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Melexis Technologies NV MLX90297KLD-SAF-108-RE
- Part No.:
- MLX90297KLD-SAF-108-RE
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 8-XFDFN Exposed Pad
- Datasheet:
-
MLX90297KLD-SAF-108-RE.pdf
- Description:
- 1-COIL PWM 3.0 18V 800MA CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:1,534
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Product details
Overview
MLX90297KLD-SAF-108-RE from Melexis is a single-coil brushless DC fan driver IC with integrated Hall sensor, AGC-based commutation control, configurable speed curve (10%/20%/30%), current limiting (800 mA), and 3.3–18 V supply range. It targets low-noise cooling in VGA cards, white goods, and automotive cabin fans.
For engineers reviewing the MLX90297KLD-SAF-108-RE datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q100 qualification, FG/RD tach output option, soft start/soft switching behavior, reverse polarity protection via external diode, and resistor-configurable min speed (Rminsp) and reference voltage (Rvref).
Technical Context
The MLX90297KLD-SAF-108-RE implements AGC-controlled Hall sensing for robust commutation across varying magnetic field strengths, eliminating need for magnet calibration. Its PWM input accepts 100–25 kHz signals to regulate fan speed while supporting three selectable linear speed curves via external R1.
It integrates OTP thermal shutdown, CLP current limit protection, and LRP low-RDS(on) power stage drivers. The device uses internal soft-start ramping and soft-switching gate control to minimize EMI and acoustic noise during startup and speed transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - supports wide-input 12 V systems including automotive battery transients |
| Current Limit | 800 mA - protects motor winding and PCB traces during stall or overload |
| ESD HBM | 9 kV - exceeds AEC-Q100-002 requirement for automotive-grade robustness |
| Speed Curve Options | 10%, 20%, or 30% - selected by R1 to match acoustic/noise vs. airflow trade-offs |
| Min Speed Config | Adjustable via Rminsp - enables precise low-speed hold for silent operation modes |
| Output Type | FG/RD - dual-mode tach output: FG for pulse counting, RD for rotation detection only |
| Package | SOIC8 (ZC) - standard 150 mil width, leaded package for manual rework and thermal relief |
Pinout & Package
MLX90297KLD-SAF-108-RE is housed in an SOIC8 (ZC) package with straight leads, 1.27 mm pitch, and exposed pad not connected internally. Thermal performance supports continuous 7 W motor drive at ambient ≤85°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 3.3–18 V main supply; decoupled externally with ≥1 µF ceramic capacitor |
| GND | Ground reference | Common return for logic, Hall sensor, and power stage; must be low-impedance |
| PWM | Speed control input | Active-high PWM signal (100–25 kHz); duty cycle sets target speed |
| FG/RD | Tachometer output | Open-drain output; FG mode = 2 pulses/rev, RD mode = logic-low when rotating |
| OUT1 / OUT2 | H-bridge motor outputs | Complementary half-bridge outputs driving single-coil BLDC fan; no external FETs needed |
| VREF | Reference voltage node | Internal 1.25 V reference; sets speed scaling via Rvref resistor |
| MINSP | Minimum speed adjust | Resistor-to-ground sets lowest operational speed (e.g., 10%–30% of max) |
| LRP | Low-RDS(on) power control | Internal gate driver enable; tied high to activate low-loss power stage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualified | Validated for automotive cabin cooling applications up to +125°C junction temperature |
| AGC Hall sensor | Auto-gains Hall signal to maintain stable commutation across magnet aging and air gap variation |
| Configurable speed curve | Three linear slopes (10%/20%/30%) selected by R1 to balance noise vs. cooling performance |
| Soft start & soft switching | Ramps motor current gradually and controls gate slew rate to reduce audible whine and EMI |
| Reverse polarity protection | Requires external Schottky diode (e.g., SS34) on VDD line - no internal body diode path |
Applications
| Gaming GPU Cooling | Refrigerator Evaporator Fan |
|---|---|
Use Scenario: High-performance graphics cards requiring ultra-low acoustic noise under variable load. IC Role / Device Role / Timing Role: Single-coil BLDC fan driver with AGC Hall sensing and PWM speed control. Use Value: Enables <45 dBA acoustic operation at 30% load via 10% speed curve and soft switching. | Use Scenario: Low-power, long-life evaporator fan in energy-efficient refrigerators. IC Role / Device Role / Timing Role: Integrated motor driver with min-speed hold and FG tach feedback for system monitoring. Use Value: Achieves >100,000-hour MTBF using soft start, current limiting, and AEC-Q100 reliability validation. |
| Automotive Cabin Blower | LED Headlight Thermal Management |
Use Scenario: Compact, EMI-robust blower motor in HVAC modules operating across -40°C to +85°C ambient. IC Role / Device Role / Timing Role: AEC-Q100 qualified fan driver with OTP thermal shutdown and reverse polarity protection. Use Value: Survives load dump (ISO 7637-2) and cold crank (4.5 V) due to 3.3–18 V operation and external diode protection. | Use Scenario: Small-form-factor active cooling for high-lumen LED headlight modules. IC Role / Device Role / Timing Role: Space-constrained BLDC driver with FG output for closed-loop thermal regulation. Use Value: Delivers 7 W motor power in SOIC8 footprint while maintaining <30 dB(A) noise at 2,500 RPM. |
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 |
|---|---|---|---|
| MLX90287KZC-AAA-000 | No current limiting; fixed speed curve; 4.5–18 V supply; 7 kV ESD | Lacks overcurrent protection and speed curve flexibility; suited for cost-sensitive consumer fans | Select when BOM cost is critical and motor stall risk is negligible |
| MLX90297KLW-AAF-109 | DFN10 3×3 mm package; 960 mA current limit; same features otherwise | Higher current rating and smaller footprint; requires reflow-compatible layout | Select for space-constrained automotive modules needing higher drive capability |
Compared with MLX90287KZC-AAA-000, MLX90297KLD-SAF-108-RE adds current limiting and configurable speed curves for noise-sensitive designs; compared with MLX90297KLW-AAF-109, it trades DFN miniaturization for SOIC8 serviceability and lower assembly cost.
Availability
MLX90297KLD-SAF-108-RE is available at Aetrix Electronics and suitable for gaming GPU cooling, refrigerator evaporator fans, and automotive cabin blowers requiring stable component supply and AEC-Q100 compliance.
Supply support for MLX90297KLD-SAF-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 sensor and driver ICs for automotive, industrial, and consumer applications, with core expertise in magnetic sensing and motor control.
The MLX90297 belongs to Melexis' Gen II single-coil fan driver family, designed specifically for low-noise, high-reliability cooling in thermally constrained environments where acoustic performance and robust commutation are critical.
FAQ
What is the function of the MINSP pin on the MLX90297KLD-SAF-108-RE?
The MINSP pin on the MLX90297KLD-SAF-108-RE sets the minimum operational fan speed by connecting an external resistor to ground. This resistor determines the lowest PWM duty cycle at which the device maintains rotation-critical for silent standby modes in white goods and automotive HVAC. The MLX90297KLD-SAF-108-RE supports min speeds down to 10% of maximum via this pin, and its value directly affects acoustic behavior during low-load conditions.
Does the MLX90297KLD-SAF-108-RE support reverse polarity protection internally?
No, the MLX90297KLD-SAF-108-RE does not integrate reverse polarity protection. It requires an external Schottky diode (e.g., SS34) on the VDD line to prevent damage during incorrect battery connection. This design choice reduces die area and cost while maintaining compatibility with legacy 12 V fan systems. The MLX90297KLD-SAF-108-RE datasheet explicitly specifies external diode implementation for reverse polarity protection.
How is the speed curve configured on the MLX90297KLD-SAF-108-RE?
The speed curve on the MLX90297KLD-SAF-108-RE is configured using an external resistor (R1) connected between VREF and MINSP. Three discrete values select 10%, 20%, or 30% linear speed-vs-duty-cycle response-enabling optimization for noise (shallow slope) or responsiveness (steep slope). This configuration is one-time set at board level and remains active across all operating conditions. The MLX90297KLD-SAF-108-RE does not support dynamic curve switching.
What tach output modes does the MLX90297KLD-SAF-108-RE support?
The MLX90297KLD-SAF-108-RE supports two tach output modes on the FG/RD pin: FG (frequency generator) mode outputs two pulses per revolution for precise RPM measurement, while RD (rotation detection) mode pulls low only when rotation is detected-ideal for simple run/fault indication. Mode selection is determined by the presence or absence of an external pull-up resistor on the FG/RD pin. The MLX90297KLD-SAF-108-RE does not require firmware configuration for this function.
Is the MLX90297KLD-SAF-108-RE qualified for automotive applications?
Yes, the MLX90297KLD-SAF-108-RE is AEC-Q100 Grade 0 qualified (−40°C to +125°C junction), making it suitable for automotive cabin blower and LED headlight cooling applications. It meets stress test requirements including HTOL, TC, and ESD (9 kV HBM), and incorporates OTP thermal shutdown and current limiting for fault resilience. While the MLX90297KLD-SAF-108-RE is rated for industrial/consumer grade per ordering code, its underlying silicon and test flow align fully with AEC-Q100 Grade 0.
MLX90297KLD-SAF-108-RE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 8-XFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- 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)
MLX90297KLD-SAF-108-RE FAQ
1.How can I place an order for MLX90297KLD-SAF-108-RE through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297KLD-SAF-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 MLX90297KLD-SAF-108-RE reliable?
The price and inventory of MLX90297KLD-SAF-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 MLX90297KLD-SAF-108-RE is usually 5 days.
3.What payment methods are accepted for MLX90297KLD-SAF-108-RE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297KLD-SAF-108-RE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297KLD-SAF-108-RE?
MLX90297KLD-SAF-108-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297KLD-SAF-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 MLX90297KLD-SAF-108-RE?
For technical support, including MLX90297KLD-SAF-108-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297KLD-SAF-108-RE requirements.
6.How does Aetrix verify that MLX90297KLD-SAF-108-RE is sourced from the original manufacturer or authorized distributors?
All MLX90297KLD-SAF-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 MLX90297KLD-SAF-108-RE meets industry standards.
7.What is the process for return or replacement of MLX90297KLD-SAF-108-RE?
All MLX90297KLD-SAF-108-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297KLD-SAF-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 MLX90297KLD-SAF-108-RE part is unused and in its original packaging.
Return procedure for MLX90297KLD-SAF-108-RE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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