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SLA7077M Datasheet Preview

SLA7077M Datasheet

Motor Driver IC

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PRODUCT
DESCRIPTION
Series SLA7070M
Motor Driver ICs
INTRODUCTION
This document describes the function and features of
SLA7070M series, which are unipolar 2-phase stepping motor
driver ICs. This document contains preliminary information on
the products under development. Should you have any ques-
tions, including information on options, contact your nearest
sales or representative office.
Features
n Power supply voltages, VBB: 46 V(max.), 10 to 44 V normal
operating range
n Logic supply voltages, VDD: 3.0 to 5.5 V
n Maximum output currents: 1 A, 1.5 A, 2 A, 3 A
n Built-in sequencer
n Simplified clock-in stepping control
n Both full/half-stepping, and microstepping versions;
microstepping versions (SLA7075M, -76M, -77M, -78M) are
capable of full-, half-, quarter-, eighth-, and sixteenth-step-
ping
n Built-in sense resistor, RSInt (NEW)
n All variants are pin-compatible for enhanced design flexibility
n ZIP type 23-pin molded package (SLA package)
n Self-excitation PWM current control with fixed off-time
For microstepping parts, off-time adjusted automatically by
step reference current ratio (3 levels)
n Built-in synchronous rectifying circuit reduces losses at PWM
off (NEW)
n Synchronous PWM chopping function prevents motor noise
in Hold mode
n Sleep mode for reducing the IC input current in stand-by state
n Built-in protection circuitry against motor coil opens/shorts
option available (NEW, patent pending)
Contents
Introduction
Part Numbers and Options
Specifications
Reference Voltage Setting
Allowable Power Dissipation
Package Outline Drawing, SLA-23 Pin
Functional Block Diagram and Pin Assignments
Application Example for Microstepping Products
Truth Tables
Logic Input Pins
Step Sequencing
Individual Circuit Description
Functional Description
Application Information
Thermal Design Information
Characteristic Data
1
2
3
7
8
9
10
12
13
14
15
21
22
25
30
32
All performance characteristics given are typical values for
circuit or system baseline design only and are at the nominal
operating voltage and an ambient temperature of +25°C, unless
otherwise stated.
Sanken Power Devices
from Allegro MicroSystems




Allegro

SLA7077M Datasheet Preview

SLA7077M Datasheet

Motor Driver IC

No Preview Available !

Series SLA7070M
Motor Driver ICs
PART NUMBERS AND OPTIONS
The following are the product variants and optional features
available in the SLA7070M series.
Not all combinations of standard models and product options are
available in high-volume production quantities. For information
on product availability, and assistance with determining the IC
features that are the best fit for your application, please contact
our sales office or representative.
NOTE
The following abbreviations are used throughout this
document to refer to product variants:
PR – Product with both Protection Circuitry and
built-in RSInt options
R – Product with the built-in RSInt option
Part Number
SLA7070MR
SLA7070MPR
SLA7071MR
SLA7071MPR
SLA7072MR
SLA7072MPR
SLA7073MR
SLA7073MPR
SLA7075MR
SLA7075MPR
SLA7076MR
SLA7076MPR
SLA7077MR
SLA7077MPR
SLA7078MR
SLA7078MPR
Protection
RSInt
Protection Circuitry and RSInt
RSInt
Protection Circuitry and RSInt
RSInt
Protection Circuitry and RSInt
RSInt
Protection Circuitry and RSInt
RSInt
Protection Circuitry and RSInt
RSInt
Protection Circuitry and RSInt
RSInt
Protection Circuitry and RSInt
RSInt
Protection Circuitry and RSInt
Output Current, IOUT
(A)
1
Sequencer
Blanking Time
(µs)
Clock Edge
1.5
Full/half Step
3.2
2
3
Positive
1
1.5
Microstep
1.7
2
3
115 Northeast Cutoff, Box 15036
2 Worcester, Massachusetts 01615-0036
Copyright © 2005 Allegro MicroSystems, Inc.


Part Number SLA7077M
Description Motor Driver IC
Maker Allegro
Total Page 30 Pages
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