MLX90297KLW-AAF-109-SP

Overview

The MLX90297KLW-AAF-109-SP is a single-chip fan driver designed for driving single-coil brushless DC (BLDC) motors. It integrates a voltage regulator, a Hall sensor with an advanced offset elimination system, and a power output H-bridge, all controlled by a digital state machine. The device supports a wide supply voltage range from 3.3 V to 18 V and delivers an output current of 960 mA. It features AEC-Q100 qualification and 9 kV HBM ESD protection.

Feature Summary

• Integrates a single-coil fan driver in a compact DFN-WF-10 package to reduce BOM cost and PCB size
• Enables efficient motor speed control via PWM input signals applied to the output half-bridge driver
• Allows configurable speed curves through adjustment of external resistors
• Ensures reliable operation with high magnetic sensitivity and robust electrostatic discharge protection

Applications

• Consumer electronics cooling systems
• Single-coil BLDC motor drives
• Automotive applications requiring AEC-Q100 qualified components

Procurement Notes

Verify the specific suffix 'AAF' against the official Melexis datasheet to confirm pinout and functional configuration differences compared to other variants like 'ABF'. Confirm the 'NRND' status if applicable to your design lifecycle requirements. Ensure the DFN-WF-10 package dimensions match your PCB footprint constraints. Validate that the 960 mA output current meets your motor's peak demand under worst-case thermal conditions.

Selection Notes

Select this component when a highly integrated solution for single-coil fans is required to minimize board space. It is suitable for designs needing a wide operating voltage range up to 18 V. Consider this part for applications where configurable speed curves are necessary without complex digital interfaces. Ensure the application environment does not exceed the specified ESD protection levels or temperature ranges defined in the datasheet.

Part Context

This part belongs to the Melexis MLX90297 family of single-chip fan drivers. These devices utilize mixed-signal CMOS technology to combine magnetic sensing and power drive functions. The family targets cost-sensitive and space-constrained applications, offering a complete solution for controlling single-coil BLDC motors with minimal external components.

Replacement Considerations

Check for direct cross-references in Melexis documentation. Verify compatibility with existing PCB footprints and control signal timings. Ensure substitute parts support the same 3.3 V to 18 V input range and 960 mA output capability.