MLX90297LLW-ABF-108-SP

Overview

The MLX90297LLW-ABF-108-SP is a single-chip fan driver designed for driving single-coil brushless DC (BLDC) motors. It integrates a voltage regulator, Hall sensor with offset elimination, and an H-bridge power output controlled by a digital state machine. The device operates within a wide supply voltage range of 3.3 V to 18 V and supports PWM input frequencies from 100 Hz to 100 kHz. It features an integrated current limit of 800 mA, soft-start functionality, and low-noise soft switching. The component is housed in a 10-pin VFDFN exposed pad package and meets AEC-Q100 automotive standards.

Feature Summary

• Integrates single-coil fan driver with configurable speed curve via external resistor
• Features soft-start and soft-switching for low noise and reliable startup
• Includes comprehensive protection against rotor lock, undervoltage, thermal shutdown, and short circuits
• High magnetic sensitivity with 9 kV HBM ESD protection

Applications

• Brushless DC (BLDC) motor drivers
• Fan motor control systems
• Automotive cooling applications

Procurement Notes

Verify the specific suffix 'ABF' corresponds to the DFN10 package variant when sourcing. Confirm that the component is suitable for new designs despite general family status updates. Ensure compatibility with 3.3 V to 18 V supply rails and check for AEC-Q100 certification requirements in your target application environment before finalizing procurement.

Selection Notes

Select this model for applications requiring a highly integrated solution for single-coil BLDC fans. The DFN10 package is suitable for compact PCB designs where sensor proximity to the rotor is critical. Consider the 800 mA current limit and 18 V maximum voltage when sizing power supplies. The adjustable speed curve feature allows customization without additional digital interfaces.

Part Context

This component belongs to the MLX90297 series of 12V PWM single-coil fan drivers manufactured by Melexis Technologies NV. The series utilizes mixed-signal CMOS technology to provide efficient motor speed control through PWM input signals. The MLX90297LLW-ABF-108-SP specifically denotes the version packaged in a 10-VFDFN exposed pad format, distinguishing it from SOIC8 variants within the same functional family.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.