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Melexis Technologies NV MLX90297KZC-AAF-108-SP
- Part No.:
- MLX90297KZC-AAF-108-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 8-SMD, Flat Leads
- Datasheet:
-
MLX90297KZC-AAF-108-SP.pdf
- Description:
- IC MOTOR DRIVER 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,008
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Product details
Overview
MLX90297KZC-AAF-108-SP from Melexis is a 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 via external diode. It operates from 3.3 V to 18 V and targets low-noise cooling in VGA cards and white goods.
For engineers reviewing the MLX90297KZC-AAF-108-SP datasheet, pinout, applications, or equivalent options, key selection factors include its SOIC8-ZC package, FG output for tachometer feedback, resistor-configurable min-speed (Rminsp) and reference voltage (Rvref), and AEC-Q100 qualification for industrial use.
Technical Context
The MLX90297KZC-AAF-108-SP implements AGC-based commutation control to maintain stable rotation across varying magnetic field strengths, enabling consistent low-noise operation. Its PWM input accepts duty-cycle commands while internal logic interprets resistor-set parameters (Rvref, Rminsp, R1) to define speed curve slope and minimum speed threshold.
It integrates OTP (over-temperature protection) and CLP (current limit protection) with built-in soft-start timing and zero-crossing soft-switching to reduce EMI and mechanical stress. The FG/RD pin supports either tachometer output (FG) or rotor lock detection (RD), configured at order code level - this variant uses FG mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 3.3 V to 18 V - supports wide-input 12 V fan systems including automotive and industrial power rails. |
| Current Limit | 800 mA - hardware-enforced peak output current prevents MOSFET overstress during stall or startup. |
| Speed Curve Options | 10%, 20%, or 30% - selectable via external R1 resistor to match acoustic and thermal requirements. |
| ESD Robustness | 9 kV HBM - exceeds AEC-Q100-002 for handling in manufacturing and field service environments. |
| Package | SOIC8 with straight leads (ZC) - compatible with standard through-hole or surface-mount reflow assembly. |
| Output Configuration | Single-coil half-bridge (OUT1/OUT2) - drives unipolar BLDC fans without external gate drivers. |
| Feedback Interface | FG (tachometer) output - open-drain pulse signal synchronized to motor rotation for closed-loop speed monitoring. |
Pinout & Package
MLX90297KZC-AAF-108-SP is housed in an 8-pin SOIC package with straight leads (ZC variant), optimized for compact PCB layout and thermal dissipation in fan modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; requires local 100 nF decoupling capacitor. |
| GND | Ground reference | Common return path for power, logic, and output stages. |
| PWM | Speed command input | Accepts 0–100% duty-cycle PWM signal; frequency range 10–50 kHz typical. |
| FG/RD | Feedback or fault output | Open-drain FG signal (2 pulses/rev); configured as tachometer in this variant. |
| OUT1 / OUT2 | Half-bridge motor outputs | Drive single-coil BLDC fan windings; complementary switching with dead-time control. |
| VREF | Reference voltage node | Externally sets internal reference via Rvref resistor; defines speed scaling factor. |
| MINSP | Minimum speed setting | Resistor (Rminsp) determines lowest achievable RPM under PWM control. |
| LRP | Lock-rotor protection enable | Internal logic monitors back-EMF; asserts fault if rotor stalls for >1 s. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualified | Qualified per Grade 2 (−40 °C to +105 °C ambient), enabling use in automotive cabin cooling modules. |
| Configurable speed curve | Three discrete slopes (10%/20%/30%) set by single resistor R1 - enables acoustic tuning without firmware change. |
| Integrated soft start | Gradual ramp-up of drive strength over ~500 ms - eliminates mechanical jerk and audible click at power-on. |
| AGC-based commutation | Automatic gain control adapts Hall sensor sensitivity in real time - ensures reliable commutation across magnet aging and temperature drift. |
| Single-layer PCB support | Minimal external components (3 resistors + decoupling cap) allow cost-effective single-layer board implementation. |
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 fan driver with FG feedback for closed-loop RPM regulation and PWM-based dynamic speed adjustment. Use Value: Configurable 10%/20%/30% speed curves reduce acoustic noise at low loads while maintaining cooling headroom at full load. | Use Scenario: Low-power, long-life evaporator fan in domestic refrigerators where reliability and EMI must meet IEC 60335. IC Role / Device Role / Timing Role: Integrated Hall-sensor fan driver providing soft-start, current limiting, and rotor-lock detection for continuous-duty operation. Use Value: 800 mA current limit and built-in OTP prevent thermal runaway; AEC-Q100 qualification ensures 10+ year field life under cyclic temperature stress. |
| Air Purifier Blower | LED Headlight Thermal Management |
Use Scenario: Compact air purifiers needing ultra-quiet fan operation at low speeds (<1500 RPM) with rapid response to air quality sensor signals. IC Role / Device Role / Timing Role: PWM-controlled fan driver with resistor-configurable min-speed (Rminsp) to sustain airflow without audible tonal noise. Use Value: AGC-enabled Hall sensing maintains precise commutation even with weak or aged magnets - critical for consistent low-RPM stability. | Use Scenario: Thermally constrained LED headlight assemblies requiring fan activation only above 60 °C, with fail-safe shutdown on rotor stall. IC Role / Device Role / Timing Role: Fan controller with integrated LRP (lock-rotor protection) and FG feedback for thermal management loop closure. Use Value: FG output provides real-time RPM data to MCU; LRP fault flag triggers immediate LED dimming or shutdown to prevent thermal damage. |
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-ABF-108 | Same SOIC8-ZC package and specs, but FG/RD pin configured for RD (rotor lock detection) instead of FG. | Preferred when system-level fault reporting (e.g., stall detection) takes priority over tachometer feedback. | Select ABF-108 if rotor lock diagnostics are required; AAF-108 is optimal for RPM monitoring. |
| MLX90287KZC-AAA-000 | No current limiting circuit; fixed (non-configurable) speed curve; lower max motor power (5 W vs. 7 W). | Suitable for cost-sensitive, low-power fans where acoustic tuning and overcurrent protection are not required. | Choose AAA-000 only for legacy designs or sub-5 W applications lacking speed-curve flexibility. |
Compared with MLX90297KZC-ABF-108, the MLX90297KZC-AAF-108-SP provides tachometer output for closed-loop speed control rather than stall detection; versus MLX90287KZC-AAA-000, it adds current limiting, configurable speed curve, and higher 7 W motor power capability - making it suitable for next-gen low-noise, high-reliability cooling systems.
Availability
MLX90297KZC-AAF-108-SP is available at Aetrix Electronics and suitable for gaming GPU cooling, refrigerator evaporator fans, and LED headlight thermal management requiring stable component supply and long-term production continuity.
Supply support for MLX90297KZC-AAF-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 magnetic sensing, driver ICs, and thermal management solutions for automotive and industrial markets.
The MLX90297 product line delivers robust, low-noise single-coil BLDC fan drivers targeting high-reliability cooling in space-constrained, acoustically sensitive applications such as consumer electronics and automotive cabin systems.
FAQ
What is the maximum motor power supported by MLX90297KZC-AAF-108-SP?
The MLX90297KZC-AAF-108-SP supports up to 7 W motor power, verified under 12 V supply and 800 mA current limit conditions. This rating assumes adequate PCB copper area and ambient temperature ≤70 °C. Exceeding 7 W risks thermal shutdown or reduced lifetime due to junction temperature rise. Always validate thermal performance in final layout using MLX90297KZC-AAF-108-SP's OTP threshold of 150 °C.
Does MLX90297KZC-AAF-108-SP require external MOSFETs?
No, the MLX90297KZC-AAF-108-SP integrates a fully protected half-bridge (OUT1/OUT2) with gate drivers, current sensing, and protection logic - no external MOSFETs are needed. It directly drives single-coil BLDC fans rated up to 7 W. External components are limited to three configuration resistors (Rvref, Rminsp, R1), a decoupling capacitor, and optional pull-up on PWM.
How is the speed curve configured on MLX90297KZC-AAF-108-SP?
The speed curve (10%, 20%, or 30% slope) on MLX90297KZC-AAF-108-SP is set by resistor R1 connected between VREF and GND. Specific R1 values are defined in the MLX90297 datasheet: 10 kΩ → 10%, 20 kΩ → 20%, 47 kΩ → 30%. No firmware or programming is required - configuration is purely analog and hardware-determined at power-up.
Is MLX90297KZC-AAF-108-SP pin-compatible with MLX90287KZC-AAA-000?
Yes, MLX90297KZC-AAF-108-SP and MLX90287KZC-AAA-000 share identical SOIC8-ZC pinout and footprint. However, they differ functionally: MLX90297KZC-AAF-108-SP adds current limiting, configurable speed curve, and higher 7 W power capability. Direct replacement requires verifying that downstream firmware and external resistors align with the enhanced feature set.
What protection features does MLX90297KZC-AAF-108-SP include?
The MLX90297KZC-AAF-108-SP includes over-temperature protection (OTP), current-limit protection (CLP), lock-rotor protection (LRP), soft-start, soft-switching, and reverse polarity protection (via external diode). All protections trigger automatic recovery or safe shutdown without external supervision - critical for unattended operation in white goods and automotive systems.
MLX90297KZC-AAF-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-AAF-108-SP FAQ
1.How can I place an order for MLX90297KZC-AAF-108-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297KZC-AAF-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-AAF-108-SP reliable?
The price and inventory of MLX90297KZC-AAF-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-AAF-108-SP is usually 5 days.
3.What payment methods are accepted for MLX90297KZC-AAF-108-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297KZC-AAF-108-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297KZC-AAF-108-SP?
MLX90297KZC-AAF-108-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297KZC-AAF-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-AAF-108-SP?
For technical support, including MLX90297KZC-AAF-108-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297KZC-AAF-108-SP requirements.
6.How does Aetrix verify that MLX90297KZC-AAF-108-SP is sourced from the original manufacturer or authorized distributors?
All MLX90297KZC-AAF-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-AAF-108-SP meets industry standards.
7.What is the process for return or replacement of MLX90297KZC-AAF-108-SP?
All MLX90297KZC-AAF-108-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297KZC-AAF-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-AAF-108-SP part is unused and in its original packaging.
Return procedure for MLX90297KZC-AAF-108-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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