© Semiconductor Components Industries, LLC, 2015

1

Publication Order Number:

December 2015- Rev. P0

LC898240/D

LC898240

Advance Information

Smooth Stepper Motor Controller

Overview

The LC898240 is a current controller IC for a stepper motor, co-working

with a conventional driver. It provides additional functions to a stepper

motor control system. The drive current of a motor coil is adopted for the

motor load, so that minimize the waste of power. By this current control, the

stepper motor moves smoothly.

And, it gives higher efficiency power

consumption, lower acoustic noise, lower vibration and lower heat

generation, by the smooth motion.

The LC898240 also provides speed acceleration profile control function and

step-out detection/prevention. These functions can be configured by the

registers through an SPI serial port interface flexibly. The preset parameters

and configuration can be stored to the companion non-volatile memory.

The LC898240 consists of the monitor inputs from motor terminal, serial

port inter face, the step control signal inputs from a microprocessor and the

outputs to a stepper motor driver. The topology of a microprocessor, a

stepper motor driver and LC898240, can be arranged to match various

drivers and system architecture.

Thus, it can be used as an interface

converter between a microprocessor and a driver with the advanced control

functions.

Features

•

Unipolar and bipolar motor applicable

•

Supported excitation mode:

o

Half step

o

Quarter step

o

1/8 step

o

1/16 step

o

Full step (smooth stepper not applicable)

•

SPI interface for the motor control and setting

•

Interface for the driver control

•

Non-volatile memory (E2PROM)

o

Setting of the controller

o

Acceleration curve: 9 curves, 440 steps for each

Recommended Stepper Motor Driver

Typical Applications

www.onsemi.com

PACKAGE PICTURE

SQFP48

0.5mm pitch

MARKING DIAGRAM

ORDERING INFORMATION

Ordering Code:

LC898240-2H (tray)

LC898240-WH (reel)

Package

SQFP48

(Pb-Free / Halogen Free)

Shipping (Qty / packing)

1250 / Tray

1000 / Tape & Reel

1

898240

13T

YMMXXX

Y: Year

MM: Month

XXX: ID

This document contains information on a new product. Specifications and information

herein are subject to change without notice.

orientation and tape sizes, please refer to our Tape and Reel

Packaging Specifications Brochure, BRD8011/D.

http://www.onsemi.com/pub_link/Collateral/BRD8011-D.PDF