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DriveMrostor
Data Sheet 28210.04A
SLA7070M, SLA7071M,
SLA7072M, and SLA7073M
Motor Driver IC Family
The SLA7070M, SLA7071M, SLA7072M, and SLA7073M motor driver ICs feature 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 pin-compatibile, 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.
ABSOLUTE MAXIMUM RATINGS AT TA = 25°C
Load (Motor) Supply Voltage, VM .........46 V Main Power Supply Voltage, VBB..........46 V Logic Supply Voltage, VDD ...........................7 V Output Current, IOUT
SLA7070M .................................1.0 A SLA7071M .................................1.5 A SLA7072M .................................2.0 A SLA7073M .................................3.0 A Logic Input Voltage, VIN .............................. –0.3 to VDD+0.3 V REF Input Voltage, VREF ............................................–0.3 to VDD+0.3 V Sense Voltage, VSInt tw < 1 μs is not considered.......... ±2 V Power Dissipation, PD Without heat sink ...................... 4.7 W Junction Temperature, TJ.......................150°C Ambient Temperature, TA....... –20 to 85°C Storage Temperature, Tstg ... –30 to 150°C
FEATURES AND BENEFITS
Features Power supply voltages, VBB: 46 V(max.), 10 to 44 V normal operating range 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 Both full/half-stepping Built-in sense resistor, RSInt 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 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
Sanken Power Devices from Allegro MicroSystems
DriveMrostor
SLA7070M, SLA7071M, SLA7072M, and SLA7073M 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.
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
Protection
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
Positive
2
3
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Copyright © 2005 Allegro MicroSystems, Inc.
DriveMrostor
SLA7070M, SLA7071M, SLA7072M, and SLA7073M
Motor Driver ICs
FUNCTIONAL BLOCK DIAGRAM AND PIN ASSIGNMENTS
OutB OutB OutB OutB
VBB
Reset Clock
F/R M3 M2 M1 N.C. Flag
Ref/Sleep1
VDD
OutA OutA OutA OutA
1234
14 13
18 6 7 8 9 16 10 15
11
20 21 22 23
MIC
PreDriver
Protect
Sequencer &
Sleep Circuit
Reg.
PreDriver
Protect
SenseA 5 RSInt
DAC
+ Comp -
OSC
PWM Control
Synchro Control
DAC
PWM Control
+ Comp
-
OSC
RSInt
19 SenseB
17 12
Sync Gnd
For R products, protection circuits not built-in. FLAG pin is not connected internally.
Pin No. Symbol
Functions
Pin No.
1
OutA
Output of phase A
2
13 14
3
OutA
Output of phase A¯
4
15 16
5 SenseA Phase A current sensing
17
6 NC No internal connection
18
7 M1
19
8 M2 Commutation and Sleep2 setting
20
9 M3
21
10
Clock
Step clock input
22
11
VBB
Main power supply (for motor)
12
GND
Ground
23
*Flag pin active on PR products only; not internally connected for R products.
Symbol Ref / Sleep1
VDD Reset F/R Sync Flag* SenseB
OutB
OutB
Functions Input for control current and Sleep 1 setting Power supply to logic Reset for internal logic Forw.