2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
■General Description
Combining low-power CMOS logic with high-current, high-voltage
power FET outputs, the Series SLA705xM translator/driver provides
complete control and drive for a two-phase unipolar stepper motor
with internal fixed off time, pulse-width modulation (PWM) control
of the output current in a power multi-chip module (PMCM™).
The CMOS logic section provides the sequencing logic, direction,
full/half-step control, synchronous/asynchronous PWM operation,
and a "sleep" function. The minimum CLOCK input is an ideal fit
for applications where a complex µP is unavailable or overburdened.
TTL or LSTTL may require the use of appropriate pull-up resistors
to ensure a proper input-logic high. For PWM current control, the
maximum output current is determined by the user's selection of a
reference voltage and sensing resistor. The NMOS outputs are
capable of sinking up to 1,2 or 3 A and withstanding 46 V in the off
state. Ground-clamp and flyback diodes provide protection against
inductive transients. Special power-up sequencing is not required.
Full-step (2 phase) and half-step operation are externally selectable.
Two-phase drive energizes two adjacent phases in each detent
position (AB-BC-CD-DA). This sequence mode offers an improved
torquespeed product, greater detent torque, and is less susceptable to
motor resonance. Half-step excitation alternates between the
one-phase and two-phase modes (A-AB-B-BC-C-CD D-DA),
providing an eight-step sequence.
■Package----SLA18Pin
■Applications
●PPC
●Printer
●OA Equipment
■Features
●To 3A Output Rating
●Internal Sequencer for Full or Half-Step Operation
●PWM Constant-Current Motor Drive
●Cost-Effective, Multi-Chip Solution
●100 V, Avalanche-Rated NMOS
●Low rDS(on) NMOS Outputs (300 milli-ohms typical)
●Advanced, Improved Body Diodes
●Half-Step and Full-Step Unipolar Drive
●Inputs Compatible with 3.3 V or 5 V Control Signals
●Sleep Mode
●Internal Clamp Diodes
■Key Specifications
●Motor Supply Voltage (VM)：44V max
●Load Supply Voltage (Vs)：10V～44V
●Logic Supply Voltage (Vcc)：3V～5.5V
●Output Current (Io)：1A(SLA7050M)
2A(SLA7051M)
3A(SLA7052M)
●Output Maximum Voltage (VDSS)：100V min
Typical Connection
７０５０SLA M
７０５１SLA M
７０５２SLA M
マイコン
等
1813 1614
4
15
5
7
8
9
11
12
6
2
17
13
Vs
GA
NC
OutA OutA/ OutBOutB/
Vcc
Clock
Sync
CW/CCW
Full/Half
Ref SenseBSenseA Gnd
10
r1
r2
Disable
Q1
RsA RsB
＋
＋
CA
CB
～Vs=10V 44V
～Vcc=3.0V 5.5V
S-Gnd P-Gnd
Gnd
NC
GB
http://www.sanken-ele.co.jp/en/
1/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Scope
The present specifications shall apply to Sanken 2 Phase Stepper Motor Driver IC,SLA705xM Series.
The present specifications shall apply to SLA 705xM Series which is performed RoHS instructions.
Lead part solder：Pb free Inner solder：Lead content ＞85%
Outline
Type Hybrid integrated circuit
Structure Plastic molded (transfer mold)
Applications To drive a 2 phase stepper motor.
(Full or Half Step. PWM Current Control.)
Absolute maximum ratings
Characteristic Symbol Ratings Unit Remarks
Motor Supply Voltage VM 46 V
Load Supply Voltage VS 46 V
Logic Supply Voltage Vcc 7 V
1.0 SLA7050M
2.0 SLA7051M
Output Current Io
3.0
A
SLA7052M
Logic Input Voltage VIN －0.3～Vcc＋0.3 V
REF Input Voltage VREF －0.3～Vcc＋0.3 V
Sense Voltage VRs －2～2 V
Tw<1μS doesn't
contain it.
4 W
at Ta=25℃
Total Device Dissipation PD 20 W
at Tc=25℃
Junction Temperature Tj 150 ℃
Operating Temperature
Range Ta －20～85 ℃
Storage Temperature Range Tstg －30～150 ℃
2/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Electrical characteristics
Recommendable Operating Range
Electrical Characteristic (Ta=25℃,Vs=24V,Vcc=5V Unless Otherwise Noted)
Ratings
Characteristic Symbol MIN MAX
Unit Remarks
Motor Supply Voltage VM 44 V
Load Supply Voltage VS 10 44 V
Logic Supply Voltage Vcc 3.0 5.5 V
Please adjust the Vcc surge
voltage to 0.5V or less.
REF Input Voltage VREF 0.1 1.0 V
The control current
accuracy decreases in 0.1V
or less.
Package Temperature Tc 100 ℃ 10Pin temperature
（at No Fin）
Limits
Characteristic Symbol MIN TY
P
MAX Unit Test Condition
IS 15 mA Regularity
Load Supply Current ISS 100 μA at SLEEP operates
Logic Supply Current Icc 3 mA
Output Maximum Voltage VDSS 100 V VS=44V
IDSS=1mA
FET On-State Resistance RDS(on) 0.3 0.5 Ω ID=1A
FET Diode Forward Voltage VSD 0.8 1.1 V ISD=1A
Maximum Clock Frequency Fclock 100 kHz
VIL Vcc×0.2
5
V
Logic Input Voltage V
I
HVcc×0.7
5
V
I
IL ±1μ
A
Logic Input Current
I
IH ±1μ
A
VREF 0 1.5 V
Stationary current
control
REF Input Voltage
VREFS 2.0 Vcc V Output OFF(Sleep)
REF Input Current IREF ±10 μA
Sense Voltage VRs VREF V
3/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Electrical Characteristic (Ta=25℃,Vs=24V,Vcc=5V Unless Otherwise Noted)
Truth table
Input Logic Timing
10μS(min)
5μS(min) 5μS(min)
2μS(min) 2μS(min) 2μS(min) 2μS(min)
Limits
Characteristic Symbol MIN TYP MAX
Unit Test Condition
PWM OFF Time TOFF 12 μS
PWM Minimum ON Time TON(min) 5 μS
Sleep-Enable return time TSE 100 μS VREF：2.0→1.5V
Io：1.5 A
TONC 2.5 μS Clock→Out
Switching Time TOFFC 2.0 μS Clock→Out
Pin Function Low level High level
CW／CCW Forward(CW) Reverse(CCW)
Full／Half Full Step Half Step
REF Enable Output disable(Sleep)
Sync Non synchronous PWM Synchronous PWM
Clock Positive Edge
CW／CCW
&
Full／Half
Clock
4/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Timing chart
Vcc
Clock
CW/CCW
F/H
OUT_ A
OUT_ /A
OUT_ B
OUT_ /B
Step
024602420654321076567012460
・This timing chart is a voltage mark.
・PWM signal for current control is not superimposed on this timing chart.
5/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Heat design data
Total Power－ΔT indegc
Ta‐P
0
0.5
1
1.5
2
2.5
3
3.5
4
4.5
0 102030405060708090100
Ambient Temperature (℃)
Allowable Package Power
Dissipation in Watts (W)
θj-a=31.25(℃/W)
0
25
50
75
100
125
150
012345
Total Power P (W)
ΔT (℃)
ΔTj-a
ΔTc-a
Ta=25℃
Air cooling without blower (No Fin)
θj-a=31.25(℃/W) θc-a=27.5
(
℃/W
)
※The temperature of the case is 10pin.
6/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Block diagram (Connection diagram)
Pin arrangement ,Functional table
Pin Number Symbol Function
1 OutA Phase A Output
2 N.C. No Contact
3 OutA/ Phase A/ Output
4 GA※ Phase A Gate
5 Vcc Logic supply
6 SenseA Phase A current sense
7 Clock Step clock
8 Sync Synchronous PWM control
9 Ref Current reference & Output disable
10 GND GND
11 CW/CCW Forward reverse control
12 Full/Half Full step half step control
13 SenseB Phase B current sense
14 Vs Load supply
15 GB※ Phase B Gate
16 OutB/ Phase B/ Output
17 N.C. No Contact
18 OutB Phase B Output
※The gating signal of MOS FET outputs, and use 4pin and 15pin by the unwiring, please.
OutA
OutB
Reg
Sequencer
PWM
Control
PWM
Control
Synchro
Control
OSC OSC
Sleep
Control
＋
－
＋
－
Full/Half
Vs
Clock
Vcc
GA
OutA/
OutB/
MIC
SenseA
SenseB
Gnd
Sync
Ref
GA
GA/ GB/
GB
13 2
N.C.
4
CW/CCW
11 12 14 7 5
GB
17
N.C.
16 18
1310896
15
7/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Example application circuit
Reference constant
CA=100μF／50V
CB=10μF／10V
Q1：
Rs=0.1～2Ω(Loss attention P≒Io2×Rs)
R1=10kΩ
R2=5.1kΩ(VR)
☆Be careful of especially the noise on Vcc line.
If the noise on Vcc line exceeds 0.5V, a product may incorrect-operate.
☆When you do not use Logic inputs (CW/CCW and F/H, Sync), please be sure to connect with
Vcc or GND.
☆To minimize the effect of system ground I･R drops on the logic and reference input signals,
Ground pin should have a low-impedance return to system groud.
☆2pin,4pin,15pin and 17pin are No Contact.
SLA7050M
SLA7051M
SLA7052M
マイコン
等
1813 1614
4
15
5
7
8
9
11
12
6
2
17
13
Vs
GA
NC
Out
AOutA/ Out
B
OutB/
Vcc
Clock
Sync
CW/
CCW
Full/Half
Ref SenseBSenseA Gnd
10
r1
r2
Disable
Q1
RsA RsB
＋
＋
CA
CB
～Vs=10V 44V
～Vcc=3.0V 5.5V
S-Gnd P-Gnd
Gnd
NC
GB
8/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Package informationｓ
Package type and physical dimensions
Appearance
The body shall be clean and shall not bear any stain, rust or flaw.
Marking
The type number and lot number shall be clearly marked in white.
a. Type Number SLA705xM
b. Lot Number
1st letter The last digit of year
2nd letter Month
1～9月：Arabic Numerals
10 月 ：O
11 月 ：N
12 月 ：D
(1 to 9 for Jan. to Sept. O for Oct.
N for Nov. D for Dec.)
3rd &4th letter day
01～31： Arabic Numerals
a
b
Dimensions in mm
9/14
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Packing specifications
・A rubber stopper is provided
on both ends of the stick.
・18 pieces in X direction
(Maximum 18 pieces in one stick)
・20 sticks in Y direction
3 sticks in Y direction
・18pieces×20×3=1080pieces(Max.)
185
130
610
31
8
580
X
Z
Y
Dimensions in mm
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Cautions and warnings
The calculation of control current
SLA705xM Series control current Io is calculated as follow.
Io＝VREF／Rs
REF Voltage range is 0.1V～1.0V
※When the REF<0.1V, the accuracy of control current is reduce.
Moreover, if REF voltage is set up more than 2.0V, all outputs will be in OFF state.
Installation to a heat sink
1)Recommended Clamping Torque (to External Heat sink) 0.490～0.822N･m
2)Recommended Silicone
Notice
This driver has C-MOS inputs. Please notice as following contents.
・When static electricity is a problem, care should be taken to properly control
the room humidity. This is particularly true in the winter when static
electricity is most troublesome.
・Care should be taken with device leads and with assembly sequencing to avoid
applying static charges to IC leads. PC board pins should be shorted together
to keep them at the same potential to avoid this kind of trouble.
G746
YG6260
SC102
｛SHIN-ETSU CHEMICAL｝
｛GE TOSHIBA SILICONES｝
｛DOW CORNING TORAY SILICONE｝
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
<Worldwide Contacts>
Asia Pacific
China
Sanken Electric Hong Kong Co., Ltd.
Suite 1026 Ocean Centre, Canton Road, Tsimshatsui, Kowloon, Hong Kong
Tel: 852-2735-5262
Fax: 852-2735-5494
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Room3202, Maxdo Centre, Xingyi Road 8, Changning district, Shanghai, China
Tel: 86-21-5208-1177
Fax: 86-21-5208-1757
Taiwan Sanken Electric Co., Ltd.
Room 1801, 18th Floor, 88 Jung Shiau East Road, Sec. 2, Taipei 100, Taiwan R.O.C.
Tel: 886-2-2356-8161
Fax: 886-2-2356-8261
India
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Office No.13, First Floor, Bandal - Dhankude Plaza, Near PMT Depot, Paud Road, Kothrud, Pune - 411 038, India
Tel: 91-20-5621-2340
91-20-2528-5449
Fax: 91-20-2528-5459
Japan
Sanken Electric Co., Ltd. Overseas Sales Headquaters
Metropolitan Plaza Bldg. 1-11-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-0021, Japan
Tel: 81-3-3986-6164
Fax: 81-3-3986-8637
Korea
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Mirae Asset Life Bldg. 6F, 168 Kongduk-dong, Mapo-ku, Seoul, 121-705, Korea
Tel: 82-2-714-3700
Fax: 82-2-3272-2145
Singapore
Sanken Electric Singapore Pte. Ltd.
150 Beach Road, #14-03 The Gateway West, Singapore 189720
Tel: 65-6291-4755
Fax: 65-6297-1744
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
Europe
United Kingdom
Sanken Power Systems (UK) Limited
Pencoed Technology Park, Pencoed, Bridgend CF35 5HY. UK
Tel: 44-1656-869-100
Fax: 44-1656-869-162
North America
United States
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Worcester, Massachusetts 01606, U.S.A.
Tel: 1-508-853-5000
Fax: 1-508-853-3353
Allegro MicroSystems, Inc. (Southern California)
14 Hughes Street, Suite B105, Irvine, CA 92618
Tel: 1-949-460-2003
Fax: 1-949-460-7837
2-Phase Unipolar Stepper Motor Driver
SLA7050M/7051M/7052M October 2005
Sanken Electric Co.,Ltd.
I03-002EA-051006
CAUTION / WARNING
●The information in this publication has been carefully checked and is believed to be accurate; however, no
responsibility is assumed for inaccuracies.
● Sanken reserves the right to make changes without further notice to any products herein in the interest of
improvements in the performance, reliability, or manufacturability of its products.
Before placing an order, Sanken advises its customers to obtain the latest version of the relevant information to verify
that the information being relied upon is current.
● Application and operation examples described in this catalog are quoted for the sole purpose of reference for the use
of the products herein and Sanken can assume no responsibility for any infringement of industrial property rights,
intellectual property rights or any other rights of Sanken or any third party which may result from its use.
● When using the products herein, the applicability and suitability of such products for the intended purpose or object
shall be reviewed at the users’ responsibility.
● Although Sanken undertakes to enhance the quality and reliability of its products, the occurrence of failure nd defect
of semiconductor products at a certain rate is inevitable. Users of Sanken products are requested to take, at their own
risk, preventative measures including safety design of the equipment or systems against any possible injury, death,
fires or damages to the society due to device failure or malfunction.
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