L6285

3 CHANNELS MULTIPOWER SYSTEM

ADVANCE DATA

CHANNEL-A AND CHANNEL-B FOR UNIPO-

LAR STEPPER MOTORS

Ω

Ω

CHANNEL-C FOR DC MOTORS

Ω

Ω

CHOPPING MODE DRIVING FOR C.L. CUR-

RENT CONTROL ON CHA AND CHB AND

O.L. VOLTAGE CONTROL ON CHC.

INTERNAL FOUR DRIVING LATCHES

16 BIT INTERNAL SHIFT REGISTER

DIRECT INTERFACE TO

µP

SERIAL DRIVING SEQUENCE LOADING

CMOS COMPATIBLE INPUTS

PRE-ALARM OUTPUT SIGNAL

THERMAL SHUTDOWN

DESCRIPTION

This Combo Motor Driver uses large scale inte-

gration to incorporate several functions into the

same chip.

1) Two unipolar stepper motor driver

2) A full bridge DC motor driver

3) Serial microprocesor interface

The power output stages are DMOS and the input

can be interfaced to a CMOS Microprocessor

logic.

The phase current in the unipolar stepper motor

windings is controlled by two external sensing re-

sistors in fixed frequency chopping mode. The os-

cillator block provides clocks each other 180

° out

of phase to the two stepper motor driver in order

to avoid symultaneous current peaks.

For the DC motor driver is used a bridge; the

RMS voltage to supply this motor is fixed by a

This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

May 1994

ORDERING NUMBERS:

L6285

L6285S

PLCC44

SDIP42

MULTIPOWER BCD TECHNOLOGY

BLOCK DIAGRAM

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