1-2-1 2-Phase Stepper Motor Unipolar Driver ICs
SLA7070MR, MPR, MPRT/7071MR, MPR, MPRT/7072MR, MPR, MPRT/7073MR, MPR, MPRT
2-Phase/1-2 Phase Excitation Support, Built-in Sequencer
■Features
• Lineup of built-in current sense resistor and
built-in protection circuit-type
• Power supply voltages, V
BB
: 46 V (max), 10 to
44 V normal operating range
• Logic supply voltages, V
DD
: 3.0 to 5.5 V
• Maximum output currents: 1 A, 1.5 A, 2 A, and
3A
• Built-in sequencer
• Self-excitation PWM current control with fixed
off-time
• Synchronous PWM chopping function
prevents motor noise in Hold mode
• Sleep mode for reducing the IC input current
in stand-by state
• ZIP type 23-pin molded package (SLA
package)
■Absolute
Maximum Ratings
Parameter
Motor Supply Voltage
Driver Supply Voltage
Logic Supply Voltage
Output Current
Logic Input Voltage
REF Input Voltage
Sense Voltage
Power Dissipation
Junction Temperature
Operating Ambient Temperature
Storage Temperature
Symbol
Ratings
Unit
Remarks
V
M
V
BB
V
DD
Io
V
IN
V
REF
V
RS
PD
T
j
T
a
T
stg
46
46
6
*1
–0.3 to V
DD
+0.3
–0.3 to V
DD
+0.3
±2
4.7
17
+150
–20 to +85
–30 to +150
V
V
V
A
V
V
V
W
°C
°C
°C
Mode F
Excluding tw<1µs
When T
a
= 25°C
When T
c
= 25°C
*1: Output current value may be limited for the SLA7070MR, MPR, MPRT (1.0 A), SLA7071MR, MPR, MPRT (1.5 A),
SLA7072MR, MPR, MPRT (2.0 A), and SA7073MR, MPR, MPRT (3.0 A), depending on the duty ratio, ambient
temperature, and heating conditions.
Be sure that junction temperature of T
j
is not exceeded under any circumstances.
■Recommended
Operating Conditions
Parameter
Motor Supply Voltage
Driver Supply Voltage
Logic Supply Voltage
Case Temperature
Symbol
V
M
V
BB
V
DD
T
C
10
3.0
Rating
min.
max.
44
44
5.5
90
Unit
V
V
V
°C
The V
DD
surge voltage should be 0.5 V or lower
Temperature at Pin-12 Lead (without heatsink)
Remarks
■Electrical
Characteristics
Parameter
Main Supply Current
Logic Supply Current
Output MOSFET Breakdown Voltage
Output MOSFET ON Resistance
Symbol
I
BB
I
BBS
I
DD
V(
BR)DSS
R
DS(ON)
min.
Ratings
typ.
max.
15
100
5
Unit
mA
µA
mA
V
Ω
In operation
Sleep 1 and Sleep 2 modes
VBB=44V, I
D
=1mA
SLA7070M, I
D
=1.0A
SLA7071M, I
D
=1.5A
SLA7072M, I
D
=2.0A
SLA7073M, I
D
=3.0A
SLA7070M, I
D
=1.0A
SLA7071M, I
D
=1.5A
SLA7072M, I
D
=2.0A
SLA7073M, I
D
=3.0A
When Clock Duty = 50%
Conditions
100
0.7
0.45
0.25
0.18
0.85
1.0
0.95
0.95
250
0.25VDD
0.75VDD
±1
±1
0.04
0.04
0.04
0.04
2
±10
V
REF
100
2.0
1.5
0.305
0.305
0.205
0.155
0.7
2.3
3.5
4.6
140
0.3
0.45
0.4
0.45
VDD
0.85
0.6
0.4
0.24
1.1
1.25
1.2
2.1
Output MOSFET Diode Forward Voltage
V
F
V
kHz
V
µA
Maximum Clock Frequency
Logic Input Voltage
Logic Input Current
Fclock
V
IL
V
IH
I
IL
I
IH
V
REF
V
REFS
I
REF
V
SENSE
T
SE
t
con
t
coff
R
S
REF Input Voltage
V
SLA7070M, within the current setting range
SLA7071M, within the current setting range
SLA7072M, within the current setting range
SLA7073M, within the current setting range
Output OFF (Sleep 1)
When step reference current ratio is 100%
Sleep1&Sleep2
Clock
→
Out ON
Clock
→
Out OFF
SLA7070M, tolerance of
±3%
SLA7071M, tolerance of
±3%
SLA7072M, tolerance of
±3%
SLA7073M, tolerance of
±3%
SLA7070xMPR, MPRT, when motor coil shorts out
SLA7070MPR, MPRT/7071MPR, MPRT
SLA7072MPR, MPRT
SLA7073MPR, MPRT
SLA707xMPRT, Rear of case (at the saturation temperature)
SLA707xMPR, MPRT, IFlagL=1.25mA
SLA707xMPR, MPRT, IFlagH=–1.25mA
SLA707xMPR, MPRT
REF Input Current
Sense Voltage
Sleep-Enable Recovery Time
Switching Time
µA
V
µS
µS
µS
0.314
0.314
0.211
0.160
0.75
Ω
V
A
°C
1.25
V
mA
%
%
µs
µs
Sense Resistance
Overcurrent Sense Voltage
Overcurrent Sense Current
Thermal Protection Temperature
Flag Output Voltage
Flag Output Current
Step Reference Current Ratio
PWM Minimum ON Time
PWM OFF Time
Vocp
Iocp
T
tsd
V
FlagL
V
FlagH
I
FlagL
I
FlagH
ModeF
Mode8
ton(min)
toff
0.296
0.296
0.199
0.150
0.65
1.25–VDD
1.25
–1.25
100
70.7
3.2
12
* The direction in which current flows out of the device is regarded as negative.
94
ICs
SLA7070MR, MPR, MPRT/7071MR, MPR, MPRT/7072MR, MPR, MPRT/7073MR, MPR, MPRT
■Internal
Block Diagram
■Pin
Assignment
Pin No.
Symbol
Function
1
2
3
4
14
15
18
6
7
8
9 16 10 15
11
20 21 22 23
MIC
Pre-
Driver
Sequencer
&
Sleep Circuit
Reg
Pre-
Driver
Protect
Protect
DAC
–
DAC
+
SenseA
+
PWM
Control
PWM
Control
R
S
OSC
OSC
17
12
The protect circuit is deleted and the flag pin is N.C. for SLA7070MR, 7071MR, 7072MR, and 7073MR.
■Typical
Connection Diagram
Vs=10V to 44V
+
Vcc=3.0V to 5.5V
r1
Q1
CB
+
Reset
Clock
CW/CCW
Micro-
computer,
etc.
12.9
±0.2
16
±0.2
OutA OutA
C1 VDD
BB
OutB OutB
9.9
±0.2
5
±0.5
M2
M3
Sync
N.C.
Flag
R-end
0.65
–0.1
22
×
P1.27
±0.5
+0.2
Ref/Sleep1
SenseA
= 27.94
±1
(4.3)
0.55
–0.1
+0.2
Gnd
SenseB
r2
r3
C2
One-point
Gnd
31.3
±0.2
(Including the resin burr)
4.5
±0.7
(Measured at the tip)
Logic Gnd
Power Gnd
Forming No. No.2151
Product Mass : Approx.6g
* There is no Flag pin (Pin-18) for SLA7070MR, 7071MR, 7072MR, and 7073MR.
9.5
–0.5
M1
SLA7070M Series
(2-phase/1-2 phase
excitation)
+1
–
5
Synchro
Control
19
SenseB
R
S
1
Phase A output
OutA
2
3
Phase A output
OutA/
4
SenseA
Phase A current sense
5
6
N.C.
N.C.
M1
7
M2
Excitation mode/Sleep 2 setting input
8
9
M3
Clock
Step Clock input
10
V
BB
Driver supply (motor supply)
11
12
Gnd
Device GND
Ref/Sleep1
Control current mode/Sleep 1 setting input
13
V
DD
Logic supply
14
15
Reset
Internal logic reset input
CW/CCW
Normal/reverse control input
16
Sync
PWM control signal input
17
18
Protection circuit monitor output
*1
Flag
*1
SenseB
Phase B current sense
19
20
OutB/
Phase B current output
21
22
OutB
Phase B current output
23
*1: N.C. pin for SLA7070MR, 7071MR, 7072MR, and 7073MR.
Ref/Sleep1
CW/CCW
Reset
Clock
OutA
OutA
OutA
OutA
OutB
OutB
OutB
OutB
N.C.
Flag
V
DD
V
BB
M1
M2
M3
■External
Dimensions (ZIP23 with Fin[SLA23Pin])
31
±0.2
24.4
±0.2
16.4
±0.2
4.8
±0.2
1.7
±0.1
Gate burr
φ
3.2
±0.15
×
3.8
CA
φ
3.2
±0.15
2.45
±0.2
(Measured at
the root)
4–(R1)
ICs
95
Microcontroller MCU
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