MLX90297LLW-AAF-108-RE

Overview

The MLX90297LLW-AAF-108-RE is a single-chip fan driver designed for driving single-coil DC brushless motors (BLDC). It utilizes mixed-signal CMOS technology to integrate a voltage regulator, Hall sensor with offset elimination, and a power output H-bridge. The device controls motor speed via PWM input signals applied to the half-bridge driver. A key characteristic is its configurable speed curve, which is adjusted using external resistors. It operates within a wide supply voltage range of 3.3 V to 18 V and complies with AEC-Q100 standards.

Feature Summary

• Integrates voltage regulator, Hall sensor, and H-bridge in a single package for low BOM cost
• Enables efficient speed control through PWM input signal modulation
• Allows customizable speed profiles via external resistor configuration
• Features high magnetic sensitivity and robust ESD protection

Applications

• Single-coil DC brushless motor drives in automotive systems
• Consumer appliance cooling fans requiring configurable speed curves
• Industrial electronic equipment thermal management solutions

Procurement Notes

Verify the specific suffix 'AAF-108-RE' against official Melexis documentation to confirm exact trimming options and tape-and-reel packaging specifications. Ensure compatibility with the target BLDC motor's electrical parameters before integration. Cross-reference the AEC-Q100 qualification status for automotive-grade reliability requirements. Confirm that the required speed curve configuration aligns with the available external resistor values supported by this variant.

Selection Notes

Select this component when a compact, single-layer PCB solution is required for single-coil BLDC applications. It is suitable for designs needing flexible speed profiling without complex digital interfaces. Consider the 3.3 V to 18 V operating range for system power architecture compatibility. Evaluate the need for integrated offset elimination and high ESD immunity for harsh environment operation.

Part Context

The MLX90297 belongs to Melexis’ family of intelligent fan and pump driver ICs. These devices are engineered to optimize cost, size, and acoustic performance for automotive and consumer markets. The series leverages advanced state machine control to ensure reliable operation while minimizing external component count. This specific model targets applications demanding high integration and configurable performance characteristics.

Replacement Considerations

Consult official Melexis substitution guides for verified alternatives. Generic cross-references may not match the specific configurable speed curve capabilities or AEC-Q100 compliance of the MLX90297LLW-AAF-108-RE. Verify pinout and functional equivalence carefully before replacement.

FAQ

How is the speed curve configured?

The speed curve is configured by adjusting external resistors connected to the device.

What type of motor does this driver support?

It is designed specifically for driving single-coil DC brushless motors (BLDC).