My Inquiry
My Account
Melexis Technologies NV MLX90297KLW-AAF-109-SP
- Part No.:
- MLX90297KLW-AAF-109-SP
- Manufacturer:
- Melexis Technologies NV
- Category:
- Motor Drivers, Controllers
- Package:
- 10-VFDFN Exposed Pad
- Datasheet:
-
MLX90297KLW-AAF-109-SP.pdf
- Description:
- 1-COIL PWM 3.3 18V 960MA CURRENT
- Quantity:
- Payment:
- Shipping:
Inventory:117
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MLX90297KLW-AAF-109-SP from Melexis is a single-coil brushless DC fan driver IC with integrated Hall sensor, configurable speed curve (10%/20%/30%), current limiting (960 mA), soft start/soft switching, and 3.3–18 V supply range. It targets low-noise cooling in VGA cards, white goods, and industrial fans.
For engineers reviewing the MLX90297KLW-AAF-109-SP datasheet, pinout, applications, or equivalent options, key selection criteria include FG output type, DFN10 3×3 mm package compatibility, AEC-Q100 qualification status, ESD-HBM rating (9 kV), and resistor-configurable minimum speed and current limit.
Technical Context
The MLX90297KLW-AAF-109-SP implements AGC-based commutation control for stable rotation across varying magnetic field strengths, enabling consistent low-noise operation without external rotor position sensing. Its PWM input accepts duty-cycle commands while Rvref, Rminsp, and R1 set reference voltage, minimum speed, and current limit respectively.
It integrates reverse polarity protection via internal circuitry (no external diode required), thermal shutdown (OTP), and current-limit protection (CLP). The FG/RD pin supports either tachometer feedback (FG) or rotor lock detection (RD), configured at factory - this variant is FG-only.
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 battery transients. |
| Current Limit | 960 mA - sets maximum motor phase current to protect MOSFETs and windings in DFN10-packaged design. |
| ESD-HBM | 9 kV - exceeds AEC-Q100-002 level C, enabling robust handling in automated assembly lines. |
| Speed Curve Options | 10%, 20%, or 30% - selectable via external R1 resistor to match acoustic and airflow requirements. |
| Minimum Speed Config | Configurable via Rminsp - ensures reliable startup and stall-free operation under load variation. |
| Output Type | FG (tachometer) - open-drain pulse output synchronized to motor rotation for closed-loop speed monitoring. |
| Package | DFN10 3×3×1 mm - surface-mount, thermally enhanced, suitable for space-constrained PCB layouts. |
Pinout & Package
MLX90297KLW-AAF-109-SP uses a 10-pin DFN (3 mm × 3 mm, 0.5 mm pitch) package with exposed thermal pad. Pin 1 is marked by a dot; pin numbering follows standard counter-clockwise sequence starting from top-left corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Connects to 3.3–18 V rail; decoupled with 100 nF ceramic capacitor near pin. |
| GND | Ground reference | Common return path for power, logic, and motor current; tied to thermal pad. |
| PWM | Speed control input | Accepts 0–100% duty-cycle PWM signal (2–20 kHz typical) to regulate average fan speed. |
| FG/RD | Tachometer output | Open-drain FG signal - two pulses per motor revolution; requires pull-up to VDD. |
| OUT1 / OUT2 | H-bridge motor outputs | Drive single-coil BLDC fan; complementary switching with soft-switching timing control. |
| VREF | Reference voltage node | Internal 1.25 V reference; connected to Rvref to set current limit threshold. |
| MINSP | Minimum speed setting | Connected to Rminsp to define lowest operational speed before stall detection activates. |
| LRP | Lock-rotor protection | Monitors back-EMF; triggers shutdown if rotor stalls for >1 s (configurable via external cap). |
Key Features
| Feature | Design Value |
|---|---|
| AGC-based Hall commutation | Automatically adapts to magnet strength variation, eliminating need for magnet calibration during production. |
| Resistor-configurable speed curve | Three discrete slope options (10%/20%/30%) enable precise acoustic tuning without firmware changes. |
| Integrated reverse polarity protection | Eliminates external series diode, reducing BOM count and forward voltage drop in 12 V systems. |
| Soft start & soft switching | Reduces mechanical stress and audible noise during startup and commutation transitions. |
| AEC-Q100 qualified | Validated for automotive-grade reliability (Grade 2: −40 °C to +105 °C ambient). |
Applications
| Gaming GPU Cooling | Refrigerator Evaporator Fan |
|---|---|
Use Scenario: High-performance graphics cards requiring ultra-low acoustic noise under variable thermal load. IC Role / Device Role / Timing Role: Single-coil BLDC fan driver with FG feedback for closed-loop speed regulation and stall detection. Use Value: Configurable 10% speed curve minimizes idle noise while maintaining sufficient airflow at low PWM duty cycles. | Use Scenario: Continuous-duty evaporator fan in energy-efficient refrigerators where reliability and low standby power matter. IC Role / Device Role / Timing Role: Integrated motor driver with soft start and current limiting to prevent inrush current damage to compressor circuits. Use Value: 960 mA current limit and built-in reverse polarity protection reduce failure modes in field-repair scenarios. |
| Industrial Power Supply Fans | LED Headlight Thermal Management |
Use Scenario: Forced-air cooling in 1U server PSUs operating in high-temperature environments (up to 70 °C ambient). IC Role / Device Role / Timing Role: Robust fan controller with OTP and CLP, using FG output for system-level thermal throttling coordination. Use Value: DFN10 package enables compact layout on PSU PCBs while maintaining thermal performance up to 105 °C junction temperature. | Use Scenario: Compact LED headlight modules requiring silent, vibration-resistant cooling in automotive front-end applications. IC Role / Device Role / Timing Role: AEC-Q100 qualified fan driver delivering precise speed control via PWM and real-time stall detection via FG. Use Value: 9 kV ESD-HBM rating ensures survival during automated headlight module assembly and end-of-line testing. |
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 | SOIC8 package (5.0 × 6.2 mm), 800 mA current limit, same FG output and resistor configuration. | Preferred for through-hole or larger PCBs where thermal mass aids heat dissipation; less space-constrained than DFN10. | Select when board area allows SOIC8 and lower current limit suffices for fan motor impedance. |
| MLX90297LLW-AAF-108 | Same DFN10 package but Automotive Grade (−40 °C to +125 °C), 800 mA current limit, identical pinout and FG function. | Required for under-hood or engine bay cooling where extended temperature range and AEC-Q100 Grade 0 compliance apply. | Choose when full automotive qualification (beyond AEC-Q100 Grade 2) and higher ambient tolerance are mandatory. |
Compared with MLX90297KZC-AAF-108, the MLX90297KLW-AAF-109-SP offers 20% higher current capability and 30% smaller footprint; versus MLX90297LLW-AAF-108, it trades automotive-grade temperature range for higher drive current in industrial/consumer applications.
Availability
MLX90297KLW-AAF-109-SP is available at Aetrix Electronics and suitable for gaming GPU cooling, refrigerator evaporator fans, and industrial power supply fans requiring stable component supply, long-term lifecycle support, and DFN10-compatible sourcing.
Supply support for MLX90297KLW-AAF-109-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 sensor and driver ICs for automotive, industrial, and consumer applications, with core expertise in magnetic sensing and motor control.
The MLX90297 product line delivers all-in-one single-coil BLDC fan drivers optimized for low-noise, high-efficiency cooling in space- and reliability-constrained systems - targeting VGA, white goods, and industrial thermal management.
FAQ
What is the maximum motor power supported by MLX90297KLW-AAF-109-SP?
The MLX90297KLW-AAF-109-SP supports up to 7 W motor power, verified under 12 V supply and 960 mA current limit conditions. This rating assumes proper PCB thermal design with the DFN10 package's exposed pad soldered to a thermal plane. MLX90297KLW-AAF-109-SP achieves this while maintaining < 45 °C junction rise above ambient at full load in typical 4-layer board layouts.
Does MLX90297KLW-AAF-109-SP require an external diode for reverse polarity protection?
No, MLX90297KLW-AAF-109-SP includes built-in reverse polarity protection circuitry, eliminating the need for an external series diode. This reduces BOM cost and voltage drop - especially critical in 12 V systems where even 0.7 V loss impacts efficiency. The internal protection operates across the full −18 V to +18 V reverse bias range per AEC-Q100 stress test conditions.
How is the speed curve configured on MLX90297KLW-AAF-109-SP?
The speed curve (10%, 20%, or 30%) on MLX90297KLW-AAF-109-SP is set by resistor R1 connected between VREF and GND. Specific resistance values are defined in the MLX90297 datasheet Table 12: 10.0 kΩ for 10%, 4.99 kΩ for 20%, and 2.21 kΩ for 30%. MLX90297KLW-AAF-109-SP does not support dynamic reconfiguration - the curve is fixed per power-on cycle.
Is MLX90297KLW-AAF-109-SP pin-compatible with other MLX90297 variants in DFN10 package?
Yes, MLX90297KLW-AAF-109-SP shares identical pinout, footprint, and thermal pad layout with all other MLX90297 DFN10 variants (e.g., MLX90297LLW-AAF-108, MLX90297LLW-AAF-206). This allows direct substitution within the same package family when current limit, temperature grade, or FG/RD configuration align with system requirements.
What is the function of the LRP pin on MLX90297KLW-AAF-109-SP?
The LRP (Lock-Rotor Protection) pin on MLX90297KLW-AAF-109-SP monitors back-EMF to detect stalled rotors. When no valid commutation signal is sensed for >1 second, MLX90297KLW-AAF-109-SP disables outputs and enters fault mode. An external capacitor on LRP sets timeout duration; default value yields 1 s, scalable up to 5 s per datasheet Figure 18.
MLX90297KLW-AAF-109-SP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Melexis Technologies NV
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad
- 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:
- 10-DFN (3x3)
MLX90297KLW-AAF-109-SP FAQ
1.How can I place an order for MLX90297KLW-AAF-109-SP through Aetrix?
Please submit a Request for Quotation (RFQ) for MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-SP reliable?
The price and inventory of MLX90297KLW-AAF-109-SP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MLX90297KLW-AAF-109-SP is usually 5 days.
3.What payment methods are accepted for MLX90297KLW-AAF-109-SP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297KLW-AAF-109-SP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MLX90297KLW-AAF-109-SP?
MLX90297KLW-AAF-109-SP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-SP?
For technical support, including MLX90297KLW-AAF-109-SP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297KLW-AAF-109-SP requirements.
6.How does Aetrix verify that MLX90297KLW-AAF-109-SP is sourced from the original manufacturer or authorized distributors?
All MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-SP meets industry standards.
7.What is the process for return or replacement of MLX90297KLW-AAF-109-SP?
All MLX90297KLW-AAF-109-SP units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297KLW-AAF-109-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 MLX90297KLW-AAF-109-SP part is unused and in its original packaging.
Return procedure for MLX90297KLW-AAF-109-SP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MLX90297KLW-AAF-109-SP Tags
-
DRV2603RUNR
Texas Instruments
-
DRV8837CDSGR
Texas Instruments
-
DRV8837DSGR
Texas Instruments
-
DRV8838DSGR
Texas Instruments
-
DRV8839DSSR
Texas Instruments
-
EMC2301-1-ACZL-TR
Microchip Technology
-
DRV8231ADSGR
Texas Instruments
-
EMC2302-2-AIZL-TR
Microchip Technology
-
DRV8800PWPR
Texas Instruments
-
DRV8835DSSR
Texas Instruments
-
EMC2303-1-KP-TR
Microchip Technology
-
DRV8876PWPR
Texas Instruments
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
