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Melexis Technologies NV MLX90297KZC-VAF-108-SP
- Part No.:
- MLX90297KZC-VAF-108-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 8-SMD, Flat Leads
- Datasheet:
-
MLX90297KZC-VAF-108-SP.pdf
- Description:
- IC MOTOR DRIVER 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,479
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Product details
Overview
MLX90297KZC-VAF-108-SP from Melexis is a single-coil brushless DC fan driver IC with integrated Hall sensor, AGC-controlled commutation, 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 MLX90297KZC-VAF-108-SP datasheet, pinout, applications, or equivalent options, key selection criteria include PWM-controlled speed profiling, built-in soft start/soft switching, reverse polarity protection via external diode, AEC-Q100 qualification, and SOIC8-ZC package compatibility.
Technical Context
The MLX90297KZC-VAF-108-SP implements AGC-based Hall sensor signal conditioning to maintain stable commutation across varying magnetic field strengths. Its configurable speed curve (set via Rminsp) and VREF bias (via Rvref) enable precise fan acoustic optimization without firmware changes.
It integrates OTP thermal shutdown, current-limiting protection (800 mA), and soft-switching control to minimize EMI and audible noise. The FG/RD output supports tachometer feedback or rotor lock detection, with dedicated MINSP and PWM inputs for dynamic speed mapping.
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 driver during stall or overload conditions |
| Speed Curve Options | 10%, 20%, or 30% - selectable via Rminsp resistor to tune acoustic profile vs. airflow trade-off |
| ESD HBM | 9 kV - exceeds AEC-Q100-002 requirement for robust handling in production environments |
| Output Configuration | SINGLE-COIL - drives one-phase BLDC fan with integrated Hall sensor and AGC commutation logic |
| Thermal Protection | OTP - internal overtemperature shutdown with automatic recovery prevents thermal runaway |
| Package | ZC: Straight-leads SOIC8 - surface-mount compatible with standard PCB assembly and thermal relief pads |
Pinout & Package
MLX90297KZC-VAF-108-SP uses the ZC variant of SOIC8 with straight leads, optimized for automated placement and thermal dissipation on single-layer PCBs. Pinout validated per Melexis schematic and ordering code documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | 3.3–18 V main supply rail; decoupled via Cdecoupling capacitor |
| GND | Ground reference | Common return path for power, logic, and sensor circuits |
| OUT1 / OUT2 | H-bridge outputs | Drive single-coil BLDC motor; complementary switching controlled by internal commutation logic |
| FG/RD | Feedback or lock detection | Open-drain output for tachometer (FG) or rotor lock alarm (RD), selected by order code suffix |
| PWM | Speed control input | Active-low PWM signal sets target speed; duty cycle maps to configured speed curve |
| VREF | Reference voltage adjust | External resistor (Rvref) sets internal reference for Hall sensor AGC and speed scaling |
| MINSP | Minimum speed setpoint | Resistor (Rminsp) configures minimum fan speed as % of max (10/20/30%) |
| LRP | Lock-rotor protection | Internal circuit detects stalled rotor and disables outputs after timeout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified for automotive-grade reliability (Grade 2: −40°C to +105°C ambient) |
| AGC Hall commutation | Auto-gains Hall sensor signal to ensure consistent timing across magnet strength variations |
| Configurable speed curve | Three discrete linear speed profiles (10%/20%/30%) reduce acoustic noise in sensitive environments |
| Soft start & soft switching | Gradual ramp-up and zero-crossing switching suppress mechanical jerk and EMI emissions |
| Single-layer PCB support | Minimal external components (Rvref, Rminsp, Rpwm_pu, Cdecoupling) enable compact layout |
Applications
| Gaming GPU Cooling | Refrigerator Evaporator Fan |
|---|---|
Use Scenario: High-performance graphics cards requiring silent, responsive fan control under variable thermal load. IC Role / Device Role / Timing Role: Single-coil BLDC driver with AGC Hall sensing and PWM speed modulation. Use Value: Configurable 10% speed curve minimizes audible whine at low loads while maintaining thermal headroom. | Use Scenario: Low-power, continuous-duty evaporator fan in energy-efficient refrigerators. IC Role / Device Role / Timing Role: Integrated motor driver with soft start and current limiting for long-life operation. Use Value: 800 mA current limit and OTP protection prevent coil burnout in sealed, inaccessible compartments. |
| Automotive Cabin Blower | LED Headlight Thermal Management |
Use Scenario: HVAC blower in passenger compartment requiring AEC-Q100 compliance and reverse polarity tolerance. IC Role / Device Role / Timing Role: Robust fan controller with external diode-based reverse polarity protection. Use Value: 9 kV HBM ESD rating ensures resilience against assembly-handling events and in-vehicle ESD coupling. | Use Scenario: Compact, high-reliability cooling for automotive LED headlight modules. IC Role / Device Role / Timing Role: Space-constrained single-coil driver with FG tach feedback for closed-loop thermal regulation. Use Value: SOIC8-ZC package enables direct replacement of legacy drivers without board redesign. |
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 |
|---|---|---|---|
| MLX90297KZC-AAF-108 | Same SOIC8-ZC package, identical pinout, FG output (not RD); no VAF suffix - industrial grade only | Designed for non-automotive industrial cooling; lacks automotive qualification documentation | Select when AEC-Q100 is not required and FG tach feedback suffices |
| MLX90297LLW-AAF-206 | DFN10 3×3 mm package, lower current limit (660 mA), automotive-grade (-40°C to +125°C junction) | Targeted at space-constrained automotive modules where thermal density exceeds SOIC8 capability | Select when board area is critical and 660 mA motor drive is sufficient |
Compared with MLX90297KZC-VAF-108-SP, the AAF-108 offers identical functionality without automotive qualification, while the LLW-AAF-206 trades package size and current capacity for higher temperature rating and smaller footprint - choice depends on qualification scope, thermal budget, and layout constraints.
Availability
MLX90297KZC-VAF-108-SP 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-compliant sourcing.
Supply support for MLX90297KZC-VAF-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 intelligent sensors and driver ICs for automotive, industrial, and consumer applications.
The MLX90297 product line delivers all-in-one single-coil BLDC fan drivers with AGC Hall sensing, targeting low-noise, high-reliability cooling in thermally demanding environments.
FAQ
What is the function of the MINSP pin on the MLX90297KZC-VAF-108-SP?
The MINSP pin on the MLX90297KZC-VAF-108-SP accepts an external resistor to configure the minimum fan speed as 10%, 20%, or 30% of maximum speed. This setting directly shapes the speed curve used during PWM-based speed control and is critical for acoustic optimization in low-load scenarios such as idle GPU or fridge operation. The resistor value determines which of the three fixed curves applies, and the configuration is latched at power-up.
Does the MLX90297KZC-VAF-108-SP support reverse polarity protection internally?
No, the MLX90297KZC-VAF-108-SP does not integrate reverse polarity protection. Per Melexis documentation, reverse polarity must be implemented externally using a diode on the VDD line. This differs from the MLX90287, which includes built-in reverse polarity protection. The MLX90297KZC-VAF-108-SP relies on external diode implementation to meet system-level robustness requirements, especially in automotive applications where battery connection errors may occur.
What does the "VAF" suffix indicate in MLX90297KZC-VAF-108-SP?
Within Melexis' ordering nomenclature, the "VAF" suffix in MLX90297KZC-VAF-108-SP denotes automotive qualification (V = automotive grade), FG tachometer output (A), and current limit of 800 mA (F). This distinguishes it from industrial variants (e.g., AAF) and confirms full AEC-Q100 compliance, making the MLX90297KZC-VAF-108-SP suitable for automotive cabin blower and LED headlight cooling applications requiring extended temperature and reliability validation.
Can the MLX90297KZC-VAF-108-SP drive a two-phase BLDC fan?
No, the MLX90297KZC-VAF-108-SP is specifically designed for single-coil BLDC fans. Its internal H-bridge (OUT1/OUT2) and AGC Hall commutation logic are optimized for one-phase motor topology. Driving a two-phase fan would require phase sequencing and independent Hall signal processing not supported by the MLX90297KZC-VAF-108-SP architecture. For multi-phase applications, Melexis offers separate drivers such as the MLX83100 series.
How is the speed curve configured on the MLX90297KZC-VAF-108-SP?
The speed curve on the MLX90297KZC-VAF-108-SP is configured using an external resistor connected to the MINSP pin. Three discrete linear curves - 10%, 20%, or 30% - are selected based on resistor value per Melexis' design guide. This resistor sets the minimum speed threshold relative to full-scale PWM input, enabling acoustic tuning without firmware changes. The MLX90297KZC-VAF-108-SP applies this curve continuously during operation, and the setting is read at power-on reset.
MLX90297KZC-VAF-108-SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 8-SMD, Flat Leads
- Packaging:
- Bulk
- 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:
- 8-SOIC
MLX90297KZC-VAF-108-SP FAQ
1.How can I place an order for MLX90297KZC-VAF-108-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297KZC-VAF-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 MLX90297KZC-VAF-108-SP reliable?
The price and inventory of MLX90297KZC-VAF-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 MLX90297KZC-VAF-108-SP is usually 5 days.
3.What payment methods are accepted for MLX90297KZC-VAF-108-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297KZC-VAF-108-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297KZC-VAF-108-SP?
MLX90297KZC-VAF-108-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297KZC-VAF-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 MLX90297KZC-VAF-108-SP?
For technical support, including MLX90297KZC-VAF-108-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297KZC-VAF-108-SP requirements.
6.How does Aetrix verify that MLX90297KZC-VAF-108-SP is sourced from the original manufacturer or authorized distributors?
All MLX90297KZC-VAF-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 MLX90297KZC-VAF-108-SP meets industry standards.
7.What is the process for return or replacement of MLX90297KZC-VAF-108-SP?
All MLX90297KZC-VAF-108-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297KZC-VAF-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 MLX90297KZC-VAF-108-SP part is unused and in its original packaging.
Return procedure for MLX90297KZC-VAF-108-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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