LB1939T中文资料Motor Driver, Constant Voltage/Current, H-Bridge, 2-Channel数据手册ONSEMI规格书

描述 Description

The LB1939T is abipolar stepping motor driver that features low voltage operation, a low saturation voltage and low power consumption. It operates full/half step drive. It supports constant voltage and constant current drive, can control two iris motors and is optimal for shutter, iris and AF drive in 3V battery operated still digital cameras and other battery operated equipment.

特性 Features

• Low voltage drive
• Low saturation voltage output
• Supports constant voltage and constant current drive
• Built-in reference voltage circuit

应用 Application

• 3V Battery Operated Equipment
• Digital Still Cameras
• Digital Video Cameras

简介

LB1939T属于集成电路（IC）的全半桥驱动器。由ONSEMI制造生产的LB1939T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。