Overview

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 12V or 24V operation and a wide range of variations, from Low speed to H-High speed and from 60cm to 120cm 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 = 57V (24V specification)

Z1, Z2 pins shorted: VOLM = 32V (12V specification)

External Zener diode connected across Z1 - VCC pins:

support for fans with large drive current

● External resistor allows configuration for 12V or 24V

● Direct Hall element connection possible (built-in Hall amplifier

with hysteresis supports core without auxiliary electrode)

● Built-in output transistor with 1.0A 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

LB1868M-W-AH属于集成电路（IC） > 全半桥驱动器。安森美半导体公司制造生产的LB1868M-W-AH全半桥驱动器器件属于电桥驱动器电源管理集成电路 (PMIC) 系列，包含两个或多个功率晶体管，以及在外部器件控制下将其用作开关所需的电路。这些晶体管通常在内部配置为成对串联连接（称为半桥），因而任意指定晶体管对之间的结点都可以连接至两个电源轨中的任一个。这类器件常用于将控制器件（如微控制器）提供的低电平信号转换为操作执行器（如步进电机或无刷电机）所需的较大功率信号。