Overview

The LB1857M is a three-phase brushless motor driver IC designed for use as a camcorder capstan or drum motor driver, or as a digital audio tape player/recorder motor driver.

Features

• 120° voltage linear system

• Appropriate for portable applications, since the LB1857M reduces system power requirements by using motor voltage control for speed control.

• Built-in torque ripple compensation circuit

• Small external capacitances due to the adoption of a soft switching technique (chip capacitor).

• Built-in thermal shutdown circuit

• Built-in FG amplifier