LB1821 Datasheet (Sanyo) - Power Brushless Motor Pre-Driver

LB1821, Power Brushless Motor Pre-Driver

Speed Control Circuit This IC implements speed control using the combination of a speed discriminator circuit and a PLL circuit.

The speed discriminator and the PLL circuit output (using a charge pump technique) an error signal once every two FG periods.

As compared to the earlier technique in wh

Ordering number : EN5686 Monolithic Digital IC LB1821M Power Brushless Motor Pre-Driver IC for OA Equipment Overview The LB1821M is a pre-driver IC that supports direct PWM drive and is appropriate for the power brushless motors used in office automation equipment.

A motor drive circuit with the desired output capability (voltage and current characteristics) can be constructed by attaching a driver array at the IC output.

The LB1821M includes on chip a speed control circuit that allows the mo

LB1821 Features

* Direct PWM drive output Speed discriminator + PLL speed control circuit FG and integrating amplifiers Forward/reverse switching circuit Braking circuit (short braking) Speed lock detection output Full complement of on-chip protect