ALLEGRO SLA7075M, SLA7076M, SLA7077M, SLA7078M DATA SHEET

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Motor

Drivers

SLA7075M, SLA7076M, SLA7077M, and SLA7078M

Motor Driver IC Family

The SLA7075M, SLA7076M, SLA7077M, and SLA7078M motor driver ICs feature 2-phase stepper unipolar drivers. The clock-in type input interface allows simplified control logic, and options for built-in sense current detection and load circuit short or open protection (patent pending) provide lower loss, and lower thermal resistance. All products in the SLA7070M series are pincompatibile, supporting rapid design of application variants.

The built-in excitation distribution circuit (sequencer) allows motor control using only the CLOCK signal for simple operations (rotate/stop), with motor speed control by frequency input into CLOCK pin. This eliminates logic signal lines required for conventional phase-input methods, and reduces demand on heavily-used CPUs.

Contact Allegro® for application information and additional information on device performance and logic.

Data Sheet

28210.05

ABSOLUTE MAXIMUM RATINGS

AT TA = 25°C

Load (Motor) Supply Voltage, V Main Power Supply Voltage, V Logic Supply Voltage, V Output Current, I

SLA7075M ................................. 1.0 A

SLA7076M ................................. 1.5 A

SLA7077M ................................. 2.0 A

SLA7078M ................................. 3.0 A

Logic Input Voltage, V

.............................. –0.3 to VDD+0.3 V

REF Input Voltage, V

............................................

Sense Voltage, V

tw < 1 μs is not considered..........±2 V

Power Dissipation, P

Without heat sink ......................4.7 W

Junction Temperature, T

Ambient Temperature, TA.......–20 to 85°C

Storage Temperature, T

OUT

DD ...........................

REF

–0.3 to VDD+0.3 V

SInt

J.......................

...–30 to 150°C

stg

M .........

BB..........

46 V 46 V

7 V

150°C

FEATURES AND BENEFITS

Features

 Power supply voltages, V

 Logic supply voltages, VDD: 3.0 to 5.5 V

 Maximum output currents: 1 A, 1.5 A, 2 A, 3 A

 Built-in sequencer

 Simplified clock-in stepping control

 Microstepping at full-, half-, quarter-, eighth-, and sixteenth-steps

 Built-in sense resistor, R

 All variants are pin-compatible for enhanced design flexibility

 ZIP type 23-pin molded package (SLA package)

 Self-excitation PWM current control with fixed off-time; off-time adjusted

automatically by step reference current ratio (3 levels)

 Built-in synchronous rectifying circuit reduces losses at PWM off

 Synchronous PWM chopping function prevents motor noise in Hold mode

 Sleep mode for reducing the IC input current in stand-by state

 Built-in protection circuitry against motor coil opens/shorts option available

: 46 V(max.), 10 to 44 V normal operating range

SInt

Sanken Power Devices

from Allegro MicroSystems

SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs

PART NUMBERS AND OPTIONS

The following are the product variants and optional features

available for these variants of 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.

Part Number Protection

SLA7075MR R

SLA7075MPR Protection Circuitry and R

SLA7076MR R

SLA7076MPR Protection Circuitry and R

SLA7077MR R

SLA7077MPR Protection Circuitry and R

SLA7078MR R

SLA7078MPR Protection Circuitry and R

SInt

Output Current, I

NOTE The following abbreviations are used throughout this document to refer to product variants: PR – Product with both Protection Circuitry and built-in R R – Product with the built-in R

OUT

(A)

1.5

Sequencer

Microstep 1.7 Positive

options

SInt

Blanking Time

(μs)

SInt

option

Motor

Drivers

Clock Edge

115 Northeast Cutoff, Box 15036

SLA7075M, SLA7076M,

Motor

Drivers

SLA7077M, and SLA7078M

FUNCTIONAL BLOCK DIAGRAM AND PIN ASSIGNMENTS

Ref/Sleep1

Reset

OutA

1234

MIC

RSInt RSInt

VDD

1314 1516

Pre-

Driver

Protect Protect

DAC

Comp

OSC

PWM

Control

Flag

M1M2M3

6789 10 11

Sequencer

Sleep Circuit

Synchro

Control

F/R

Clock

PWM

Control

DAC

VBB

Reg.

Pre-

Driver

Comp

OSC

OutB

20 21 22 23

Motor Driver ICs

OutB

SenseBSenseA

GndSync

For R products, protection circuits not built-in. FLAG pin is not connected internally.

Pin No. Symbol Functions Pin No. Symbol Functions

2 14 VDD Power supply to logic

4 16 F / R Forward / reverse switch input

5 SenseA Phase A current sensing 17 Sync Synchronous PWM control switch input

6Mo

7M1

8M2 20

9M3 21

10 Clock Step clock input 22

12 GND Ground

*Flag pin active on PR products only; not internally connected for R products.

OutA Output of phase A

OutA Output of phase A¯

Output from monitor of 2-phase excitation status

Commutation and Sleep2 setting

13 Ref / Sleep1 Input for control current and Sleep1 setting

15 Reset Reset for internal logic

18 Flag* Output from protection circuits monitor

19 SenseB Phase B current sensing

OutB Output of phase B¯

OutB Output of phase B11 VBB Main power supply (for motor)

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SLA7075M, SLA7076M, SLA7077M, and SLA7078M Motor Driver ICs

Motor

Drivers

ELECTRICAL CHARACTERISTICS, valid at TA = 25°C, VBB = 24 V, VDD = 5 V, applicable to both PR and R products, unless otherwise specified

Characteristics Symbol Test Conditions Min. Typ. Max. Units

Normal mode – – 15 mA

BBS

DSS

clk

REF

REFS

REF

SInt

con

coff

Sleep1 and Sleep2 modes – – 100 μA

––5mA

VBB = 44 V, IDS = 1 mA – – – V

Clock Duty Cycle = 50% 250 – – kHz

See pages 6 and 7 – – – V

Output OFF, Sleep1 mode, I sequencer = enable

= 0.1 V to 0.5 V, Step reference current

REF

ratio: 100%

= 2.0 V → 1.5 V 100 – – μs

REF

Clock → Output ON – 2.0 – μs

Clock → Output OFF – 1.5 – μs

in specification,

BBS

– – 0.25 × V

0.75 × V

–±1–μA

2.0 – V

– ±10 – μA

– 0.03 V

REF

––V

REF

+ 0.03 V

Main Power Supply Current

Logic Power Current I

MOSFET Breakdown Voltage V

Maximum Response Frequency f

Logic Supply Voltage

Logic Supply Current

REF Input Voltage

REF Input Current I

SENSE Voltage V

Sleep-Enable Recovery Time t

Switching Time

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036

SLA7075M, SLA7076M,

Motor

Drivers

SLA7077M, and SLA7078M

Motor Driver ICs

STEPPING CHARACTERISTICS, applicable to both PR and R products; representative values from SLA7070M series shown Valid at TA = 25°C, VBB = 24 V, VDD = 5 V, unless otherwise specified

Characteristics Symbol Test Conditions Min. Typ. Max. Units

Step Reference Current Ratio

Mo (Load) Output Voltage

Mo (Load) Output Current

PWM Minimum On-Time t

PWM Off-Time

Mode F

Mode E – 98.1 – %

Mode D – 95.7 – %

Mode C – 92.4 – %

Mode B – 88.2 – %

Mode A – 83.1 – %

Mode 9 – 77.3 – %

Mode 8 – 70.7 – %

Mode 7 – 63.4 – %

Mode 6 – 55.5 – %

Mode 5 – 47.1 – %

Mode 4 – 38.2 – %

Mode 3 – 29 – %

Mode 2 – 19.5 – %

Mode 1 – 9.8 – %

on(min)

≈ V

REF

MOLIMOL

MOHIMOH

MOL

MOH

Mode 8 to Mode F – 12 – μs

off1

Mode 4 to Mode 7 – 9 – μs

off2

Mode 1 to Mode 3 – 7 – μs

off3

= 100 %, V

SInt

= 1.25 mA – – 1.25 V

= –1.25 mA V

= 0.1 to 0.5 V

REF

– 100 – %

– 1.25 – – V

– – 1.25 mA

–1.25 – – mA

– 1.7 – μs

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