MLX90411LLD-BAF-046-RE

Overview

The MLX90411LLD-BAF-046-RE is an automotive-grade, low-noise, fully integrated single-coil fan driver IC manufactured by Melexis Technologies NV. It features a built-in high-sensitivity Hall effect sensor for adaptive commutation and supports output currents up to 800mA. The device operates within a supply voltage range of 3.2V to 32V and is designed for applications requiring robust performance in harsh environments. It includes integrated power clamping options, such as 40V protection, to handle load dump scenarios common in automotive systems. The component is housed in a compact 6-UTDFN (2.5x2mm) surface-mount package with exposed pads, facilitating efficient thermal management and space-constrained PCB layouts.

Feature Summary

• Fully integrated single-coil fan driver with embedded Hall sensor for adaptive commutation
• Automotive-grade reliability with AEC-Q100 qualification and wide operating temperature range
• Integrated power clamping for transient voltage suppression without external components
• Configurable speed control via PWM input with programmable open-loop or closed-loop modes

Applications

• LED headlight cooling fans in automotive lighting systems
• Seat ventilation and heating system blowers
• Sensor cooling fans for electronic control units
• Multimedia GPU cooling fans in infotainment systems

Procurement Notes

Verify the specific suffix BAF against official Melexis documentation to confirm pinout and functional configuration, as ordering codes define exact electrical parameters. Ensure the reel quantity matches production requirements. Confirm RoHS compliance status and moisture sensitivity level prior to soldering. Check for obsolescence notices or recommended replacement parts if the component is marked as not recommended for new designs.

Selection Notes

Select this part for applications requiring low acoustic noise and high efficiency in single-coil fan control. The 40V clamping version is suitable for direct 12V battery connections handling load dumps. Consider the UTDFN package for space-limited designs. Evaluate the need for I2C programmability for dynamic speed control versus fixed configurations. Ensure the thermal dissipation capabilities of the board layout support the 800mA output current under maximum ambient temperatures.

Part Context

The MLX90411 series represents Melexis' solution for intelligent fan and pump driving in automotive and industrial markets. It combines sensing and power stages into a single chip, reducing bill-of-materials complexity. The LLD suffix indicates the 6-UTDFN package variant, while the automotive grade ensures durability under vibration and extreme temperatures typical of vehicle environments.

Replacement Considerations

Check Melexis official substitution lists for equivalent parts with compatible pinouts and electrical characteristics. Verify that any alternative maintains the same voltage rating and current capacity. Ensure the replacement supports the required communication interface if I2C programming is utilized in the design.