Overview

The LB1823 is a predriver IC developed for driving power brushless motors in office automation applications. A motor driver circuit with the desired output power (current and voltage) can be constructed by attaching either a driver array or discrete components at the output. The LB1823 output supports direct PWM drive and thus allows the implementation of low-loss drive circuits. Additionally, the LB1823 includes several associated circuits, such as a speed control circuit, and FG amplifier, and an integrating amplifier, on chip.

Features

• Direct PWM drive output

• Crystal oscillator circuit

• Speed discriminator plus PLL speed control system

• Lock detector output

• Forward/reverse switching circuit

• Braking circuit (short braking technique)

• Start/stop switching circuit

• Over current limiter circuit (OCL)

• Thermal shutdown circuit (TSD)

• Built-in FG amplifier, integrating amplifier

• Shunt regulator output (7.0 V)