LB1860M-TLM-H

Overview

The LB1860M-TLM-H is a two-phase half-wave variable speed fan motor driver designed for DC brushless fan motors. It integrates driving, lock protection, restart, and speed control functions within a single chip. The device supports operation from either 12 V or 24 V power supplies via an external resistor configuration, providing strong protection against power supply surges. Output transistors deliver an output current of 1.5 A with built-in Zener diodes for low-level noise protection. Key features include a built-in thermal shutdown circuit, a rotation detect function, and a two-speed mode select function requiring minimal external components.

Feature Summary

• Integrates two-speed mode select function for full speed and low speed operation or thermistor-controlled continuous variable speed based on ambient temperatures.
• Includes built-in motor lock protection and automatic return circuit to ensure reliable operation under fault conditions.
• Features output transistors with 1.5 A current capability and integrated Zener diodes for enhanced noise protection.
• Provides built-in thermal shutdown circuit and rotation detection functionality for comprehensive system monitoring.

Applications

• DC brushless fan motor control in consumer electronics
• Variable speed cooling systems regulated by ambient temperature
• Industrial equipment requiring robust motor lock protection

Procurement Notes

Verify the specific package type and lead times with authorized distributors, as availability may vary. Confirm that the external resistor configuration matches the required 12 V or 24 V supply voltage for your application. Ensure compatibility with Hall element connections if rotation detection is utilized. Check for any end-of-life notifications or discontinuance updates from the manufacturer before finalizing procurement plans.

Selection Notes

Select this component when a compact solution for two-phase half-wave DC brushless fan motors is required. It is suitable for applications needing both high current drive (1.5 A) and integrated protection features like thermal shutdown and lock detection. Consider the external resistor requirement for voltage selection and the need for minimal external components for speed control modes.

Part Context

The LB1860M-TLM-H belongs to the LB1860 series of motor drivers manufactured by Sanyo Semicon Device. This series is specifically engineered for driving two-phase unipolar DC brushless fan motors. The 'TLM' suffix typically indicates a tape and reel packaging format, while 'H' often denotes a specific environmental compliance or variant status. The series emphasizes reliability through integrated protection circuits and flexible speed control options.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Direct replacements should be sought from official distributor channels or equivalent series components with matching electrical characteristics and pin configurations.