US168KLD-AAA-000-RE

Overview

The Melexis US168KLD-AAA-000-RE 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 utilizes soft-switching technology to minimize acoustic and motor noise while ensuring smooth operation. The device integrates reverse voltage protection, locked rotor protection, and thermal protection for high robustness in consumer and automotive applications. It features an integrated Hall-effect tachometer output that follows the sensor signal to determine rotational speed, providing an open-drain output suitable for external hardware monitoring.

Feature Summary

• Soft-switching architecture reduces acoustic and motor noise for smoother operation
• Integrated Hall-effect tachometer provides open-drain speed feedback
• Comprehensive protection mechanisms including reverse voltage, locked rotor, and thermal safeguards

Applications

• Low-noise single-coil cooling fans
• Consumer electronic ventilation systems
• Automotive onboard fan control modules

Procurement Notes

Verify the specific suffix KLD against official Melexis documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with the target PCB footprint and reflow profile requirements. Confirm availability status directly with authorized distributors as inventory levels fluctuate. Validate RoHS compliance and environmental declarations prior to integration into final assemblies.

Selection Notes

Select this component when low noise and compact size are critical for single-coil BLDC fan applications. It is suitable for designs requiring integrated speed sensing without external components. Consider the UTDFN-6 package for space-constrained layouts. Evaluate the 1.8 V to 6.5 V operating range against system power rails. Compare against other US168 variants if different packaging or pin configurations are required.

Part Context

This part belongs to the US168 series from Melexis, which specializes in single-chip solutions for single-coil BLDC fans. The series emphasizes noise reduction through soft-switching techniques. It targets both consumer electronics and automotive markets where reliability and quiet operation are paramount. The family includes various packages such as SOT-23, CSP, and QFN to accommodate different design constraints.

Replacement Considerations

Consult official Melexis substitution guides for verified alternatives. Cross-reference electrical parameters and pinouts before considering any generic replacements.