LB1861M-W-AH

Overview

The LB1861M-W-AH is a two-phase half-wave variable speed fan motor driver manufactured by onsemi. It is designed to control brushless DC motors commonly found in cooling applications. The device integrates drive circuitry for two phases, enabling efficient operation of fan motors with variable speed capabilities.

Feature Summary

• Supports two-speed mode selection requiring minimal external components
• Enables thermistor-controlled continuous speed adjustment
• Integrates drive functions for two-phase half-wave motor configurations

Applications

• Variable speed fan motor control
• Cooling systems for electronic equipment
• Brushless DC motor drives

Procurement Notes

Verify the specific suffix (W-AH) against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with the target motor's voltage and current requirements before procurement. Cross-reference the part number with authorized distributors to confirm availability and authenticity.

Selection Notes

Select this component when designing circuits for two-phase half-wave brushless DC fans requiring integrated drive solutions. Consider its capability for thermistor-based thermal management and simple two-speed switching. Evaluate power dissipation and thermal performance relative to the specific fan load and enclosure constraints.

Part Context

This part belongs to onsemi's standard product lineup, which includes motor drivers and controllers. It is distinct from the EliteSiC family mentioned in other contexts, focusing instead on low-voltage motor control applications rather than high-power silicon carbide solutions.

Replacement Considerations

Check for direct pin-to-pin replacements within the LB1860/LB1861 series or equivalent two-phase fan driver ICs from other manufacturers. Verify that any substitute matches the operating voltage range and current handling capabilities of the original design.