US168KLD-AAA-000-SP

Overview

The US168KLD-AAA-000-SP is a single-chip solution designed for driving single-coil brushless DC (BLDC) fans and motors. It operates within a low supply voltage range of 1.8 V to 6.5 V, utilizing soft switching technology to minimize acoustic and motor noise while ensuring smooth operation. The device integrates a full-bridge driver and features high-sensitivity Hall effect sensors for integrated tachometer (FG) output, which follows the Hall sensor signal to determine rotational speed via an open-drain interface. Key protection mechanisms include reverse voltage protection, locked rotor protection, and thermal protection, enhancing robustness for consumer and automotive applications.

Feature Summary

• Soft switching technology reduces acoustic and motor noise for smoother operation
• Integrated full-bridge driver with low supply voltage capability
• High-sensitivity integrated Hall effect sensor for accurate rotation detection
• Comprehensive protection including reverse voltage, locked rotor, and thermal safeguards

Applications

• Low-noise single-coil cooling fans
• Consumer electronic ventilation systems
• Automotive onboard fan control
• Small BLDC motor drives

Procurement Notes

Verify the specific suffix 'KLD' against official Melexis documentation to confirm package type and tape/reel configuration, as suffixes often dictate physical handling and storage requirements. Ensure compatibility with the target application's voltage range and thermal environment before finalizing procurement. Cross-reference the manufacturer part number with authorized distributors to confirm current availability and lead times.

Selection Notes

Select this component for applications requiring minimal external components and low noise levels in single-coil BLDC fan drives. The integrated Hall sensor eliminates the need for external feedback devices, simplifying the PCB layout. Consider the UTDFN-6 or SOT-23 package options based on available board space and thermal dissipation needs. Ensure the system design supports the 1.8V to 6.5V operating range and utilizes the open-drain FG output correctly for speed monitoring.

Part Context

The US168 series from Melexis represents a family of single-chip solutions for single-coil BLDC fan and motor drivers. These ICs are engineered to provide robust performance in compact form factors, suitable for both consumer and automotive markets. The series emphasizes noise reduction through soft switching and integrates essential protection features to ensure reliability in various environmental conditions.

Replacement Considerations

Check Melexis official substitution guides for direct replacements. Generic equivalents may lack the integrated Hall sensor or specific soft-switching characteristics required for low-noise performance. Verify pinout compatibility and electrical parameters if considering alternative manufacturers.