outweighs need for field configurability and higher power capability. |
| TB9058FNG | 3-phase driver with external Hall sensors, 3.5 A peak, no integrated Hall, requires external op-amps for current sense. | Supports multi-coil motors; suited for radiator fans but increases BOM and layout complexity. | Choose only if existing design uses 3-phase topology or requires >20 W output with discrete sensor placement. |
Compared with MLX90412LLW-BAC-042-RE, the MLX90411 offers lower cost and simpler integration for sub-7 W loads, while the TB9058FNG provides higher current but demands external sensing and more complex control firmware - making MLX90412LLW-BAC-042-RE optimal for scalable, low-noise, single-coil 12–24 V automotive cooling where programmability and footprint efficiency are critical.
Availability
MLX90412LLW-BAC-042-RE is available at Aetrix Electronics and suitable for battery cooling fans, seat blowers, and DC/DC converter cooling applications requiring stable component supply, AEC-Q100 compliance, and long-term automotive lifecycle support.
Supply support for MLX90412LLW-BAC-042-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 automotive driver ICs, with global manufacturing and AEC-Q100-focused product development.
The MLX90412-L product line delivers integrated single-coil BLDC drivers for automotive thermal management, combining Hall sensing, gate driving, and programmable protection in minimal DFN packages for space-constrained under-hood and cabin modules.
FAQ
What is the maximum continuous motor power supported by the MLX90412LLW-BAC-042-RE?
The MLX90412LLW-BAC-042-RE supports up to 20 W continuous motor power using its 2.2 A current limit and optimized thermal design in the DFN10 package. This rating assumes operation within the full −40°C to +150°C junction temperature range and proper PCB copper pour for heat dissipation. Derating is not required up to 150°C, as confirmed by AEC-Q100 Rev-H qualification testing.
Does the MLX90412LLW-BAC-042-RE require an external Hall sensor?
No, the MLX90412LLW-BAC-042-RE integrates a high-sensitivity Hall-effect sensor internally, eliminating the need for external rotor position sensing components. This integration reduces system cost and PCB area while improving reliability in harsh automotive environments. The HALL+ pin connects directly to the internal sensor element, requiring only passive filtering per Melexis layout guidelines.
How is overvoltage protection configured on the MLX90412LLW-BAC-042-RE?
Overvoltage protection on the MLX90412LLW-BAC-042-RE is programmable via I²C: users select either 22 V (for 12 V boardnet vehicles) or 35 V (for 24 V truck systems). The setting is stored in non-volatile memory and persists across power cycles. Activation triggers immediate shutdown with diagnostic flag assertion on the FG/RD pin, and recovery occurs automatically after voltage returns to safe range.
Can the MLX90412LLW-BAC-042-RE operate in both open-loop and closed-loop speed control modes?
Yes, the MLX90412LLW-BAC-042-RE supports both modes via the PWM input and internal configuration. In open-loop mode, speed follows PWM duty cycle linearly. In closed-loop mode, it achieves ±1% speed accuracy using Hall-based feedback - compensating for battery voltage variation, load changes, and motor tolerance. Mode selection is programmable through I²C register settings.
Is the MLX90412LLW-BAC-042-RE pin-compatible with other MLX90412 variants?
Yes, the MLX90412LLW-BAC-042-RE shares identical pinout and package (DFN10 3×3 mm) with all MLX90412-L grade variants, including MLX90411LLW-BAA-002-RE and MLX90412LLW-BAC-040-RE. This enables drop-in replacement within the same footprint when upgrading current capability or adding I²C programmability, provided PCB layout adheres to Melexis thermal and decoupling recommendations.
MLX90412LLW-BAC-042-RE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 10-DFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- -
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- -
- Interface:
- I2C, PWM
- Technology:
- -
- Step Resolution:
- -
- Applications:
- -
- Current - Output:
- 2.2A
- Voltage - Supply:
- 3.5V ~ 32V
- Voltage - Load:
- -
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 10-DFN (3x3)
MLX90412LLW-BAC-042-RE FAQ
1.How can I place an order for MLX90412LLW-BAC-042-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-RE reliable?
The price and inventory of MLX90412LLW-BAC-042-RE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90412LLW-BAC-042-RE is usually 5 days.
3.What payment methods are accepted for MLX90412LLW-BAC-042-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90412LLW-BAC-042-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90412LLW-BAC-042-RE?
MLX90412LLW-BAC-042-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-RE?
For technical support, including MLX90412LLW-BAC-042-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90412LLW-BAC-042-RE requirements.
6.How does Aetrix verify that MLX90412LLW-BAC-042-RE is sourced from the original manufacturer or authorized distributors?
All MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-RE meets industry standards.
7.What is the process for return or replacement of MLX90412LLW-BAC-042-RE?
All MLX90412LLW-BAC-042-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-RE part is unused and in its original packaging.
Return procedure for MLX90412LLW-BAC-042-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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