ON Semiconductor LB1868M-TLM-H

Description
The LB1868M is a 2-phase unipolar brushless motor driver. With only a few peripheral parts, lockup protection and automatic recovery can be implemented. The IC can be configured for 12 V or 24 V operation and a wide range of variations, from Low speed to H-High speed and from 60 cm to 120 cm square using the same PCB. This makes it easy to design highly reliable fan motor installations.

Features
Output Protection Zener Diode with Variable Withstand Voltage
Z1, Z2 Pins Open: VOLM = 57 V (24 V Specification)
Z1, Z2 pins shorted: VOLM = 32 V (12 V Specification)
External Zener Diode Connected across Z1 - Vcc Pins: Support for Fans with Large Drive Current
External Resistor Allows Configuration for 12 V or 24 V
Direct Hall Element Connection Possible (Built-in Hall Amplifier with Hysteresis Supports Core without Auxiliary Electrode)
Built-in Output Transistor with 1.0 A Output Current (Strengthened Negative-current Support for Core without Auxiliary Electrode)
Built-in Rotation Detection Function: Low during Rotation and High during Stop
Built-in Lockup Protection with Automatic Recovery
ST Pin for Motor Stop/Drive (for Standby Mode of Copiers etc.)
FG Output Pin for Rotation Detection
BC Pin for Kickback Noise Reduction (with 2 External Capacitors)
Built-in Thermal Shutdown

Applications
Fan motors for copiers, printers, and other office equipment
Fan motors for air conditioners, refrigerators, and other home appliances
Fan motors for industrial equipment