MLX90297KZC-VAF-108-SP

Overview

The MLX90297KZC-VAF-108-SP is a single-chip fan driver designed for driving single-coil brushless DC 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 supports PWM input signals with a frequency range of 100 Hz to 100 kHz. It operates within a supply voltage range of 3.3 V to 18 V and provides an output current limit of 800 mA. Packaged in an SOIC-8 surface-mount format, it meets AEC-Q100 automotive qualification standards.

Feature Summary

• Integrates a single-coil fan driver with a half-bridge output stage for efficient speed control via PWM switching.
• Features high magnetic sensitivity and configurable speed curves through external resistor adjustment.
• Includes integrated voltage regulation and advanced offset elimination systems for reliable operation.
• Provides robust protection including 9 kV HBM ESD tolerance and electrical over-stress safeguards.

Applications

• Consumer electronics cooling fans
• Single-coil BLDC motor drives
• Automotive ventilation systems

Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before initiating any new procurement or design-in activities. Confirm that existing inventory levels meet project requirements as this component may be phased out. Ensure compatibility with current PCB layouts and BOM constraints given the discontinuation notice. Consult official Melexis documentation for final availability and lifecycle updates prior to ordering.

Selection Notes

Select this component for applications requiring a compact, single-layer PCB solution for single-coil fan drivers. It is suitable where low BOM cost and small form factor are priorities. Verify that the 800 mA current limit and 3.3 V to 18 V operating range align with specific motor specifications. Consider the AEC-Q100 qualification if automotive reliability is required despite the NRND status.

Part Context

This part belongs to the MLX90297 series of 12V PWM single-coil fan drivers from Melexis. It utilizes mixed-signal CMOS technology to provide a complete solution for controlling DC brushless motors. The series targets energy-efficient cooling designs in consumer and automotive sectors, offering integrated hall sensing and power drive capabilities in a minimal footprint.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Due to the NRND status, alternative components should be evaluated based on pin compatibility, current ratings, and package dimensions. Review Melexis product selection guides for potential next-generation replacements.