Overview

The LB1876 is a driver for polygon mirror motors such as used in laser printers and similar equipment. It incorporates all necessary circuitry (speed control + driver) on a single chip. Direct PWM drive enables drive with low power loss.

Features

• 3-phase bipolar drive

• Direct PWM drive technique

• Built-in lower side output diode

• Output current limiter

• Reference clock input circuit (FG frequency equivalent)

• PLL speed control circuit

• Phase lock detector output (with masking function)

• Built-in protection circuitry includes current limiter, restraint protection, overheat protection, low-voltage protection, etc.

• Brake method switching circuit (free-run or reverse torque)

• 5V regulator output

• Power save function