MLX90297KZC-AAF-108-RX

Overview

The MLX90297KZC-AAF-108-RX is a single-chip fan driver from Melexis, designed for driving single-coil DC brushless motors (BLDC). It operates within a supply voltage range of 3.3 V to 18 V and features an output current limit of 800 mA. The device supports PWM input signals for efficient speed control via the output half-bridge driver. It is housed in an SOIC-8 surface-mount package and complies with AEC-Q100 automotive standards. The operating frequency range spans from 100 Hz to 100 kHz.

Feature Summary

• Integrates a voltage regulator, Hall sensor with advanced offset elimination, and power H-bridge on a single chip.
• Enables configurable speed curves through external resistor adjustment for tailored motor performance.
• Provides robust protection including 9 kV HBM ESD tolerance and electrical over-stress resistance.

Applications

• Single-coil DC brushless fan control in consumer electronics
• Automotive cooling system actuator drivers
• Low-noise ventilation applications requiring precise speed regulation

Procurement Notes

Verify the specific suffix 'AAF' against the official datasheet to confirm pinout and functional configuration, as suffixes define hardware variants. Confirm the 'RX' tape-and-reel designation matches your assembly requirements. Check the lifecycle status, as similar MLX90297 variants may be marked NRND; ensure this specific part number is active for new designs before procurement.

Selection Notes

Select this component when a compact, low-BOM solution for single-coil BLDC fans is required. It is suitable for applications needing wide voltage operation (3.3–18 V) and integrated magnetic sensing. Choose this driver if AEC-Q100 qualification is mandatory or if space constraints favor an SOIC-8 package over larger alternatives.

Part Context

This part belongs to the MLX90297 series, a family of intelligent fan drivers by Melexis. These devices utilize mixed-signal CMOS technology to combine sensing and power stages. The series targets both automotive and consumer markets, offering high magnetic sensitivity and simplified PCB layouts compared to discrete solutions.

Replacement Considerations

Consult the official Melexis replacement guide for direct equivalents. Verify that any substitute maintains the same SOIC-8 footprint, 800 mA current limit, and 3.3–18 V operating range. Ensure the replacement also supports the required PWM frequency range and AEC-Q100 compliance if used in automotive contexts.