LB11868V-W-AH

Overview

The LB11868V-W-AH is a single-phase full-wave pre-driver for fan motors, manufactured by onsemi. It features variable speed control compatible with external PWM signals. The device supports an output voltage of 18 V and has a power dissipation rating of 800 mW. Designed to operate with minimal external components, it enables efficient, low-noise, and low-power speed regulation for brushed DC fan motors.

Feature Summary

• Single-phase full-wave pre-driver architecture for fan motor applications
• Variable speed functionality compatible with external PWM signals
• Optimized for low noise and low power consumption operation

Applications

• Brushed DC fan motor speed control
• Low-noise cooling system drives
• Low-power ventilation units

Procurement Notes

Verify the component status as obsolete before integration into new designs. Confirm that the 18 V output voltage and 800 mW power dissipation limits align with the target thermal and electrical requirements. Ensure compatibility with the required external PWM signal levels and timing specifications for proper variable speed operation.

Selection Notes

Select this pre-driver when designing single-phase brushed DC fan systems requiring PWM-based speed regulation. It is suitable for applications prioritizing low acoustic noise and reduced power consumption. Consider the need for external power stages if current demands exceed the pre-driver's internal capabilities.

Part Context

This component belongs to the LB11868 series of motor drivers from onsemi. It serves as a pre-driver stage, typically interfacing with external power switches to drive fan motors. The series focuses on providing efficient control solutions for small-scale motor applications in consumer and industrial electronics.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the status is listed as obsolete, alternative sourcing or redesign may be necessary.