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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Motor Drivers, Controllers

Melexis Technologies NV MLX90297KLD-SAF-308-RE

Name: MLX90297KLD-SAF-308-RE
Brand: Melexis Technologies NV
SKU: MLX90297KLD-SAF-308-RE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MLX90297KLD-SAF-308-RE

Manufacturer:: Melexis Technologies NV

Category:: Motor Drivers, Controllers

Package:: 8-XFDFN Exposed Pad

Datasheet:: MLX90297KLD-SAF-308-RE.pdf

Description:: 1-COIL PWM 3.0 18V 800MA CURRENT

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Product details

Overview

MLX90297KLD-SAF-308-RE 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 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-308-RE datasheet, pinout, applications, or equivalent options, key selection factors include its AEC-Q100 Grade 0 qualification, FG/RD tach output option, external resistor-based speed curve tuning, reverse polarity protection via external diode, and DFN10 3×3×1 mm package compatibility with high-density PCB layouts.

Technical Context

The MLX90297KLD-SAF-308-RE implements AGC-controlled commutation for stable motor operation across varying magnetic field strengths, enabling consistent low-noise performance without magnet calibration. Its PWM input accepts 100–25 kHz signals to set target speed while Rvref, Rminsp, and R1 configure minimum speed, reference voltage, and current limit thresholds.

It integrates thermal shutdown (OTP), current limit protection (CLP), and logic-level PWM interface with internal pull-up on Vpwm_pu. The FG/RD output supports either frequency-generator (FG) or rotation-detection (RD) mode, selected by ordering code suffix - here "SAF" confirms FG mode per Melexis ordering matrix.

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	800 mA - protects motor winding and driver during stall or overload without external sense resistor.
Speed Curve Config	10%/20%/30% - selectable via R1 to match acoustic requirements of GPU coolers or fridge evaporator fans.
ESD HBM	9 kV - exceeds AEC-Q100-002 for robust handling in automotive assembly environments.
Output Topology	Single-coil half-bridge - drives unipolar BLDC fans with integrated commutation logic and Hall AGC.
Tach Output	FG mode - open-drain frequency-generator output synchronized to motor rotation for precise RPM monitoring.
Package	DFN10 3×3×1 mm - surface-mount, thermally enhanced, footprint-compatible with MLX90297KLW variants.

Pinout & Package

MLX90297KLD-SAF-308-RE uses a 10-pin DFN package (3 mm × 3 mm × 1 mm, exposed thermal pad) with wettable flanks. Pin numbering follows standard Melexis DFN10 layout (pin 1 = VDD, counterclockwise).

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power supply input	Primary 3.3–18 V rail; decoupled externally with Cdecoupling near pin.
GND	Ground reference	Common return for power, logic, and motor paths; connected to exposed thermal pad.
OUT1 / OUT2	Half-bridge motor outputs	Drive single-coil BLDC fan; OUT1 = high-side, OUT2 = low-side with complementary switching.
FG/RD	Tachometer output	Open-drain FG signal - pulses per revolution; requires external pull-up for logic-level interface.
PWM	Speed control input	Logic-level PWM (100–25 kHz); duty cycle sets target fan speed independent of supply variation.
VREF	Reference voltage node	Internal 1.25 V reference; Rvref sets VREF bias for speed curve configuration.
MINSP	Minimum speed setting	Rminsp configures lowest operational speed (e.g., 10% base speed) to prevent stall at low PWM.
LRP	Reverse polarity detection	Monitors supply polarity; triggers shutdown if reverse-biased - requires external diode per datasheet.

Key Features

Feature	Design Value
AEC-Q100 Grade 0 qualified	Rated for −40 °C to +150 °C ambient, validated for automotive cabin fan applications.
Configurable speed curve	Three discrete linear ramp profiles (10%/20%/30%) set by single resistor R1 - no firmware or EEPROM needed.
Integrated soft start & soft switching	Eliminates mechanical jerk and audible coil whine during startup and speed transitions.
AGC-based Hall commutation	Maintains optimal timing across magnet aging, temperature drift, and air-gap variation - no recalibration required.
Single-layer PCB support	Minimal external components (Rvref, Rminsp, R1, Cdecoupling, external diode) enable compact 1-layer board designs.

Applications

Gaming GPU Cooling	Refrigerator Evaporator Fan
Use Scenario: High-performance graphics cards requiring silent, responsive fan control under dynamic thermal load. IC Role / Device Role / Timing Role: Single-coil BLDC driver with AGC Hall sensing and PWM-based speed regulation. Use Value: 10%/20%/30% configurable speed curves reduce acoustic noise at low loads while maintaining cooling headroom at peak GPU power.	Use Scenario: Low-power, continuous-duty evaporator fan in energy-efficient refrigerators. IC Role / Device Role / Timing Role: Motor controller with soft start and current limiting to extend compressor/fan lifetime. Use Value: 800 mA current limit prevents winding overheating during ice buildup; FG output enables precise defrost cycle timing.
Automotive Cabin Blower	LED Headlight Thermal Management
Use Scenario: HVAC blower motor in passenger compartment where ESD robustness and temperature stability are critical. IC Role / Device Role / Timing Role: AEC-Q100 Grade 0 fan driver with reverse polarity protection and OTP shutdown. Use Value: 9 kV HBM ESD rating ensures reliability during vehicle assembly; 3.3–18 V range accommodates cold-crank and load-dump conditions.	Use Scenario: Compact thermal fan in sealed LED headlight modules with space and noise constraints. IC Role / Device Role / Timing Role: Low-profile DFN10 driver enabling direct integration into headlight PCBs. Use Value: 3×3 mm footprint allows placement adjacent to LED array; soft switching minimizes EMI interference with camera sensors.

Gaming GPU Cooling

Refrigerator Evaporator Fan

Use Scenario: High-performance graphics cards requiring silent, responsive fan control under dynamic thermal load.

IC Role / Device Role / Timing Role: Single-coil BLDC driver with AGC Hall sensing and PWM-based speed regulation.

Use Value: 10%/20%/30% configurable speed curves reduce acoustic noise at low loads while maintaining cooling headroom at peak GPU power.

Use Scenario: Low-power, continuous-duty evaporator fan in energy-efficient refrigerators.

IC Role / Device Role / Timing Role: Motor controller with soft start and current limiting to extend compressor/fan lifetime.

Use Value: 800 mA current limit prevents winding overheating during ice buildup; FG output enables precise defrost cycle timing.

Automotive Cabin Blower

LED Headlight Thermal Management

Use Scenario: HVAC blower motor in passenger compartment where ESD robustness and temperature stability are critical.

IC Role / Device Role / Timing Role: AEC-Q100 Grade 0 fan driver with reverse polarity protection and OTP shutdown.

Use Value: 9 kV HBM ESD rating ensures reliability during vehicle assembly; 3.3–18 V range accommodates cold-crank and load-dump conditions.

Use Scenario: Compact thermal fan in sealed LED headlight modules with space and noise constraints.

IC Role / Device Role / Timing Role: Low-profile DFN10 driver enabling direct integration into headlight PCBs.

Use Value: 3×3 mm footprint allows placement adjacent to LED array; soft switching minimizes EMI interference with camera sensors.

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
MLX90297KLW-AAF-109	Same DFN10 package, identical FG mode, but rated for 960 mA current limit and industrial grade (−40 °C to +125 °C).	Preferred for higher-power CPU coolers or industrial power supplies where >800 mA margin is required.	Select when higher current headroom and non-automotive qualification suffice; no PCB change needed.
MLX90297LLW-AAF-206	Same DFN10 package and FG mode, but AEC-Q100 Grade 1 (−40 °C to +125 °C) and 660 mA current limit.	Suitable for cost-sensitive automotive body electronics where full Grade 0 is not mandated.	Choose for lower-cost automotive modules with relaxed thermal envelope and reduced current demand.

Compared with MLX90297KLD-SAF-308-RE, the KLW-AAF-109 offers higher current capability for industrial cooling, while the LLW-AAF-206 trades current limit and temperature grade for automotive cost optimization - all share identical pinout, FG functionality, and resistor-based configuration architecture.

Availability

MLX90297KLD-SAF-308-RE is available at Aetrix Electronics and suitable for automotive cabin blowers, refrigerator evaporator fans, and gaming GPU cooling systems requiring stable component supply, AEC-Q100 compliance, and low-noise motor control.

Supply support for MLX90297KLD-SAF-308-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 product line delivers all-in-one single-coil BLDC fan drivers optimized for low-noise, high-reliability cooling in space-constrained environments - targeting VGA cards, white goods, and automotive thermal management.

FAQ

What is the operating temperature range for MLX90297KLD-SAF-308-RE?

The MLX90297KLD-SAF-308-RE is qualified to AEC-Q100 Grade 0, supporting operation from −40 °C to +150 °C ambient temperature. This rating covers under-hood and cabin-mounted automotive fan applications, as well as high-temperature industrial enclosures where thermal derating must be minimized. The device's OTP protection activates above this range to prevent permanent damage.

Does MLX90297KLD-SAF-308-RE require an external Hall sensor?

No, MLX90297KLD-SAF-308-RE integrates a highly sensitive Hall sensor with automatic gain control (AGC), eliminating the need for an external sensor. The AGC dynamically adjusts sensitivity to maintain accurate commutation timing across magnet aging, temperature shifts, and air-gap variations - a key differentiator from discrete Hall + driver solutions.

How is the speed curve configured on MLX90297KLD-SAF-308-RE?

The speed curve (10%, 20%, or 30% linear ramp) on MLX90297KLD-SAF-308-RE is set by resistor R1 connected between MINSP and GND. Specific resistance values are defined in the MLX90297 datasheet Table 12; no programming or EEPROM write is required. This analog configuration enables fast, repeatable tuning during production without firmware tools.

What tach output mode does MLX90297KLD-SAF-308-RE support?

MLX90297KLD-SAF-308-RE supports FG (frequency-generator) mode only, as indicated by the "SAF" suffix in its order code. The FG/RD pin outputs an open-drain square wave with pulses per revolution, compatible with standard microcontroller input capture peripherals. RD (rotation-detection) mode is not enabled on this variant.

Is reverse polarity protection built-in on MLX90297KLD-SAF-308-RE?

MLX90297KLD-SAF-308-RE includes reverse polarity detection circuitry (LRP pin) but requires an external series diode for full protection - unlike MLX90287 which has built-in protection. This design choice reduces forward voltage drop and thermal loss in high-current automotive applications where external diode selection can be optimized for efficiency.

MLX90297KLD-SAF-308-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-308-RE FAQ

1.How can I place an order for MLX90297KLD-SAF-308-RE through Aetrix?

Please submit a Request for Quotation (RFQ) for MLX90297KLD-SAF-308-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-308-RE reliable?

The price and inventory of MLX90297KLD-SAF-308-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-308-RE is usually 5 days.

3.What payment methods are accepted for MLX90297KLD-SAF-308-RE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MLX90297KLD-SAF-308-RE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MLX90297KLD-SAF-308-RE?

MLX90297KLD-SAF-308-RE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MLX90297KLD-SAF-308-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-308-RE?

For technical support, including MLX90297KLD-SAF-308-RE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MLX90297KLD-SAF-308-RE requirements.

6.How does Aetrix verify that MLX90297KLD-SAF-308-RE is sourced from the original manufacturer or authorized distributors?

All MLX90297KLD-SAF-308-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-308-RE meets industry standards.

7.What is the process for return or replacement of MLX90297KLD-SAF-308-RE?

All MLX90297KLD-SAF-308-RE units undergo pre-shipment inspection (PSI). If there is an issue with MLX90297KLD-SAF-308-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-308-RE part is unused and in its original packaging.

Return procedure for MLX90297KLD-SAF-308-RE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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