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Melexis Technologies NV MLX90412LLW-BAC-042-SP
- Part No.:
- MLX90412LLW-BAC-042-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-DFN Exposed Pad
- Datasheet:
-
MLX90412LLW-BAC-042-SP.pdf
- Description:
- IC FAN DRIVER 40V 2.2A 10DFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,510
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Product details
Overview
MLX90412LLW-BAC-042-SP 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%), and adaptive low-noise commutation. It operates from 3.5 V to 32 V supply, supports junction temperatures up to 150°C, and delivers up to 20 W motor power - ideal for 12 V/24 V boardnet cooling fans, seat blowers, and air/water pumps.
For engineers reviewing the MLX90412LLW-BAC-042-SP datasheet, pinout, applications, or equivalent options, key selection considerations include its AEC-Q100 qualification, programmable OVP thresholds (22 V / 35 V), I²C programmability for end-of-line tuning, FG/RD diagnostics output, and exposed-pad DFN10 3×3 package with wettable flanks.
Technical Context
The MLX90412LLW-BAC-042-SP implements closed-loop speed regulation using internal Hall sensing and real-time back-EMF monitoring, maintaining ±1% speed accuracy across load, voltage (3.5–32 V), and temperature (−40°C to +150°C). Its adaptive commutation algorithm dynamically selects between maximum-torque and ultra-low-noise sinewave modes based on motor characteristics and acoustic requirements.
Protections include programmable locked rotor protection (LRP), overvoltage protection (OVP) with dual thresholds (22 V for 12 V systems, 35 V for 24 V systems), short-circuit/overcurrent protection (OCP/CL), thermal shutdown (TSD), and open-drain FG/RD diagnostic output configurable via I²C. The device supports both PWM speed command and I²C register-based control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 3.5 V to 32 V - compatible with automotive 12 V and 24 V boardnets; robust to 40 V transients. |
| Max Motor Current | 2.2 A - enables up to 20 W motor drive without external current sense or heatsink in DFN10 package. |
| 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 per AEC-Q100 Rev-H for under-hood and cabin-mounted blower applications. |
| OVP Thresholds | Programmable: 22 V (12 V net) or 35 V (24 V net) - prevents damage during load dump events. |
| Diagnostic Output | FG/RD open-drain pin - reports fault status (OCP, LRP, TSD, OVP) and rotational speed feedback. |
| I²C Interface | Standard-mode (100 kHz) - enables fast prototyping, calibration, and end-of-line programming of protection thresholds and commutation mode. |
Pinout & Package
MLX90412LLW-BAC-042-SP is housed in an exposed-pad DFN10 (3 mm × 3 mm, 0.95 mm height) package with wettable flanks for automated optical inspection (AOI) and enhanced thermal performance. The package footprint occupies only 9 mm² and supports reflow soldering per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.5–32 V boardnet; internal regulator powers logic and gate drivers. |
| GND | Ground reference | Common return for power, logic, and Hall sensor; tied to exposed thermal pad. |
| OUT | Half-bridge output | Drives single-coil BLDC motor phase; integrated high-side and low-side MOSFETs. |
| HALL+ | Hall sensor positive input | Accepts differential signal from integrated Hall element; enables precise rotor position detection. |
| HALL− | Hall sensor negative input | Differential complement to HALL+; rejects common-mode noise in noisy automotive environments. |
| FG/RD | Open-drain diagnostic output | Signals rotational speed (FG) or faults (RD); configurable via I²C for active-low fault reporting. |
| PWM | Speed command input | Accepts 0–100% duty-cycle PWM (1–20 kHz); sets target speed in open/closed-loop mode. |
| SD | Standby enable input | Active-low pin; places device in ultra-low-power standby (<10 µA) when pulled high. |
| SCL | I²C clock line | Supports standard-mode I²C (100 kHz); used for programming protection thresholds and commutation mode. |
| SDA | I²C data line | Bi-directional I²C data channel; enables readback of diagnostics and real-time configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Hall-effect sensor | Eliminates need for external rotor position sensors - reduces BOM count and PCB space in single-coil BLDC designs. |
| Adaptive sinewave commutation | Reduces vibration and acoustic noise below industry benchmarks - critical for cabin-mounted seat blowers and HVAC modules. |
| Programmable OVP thresholds | Two preset levels (22 V / 35 V) match 12 V and 24 V automotive electrical architectures without external components. |
| FG/RD dual-function diagnostic pin | Provides real-time speed feedback and consolidated fault reporting - simplifies ECU interface and reduces wiring harness complexity. |
| I²C programmability | Enables field calibration of current limit, LRP delay, and commutation profile - supports multiple motor variants from one PCB design. |
Applications
| DC/DC Converter Cooling Fan | Battery Cooling Fan |
|---|---|
Use Scenario: Active thermal management of high-power DC/DC converters in EV traction inverters and onboard chargers. IC Role / Device Role / Timing Role: Single-coil BLDC driver with closed-loop speed control ensures consistent airflow despite wide input voltage swings (200–800 V bus) and ambient temperature shifts. Use Value: ±1% speed stability maintains optimal heat dissipation across operating conditions, extending converter lifetime and preventing thermal derating. | Use Scenario: Forced-air cooling of lithium-ion battery packs in hybrid and electric vehicles. IC Role / Device Role / Timing Role: Motor driver with programmable LRP and TSD protects against stalled fans in confined enclosures and ensures fail-safe shutdown at 150°C junction temp. Use Value: Integrated diagnostics (FG/RD) feed battery management system (BMS) with real-time fan health status - enabling predictive maintenance and thermal runaway mitigation. |
| Seat Blower Module | Air/Water Pump for HVAC |
Use Scenario: Cabin comfort system delivering heated/cooled air directly to vehicle seats via compact ducted blowers. IC Role / Device Role / Timing Role: Low-noise sinewave commutation driver minimizes audible whine and mechanical vibration at low-to-mid speeds (2,000–8,000 RPM). Use Value: Acoustic performance meets OEM NVH targets (<35 dB(A)) without external dampening - reducing module size and cost. | Use Scenario: Circulating coolant in electric HVAC compressors or cabin air heating modules. IC Role / Device Role / Timing Role: High-efficiency single-coil pump driver delivering 20 W mechanical output with adaptive torque commutation for variable-flow demand. Use Value: Closed-loop control maintains constant flow rate across battery voltage sag (e.g., 10.5 V cranking), ensuring uninterrupted cabin climate response. |
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-SP | Lower current limit (1.5 A), max 7 W output; no I²C interface; fixed OVP at 22 V. | Targeted at smaller axial fans (<10 W); lacks programmability and diagnostics granularity. | Select when cost sensitivity outweighs need for field calibration or multi-voltage support. |
| DRV10983ZRTVT | Texas Instruments part; sensorless back-EMF commutation; no integrated Hall sensor; requires external current sense resistor. | Suitable for higher-volume, non-AEC-Q100 applications where sensor integration is not required. | Choose if leveraging TI's motor control SDK and accepting added BOM cost/PCB area for external sensing. |
Compared with MLX90411LLW-BAA-002-SP and DRV10983ZRTVT, the MLX90412LLW-BAC-042-SP uniquely combines AEC-Q100 qualification, integrated Hall sensing, I²C programmability, and dual-threshold OVP - making it the only option supporting full-speed closed-loop control, acoustic optimization, and 24 V truck compatibility in a single DFN10 package.
Availability
MLX90412LLW-BAC-042-SP is available at Aetrix Electronics and suitable for automotive HVAC modules, battery thermal management systems, and DC/DC converter cooling requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.
Supply support for MLX90412LLW-BAC-042-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 magnetic sensing, infrared thermometry, and automotive driver ICs, with global R&D and manufacturing operations focused on high-reliability sensor and actuator solutions.
The MLX90412 product line delivers fully integrated, programmable BLDC drivers for automotive cooling and comfort systems - designed to replace discrete MOSFET + controller + Hall sensor assemblies while meeting stringent AEC-Q100, PPAP, and EMC requirements.
FAQ
What is the maximum continuous motor power supported by the MLX90412LLW-BAC-042-SP?
The MLX90412LLW-BAC-042-SP supports up to 20 W of continuous motor power, enabled by its 2.2 A current limit and optimized thermal design in the DFN10 package. This rating assumes operation within the specified 3.5–32 V supply range and −40°C to +150°C junction temperature limits. Actual power depends on PCB copper area, airflow, and ambient temperature - Melexis provides thermal resistance data (RθJA) in the official datasheet for accurate system-level derating of MLX90412LLW-BAC-042-SP.
Does the MLX90412LLW-BAC-042-SP require an external current sense resistor?
No, the MLX90412LLW-BAC-042-SP integrates current sensing internally and does not require an external shunt resistor. Its programmable current limit (1.5 A to 2.2 A) and overcurrent protection (OCP) are implemented using on-chip MOSFET RDS(on) monitoring. This eliminates BOM cost and PCB area associated with external sensing, and improves accuracy across temperature - a key advantage of MLX90412LLW-BAC-042-SP over sensorless alternatives.
Can the MLX90412LLW-BAC-042-SP operate in open-loop mode?
Yes, the MLX90412LLW-BAC-042-SP supports both open-loop and closed-loop speed control modes. In open-loop mode, speed is set directly via the PWM input without feedback; in closed-loop mode, it uses internal Hall sensing to regulate speed to ±1% accuracy regardless of load or supply variation. Mode selection is configured via I²C register - allowing dynamic switching in MLX90412LLW-BAC-042-SP firmware without hardware change.
What certifications apply to the MLX90412LLW-BAC-042-SP?
The MLX90412LLW-BAC-042-SP is AEC-Q100 Rev-H qualified for Grade 0 (−40°C to +150°C) and supports full Automotive PPAP documentation (PSW). It meets ISO/TS 16949 manufacturing requirements and is produced in IATF 16949-certified facilities. No additional third-party safety certifications (e.g., UL, VDE) apply, as MLX90412LLW-BAC-042-SP is a semiconductor driver, not a standalone power module or system.
How is the FG/RD pin used for diagnostics in the MLX90412LLW-BAC-042-SP?
The FG/RD pin on the MLX90412LLW-BAC-042-SP serves dual functions: as a frequency generator (FG) output reporting motor RPM, or as a fault indicator (RD) signaling overcurrent, locked rotor, overtemperature, or overvoltage events. Its behavior is programmable via I²C - users can select active-low fault pulse width, FG frequency division ratio, and RD fault latching mode. This flexibility makes FG/RD a scalable diagnostic interface for MLX90412LLW-BAC-042-SP across diverse ECU architectures.
MLX90412LLW-BAC-042-SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 10-DFN Exposed Pad
- Packaging:
- Tube
- 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-SP FAQ
1.How can I place an order for MLX90412LLW-BAC-042-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-SP reliable?
The price and inventory of MLX90412LLW-BAC-042-SP 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-SP is usually 5 days.
3.What payment methods are accepted for MLX90412LLW-BAC-042-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90412LLW-BAC-042-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90412LLW-BAC-042-SP?
MLX90412LLW-BAC-042-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-SP?
For technical support, including MLX90412LLW-BAC-042-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90412LLW-BAC-042-SP requirements.
6.How does Aetrix verify that MLX90412LLW-BAC-042-SP is sourced from the original manufacturer or authorized distributors?
All MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-SP meets industry standards.
7.What is the process for return or replacement of MLX90412LLW-BAC-042-SP?
All MLX90412LLW-BAC-042-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90412LLW-BAC-042-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 MLX90412LLW-BAC-042-SP part is unused and in its original packaging.
Return procedure for MLX90412LLW-BAC-042-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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