US168ELD-AAA-000-SP

Overview

The US168ELD-AAA-000-SP is a single-chip solution designed for driving single-coil brushless DC (BLDC) fans and motors. It operates within a supply voltage range of 1.8 V to 6.5 V and supports a maximum output current of 350 mA. The device integrates a full bridge driver with soft-switching technology to minimize acoustic noise. It features an integrated Hall effect sensor providing a frequency generator (FG) output for speed monitoring. Protection mechanisms include reverse voltage, locked rotor, and thermal protection.

Feature Summary

• Soft-switching architecture reduces acoustic and motor noise while ensuring smooth operation
• Integrated frequency generator output follows Hall sensor signals for hardware-based speed monitoring
• Comprehensive protection includes reverse voltage, locked rotor, and thermal shutdown capabilities

Applications

• Single-coil BLDC fan drivers in consumer electronics
• Vibration motor drivers in mobile devices requiring ultra-thin designs
• Automotive onboard cooling systems

Procurement Notes

Verify the specific package variant against project requirements, as the US168 series offers multiple options including CSP and QFN. Confirm that the 1.8 V to 6.5 V operating range aligns with the target system power rails. Ensure compatibility with single-coil load configurations and validate that the integrated FG output meets interface specifications for the host controller.

Selection Notes

Select this component when low noise and minimal external component count are critical design constraints. The integrated soft-switching feature distinguishes it from standard linear drivers by reducing electromagnetic interference and audible artifacts. Consider the available package sizes, such as the compact UTQFN, if space optimization is required for portable or densely packed assemblies.

Part Context

This part belongs to the US168 family of single-coil fan drivers manufactured by Melexis. The series focuses on integrating control and power stages into a single IC to simplify board layout. The ELD suffix typically denotes a specific surface-mount package configuration within the broader product line, tailored for automated assembly processes.

Replacement Considerations

Direct substitutes may include other single-coil BLDC drivers from Melexis with similar voltage ranges. Verify pinout compatibility and electrical characteristics before swapping. Alternative packages like SOT-23 or different MLX/US series parts may require schematic adjustments.