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SLA7080M Series
Unipolar 2-Phase Stepping Motor Driver ICs
Features and Benefits
Power supply voltage, VBB, 46 V maximum; 10 to 44 V
normal operating range
Logic supply voltage, VDD, 3 to 5.5 V
Four output currents, IO(max) , options: 1, 1.5, 2, and 3 A
Stepping control for phase input (full or half step)
Built-in sense resistor detects motor current
Compact ZIP 23-pin molded package (SLA package)
Self-excitation PWM control with fixed off-time
Built-in synchronous rectifying circuit reduces losses at
PWM-off
Synchronous PWM function prevents noise generation in
motor Hold mode
Sleep function reduces power consumption of drivers in
Standby mode
Protection circuit detects motor coil open/short and
prevents overheating due to avalanche breakdown
Externally-adjustable (3.2 μs /5.2 μs) blanking time
(minimum on-time)
Package: 23-pin ZIP (type SLA)
Description
This document describes the function and features of SLA7080M
series, which are unipolar 2-phase stepping motor driver ICs.
Four levels of output current are available from the incorporated
MOSFETs, corresponding to the rated output current ratings.
All current ratings are available with protection against motor
coil shorts or motor open wire detection.
The SLA7080M series has a multichip structure, for enhanced
thermal dispersion.The Control IC (MIC), four power elements
(MOSFET), and dual sense resistors, are all separate ICs.
Built-in sense resistors for each phase allow accurate track-
ing of performance without additional external components.
Low-power sleep mode as well as reduced power during PWM
off-time maximize energy savings.
Not to scale
Functional Block Diagram
28610.23
SENSEA
Rs
MIC
Pre-
Driver
Protect
Logic Block
Reg.
Pre-
Driver
Protect
+
C- omp
OSC
PWM
Control
Synchro
Control
PWM
Control
+
Com-p
OSC
SYNC GND
SENSEB
Rs

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SLA7080Mwww.DataSheet4U.com
Series
Unipolar 2-Phase Stepping Motor Driver ICs
Selection Guide
Part Number
SLA7080MPR
SLA7081MPR
SLA7082MPR
SLA7083MPR
Output Current
(A)
1
1.5
2
3
Built-In Sense
Resistor
Packing
Yes 18 pieces per tube
Absolute Maximum Ratings, valid at TA = 25°C
Characteristic
Symbol
Motor Supply Voltage
Main Supply Voltage
Logic Supply Voltage
VM
VBB
VDD
SLA7080MPR
Output Current
SLA7081MPR
IO SLA7082MPR
SLA7083MPR
Logic Input Voltage
REF Input Voltage
Allowable Power Dissipation
Maximum Junction Temperature
Nominal Operating Temperature
Storage Temperature
VIN
VREF
PD
TJ(max)
TA
Tstg
No heatsink
Notes
Rating
46
46
6
1.0
1.5
2.0
3.0
–0.3 to VDD + 0.3
–0.3 to VDD + 0.3
4.7
150
–20 to 85
–30 to 150
Unit
V
V
V
A
A
A
A
V
V
W
ºC
ºC
ºC
Recommended Operating Range
Characteristic
Motor Supply Voltage
Main Supply Voltage
Logic Supply Voltage
Symbol
VM
VBB
VDD
Case Temperature
TC
Notes
VDD surge voltage = ± 0.5 V
Without heatsink
With heatsink
On pin 12, adjacent
to case
Min Max Unit
– 44 V
10 44
V
3.0 5.5
V
– 90 ºC
– 80 ºC
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, TA, of 25°C, unless otherwise stated.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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Series
Unipolar 2-Phase Stepping Motor Driver ICs
ELECTRICAL CHARACTERISTICS valid at TA = 25°C, VBB = 24 V and VDD = 5 V, unless otherwise noted
Characteristics
Symbol
Conditions
Min
Main Supply Current
Logic Supply Current
IBB In operation
IBBS Sleep state
IDD
SLA7080MPR
Output MOSFET On-Resistance
RDS(on)
SLA7081MPR
SLA7082MPR
SLA7083MPR
SLA7080MPR
Output MOSFET Diode Forward
Voltage
SLA7081MPR
VF SLA7082MPR
SLA7083MPR
Output MOSFET Breakdown Voltage
Maximum Response Frequency
VDSS
fclk
VBB = 44 V, ID = 1 mA
Clock duty cycle = 50%
100
250
Logic Input Voltage
Logic Input Current
REF Input Voltage
REF Input Current
SENSE Detect Voltage
Sense Resistor1
PWM Minimum On-Time (Blanking
Time)
PWM Off-Time
Sleep Enable Recovery Time
Switching Time
VIL
VIH
IIL
IIH
VREF
VREFS
IREF
VSENSE
Rs
ton(min)
toff
tSE
tdon
tdoff
SLA7080MPR
SLA7081MPR, SLA7083MPR
SLA7082MPR
Sleep state (output off)
SLA7080MPR, SLA7081MPR
SLA7082MPR
SLA7083MPR
B_SEL = low
B_SEL = high
Sleep state
Phase INx Phase OUTx on
Phase INx Phase OUTx off
VDD ×
0.75
0.04
0.04
0.04
2.0
VREF
0.03
0.296
0.199
0.150
100
Typ
0.7
0.45
0.25
0.18
0.85
1.0
0.95
0.95
±1
±1
±10
VREF
0.305
0.205
0.155
3.2
5.2
13
1.5
1.0
Max
15
100
5
0.85
0.6
0.4
0.24
1.1
1.25
1.2
2.1
VDD ×
0.25
0.3
0.45
0.4
VDD
VREF +
0.03
0.314
0.211
0.160
Units
mA
μA
mA
Ω
Ω
Ω
Ω
V
V
V
V
V
kHz
V
V
μA
μA
V
V
V
V
μA
V
Ω
Ω
Ω
μs
μs
μs
μs
μs
μs
Continued on the next page…
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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Series
Unipolar 2-Phase Stepping Motor Driver ICs
ELECTRICAL CHARACTERISTICS (continued) valid at TA = 25°C, VBB = 24 V and VDD = 5 V, unless otherwise noted
Characteristics
Symbol
Conditions
Min Typ Max
Protection Functions2
Overcurrent Detect Voltage
Overcurrent Detect Current
(VOCP / RS)
VOCP
IOCP
At motor coil short circuit
SLA7080MPR, SLA7081MPR
SLA7082MPR
SLA7083MPR
0.65 0.7 0.75
– 2.3 –
– 3.5 –
– 4.5 –
Delay to Open Load Detect
tOPP
1.5 2.0 2.5
Overtemperature Protection Threshold
Temperature
TTSD
Measured at back surface of device case; device operating
such that self-generated heat has permeated detection circuits
on MIC; see Thermal Design section
140
FLAG Output Voltage
VFLAGL
VFLAGH
IFLAGL = 1.25 mA
IFLAGH = –1.25 mA
VDD
1.25
1.25
FLAG Output Current
IFLAGL
IFLAGH
1External sense resistor value approximately 5 mΩ in addition to value of built-in resistor.
2Protection circuit operates when VSENSE VOCP.
–1.25
1.25
Units
V
A
A
A
μs
°C
V
V
mA
mA
Power Derating Chart
5
RθJA = 26.6°C/W
4
3
2
1
0
0 10 20 30 40 50 60 70 80 90
Ambient Temperature, TA (°C)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
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SLA7080Mwww.DataSheet4U.com
Series
Unipolar 2-Phase Stepping Motor Driver ICs
1.4
1.2
SLA7080MPR
MOSFET VDS(on)
vs. Case
Temperature
1.0
0.8
0.6
0.4
0.2
0
–25
1.4
1.2
SLA7082MPR
MOSFET VDS(on)
vs. Case
Temperature
1.0
0.8
0.6
0.4
0.2
0
–25
1.1
Performance Characteristics at TA = 25°C
1.4
1.2
IO = 1 A
IO = 0.5 A
SLA7081MPR
MOSFET VDS(on)
vs. Case
Temperature
1.0
0.8
0.6
0.4
0.2
0 25 50 75 100 125
TC (°C)
0
–25 0
1.4
1.2
IO = 2 A
SLA7083MPR
MOSFET VDS(on)
vs. Case
Temperature
1.0
0.8
0.6
0.4
IO = 1 A
0 25 50 75 100 125
TC (°C)
0.2
0
–25
1.1
0
IO = 1.5 A
IO = 1 A
25 50 75 100 125
TC (°C)
IO = 3 A
IO = 2 A
IO = 1 A
25 50 75 100 125
TC (°C)
SLA7080MPR
MOSFET
Body Diode
Vf vs. Case
Temperature
1.0
0.9
0.8
0.7
IO = 1 A
IO = 0.5 A
SLA7081MPR
MOSFET
Body Diode
Vf vs. Case
Temperature
1.0
0.9
0.8
0.7
IO = 1.5 A
IO = 1 A
0.6
–25
1.1
0
25 50 75 100 125
TC (°C)
SLA7082MPR
MOSFET
Body Diode
Vf vs. Case
Temperature
1.0
0.9
0.8
0.7
IO = 2 A
IO = 1 A
SLA7083MPR
MOSFET
Body Diode
Vf vs. Case
Temperature
0.6
–25
1.1
0
1.0
0.9
0.8
0.7
25 50 75 100 125
TC (°C)
IO = 3 A
IO = 2 A
IO = 1 A
0.6
–25
0
25 50 75 100 125
TC (°C)
0.6
–25
0
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
25 50 75 100 125
TC (°C)
5