73004TN(OT) No.7946-1/12
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft's control
systems, or other applications whose failure can be reasonably expected to result in serious physical and/or
material damage. Consult with your SANYO representative nearest you before using any SANYO products
described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained herein.
SANYO Electric Co., Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
SANYO Semiconductors
DATA SHEET
LB11946
Monolithic Digital IC
PWM Current Control Stepping
Motor Driver
Overview
The LB11946 is a stepping motor driver IC that implements PWM current control bipolar drive with a fixed off
time. This IC features 15 current setting levels using a fixed VREF voltage and support for microstepping drive from
1-2 phase excitation drive to 4W1-2 phase excitation drive. This device is optimal for driving stepping motors such
as those used for carriage drive and paper feed in printers.
Features
PWM current control (with a fixed off time)
Logic input serial-parallel converter (allows 1-2, W1-2, 2W1-2, and 4W1-2 phase excitation drive)
Current attenuation switching function (with slow decay, fast decay, and mixed decay modes)
Built-in upper and lower side diodes
Simultaneous on state prevention function (through current prevention)
Noise canceller function
Thermal shutdown circuit
Shutoff on low logic system voltage circuit
Low-power mode control pin
Specifications
Absolute Maximum Ratings at Ta 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Motor supply voltage
VBB
50
V
Peak output current
I
O
peak
tw 20 S
1.2
A
Continuous output current
I
O
max
1.0
A
Logic system supply voltage
V
CC
7.0
V
Logic input voltage range
V
IN
0.3 to V
CC
V
VE
V
CC
5 V specifications
1.0
V
Emitter output voltage
VE
V
CC
3.3 V specifications
0.5
V
Allowable power dissipation (IC internal)
Pdmax
Ta 25C, independent IC
3.0
W
Operating temperature
Topr
20 to 85
C
Storage temperature
Tstg
55 to 150
C
Ordering number : ENN7946
LB11946
No.7946-2/12
Recommended Operating Conditions at Ta 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Motor supply voltage
V
BB
10 to 45
V
V
CC
5 V specifications
4.5 to 5.5
V
Logic system supply voltage
V
CC
V
CC
3.3 V specifications
3.0 to 3.6
V
V
CC
5 V specifications
0.0 to 3.0
V
Reference voltage
V
REF
V
CC
3.3 V specifications
0.0 to 1.0
V
Electrical Characteristics at Ta = 25C, V
CC
= 5 V, V
BB
= 42 V, V
REF
= 1.52 V
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
[Output Block]
IBB-ON
0.9
1.3
1.7
mA
Output stage supply current
IBB-OFF
0.52
0.7
1.05
mA
Output saturation voltage 1
V
O
(sat) 1
I
O
0.5 A (sink)
1.1
1.4
V
Output saturation voltage 2
V
O
(sat) 2
I
O
1.0 A (sink)
1.4
1.7
V
Output saturation voltage 3
V
O
(sat) 3
I
O
0.5 A (source)
1.9
2.2
V
Output saturation voltage 4
V
O
(sat) 4
I
O
1.0 A (source)
2.2
2.5
V
I
O
1 (leak)
V
O
V
BB
(sink)
50
A
Output leakage current
I
O
2 (leak)
V
O
0V (source)
50
A
Output sustain voltage
V
SUS
L 15 mH, I
O
1.0 A
45
V
[Logic Block]
I
CC
ON
D0 1, D1 1, D2 1, D3 1 When these data
values are set
24
35
46
mA
I
CC
OFF1
D0 0, D1 0, D2 0, D3 0
22
32
42
mA
Logic system supply current
I
CC
OFF2
ST LOW
0.05
0.1
mA
V
IH
2
V
Input voltage
V
IL
0.8
V
I
IH
V
IH
2 V
35
A
Input current
I
IL
V
IL
0.8 V
6
A
D0 1, D1 1, D2 1, D3 1 When these data
values are set
0.470
0.50
0.525
V
D0 1, D1 1, D2 1, D3 0
0.445
0.48
0.505
V
D0 1, D1 1, D2 0, D3 1
0.425
0.46
0.485
V
D0 1, D1 1, D2 0, D3 0
0.410
0.43
0.465
V
D0 1, D1 0, D2 1, D3 1
0.385
0.41
0.435
V
D0 1, D1 0, D2 1, D3 0
0.365
0.39
0.415
V
D0 1, D1 0, D2 0, D3 1
0.345
0.37
0.385
V
D0 1, D1 0, D2 0, D3 0
0.325
0.35
0.365
V
D0 0, D1 1, D2 1, D3 1
0.280
0.30
0.325
V
D0 0, D1 1, D2 1, D3 0
0.240
0.26
0.285
V
D0 0, D1 1, D2 0, D3 1
0.195
0.22
0.235
V
D0 0, D1 1, D2 0, D3 0
0.155
0.17
0.190
V
D0 0, D1 0, D2 1, D3 1
0.115
0.13
0.145
V
Sense voltages
VE
D0 0, D1 0, D2 1, D3 0
0.075
0.09
0.100
V
Reference current
I
REF
V
REF
1.5 V
0.5
A
CR pin current
ICR
CR 1.0 V
1.6
1.2
0.8
mA
MD pin current
IMD
MD 1.0 V, CR 4.0 V
5.0
A
Logic system on voltage
VLSDON
2.6
2.8
3.0
V
Logic system off voltage
VLSDOFF
2.45
2.65
2.85
V
LVSD hysteresis
VLHIS
0.03
0.15
0.35
V
Thermal shutdown temperature
Ts
Design guarantee
170
C
LB11946
No.7946-3/12
AC Electrical Characteristics at V
CC
5 V
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Clock frequency
Fclk
V
CC
5.0 V
200
550
kHz
Data setup time
T
DS
V
CC
5.0 V
0.9
2.5
S
Data hold time
T
DH
V
CC
5.0 V
0.9
2.5
S
Minimum clock high-level pulse width
T
SCH
V
CC
5.0 V
0.9
2.5
S
Minimum clock low-level pulse width
T
SCL
V
CC
5.0 V
0.9
2.5
S
SET pin stipulated time
Tlat
V
CC
5.0 V
0.9
2.5
S
SET pin signal pulse width
Tlatw
V
CC
5.0 V
1.9
5.0
S
CLK
SET
D4 D5 D6
D10 D11
T
DS
T
DH
T
SCL
T
SCH
Tlat
Fclk
Tlatw
DATA
LB11946
No.7946-4/12
Electrical Characteristics at Ta = 25C, V
CC
= 3.3 V, V
BB
= 42 V, V
REF
= 1.0 V
(When measuring the sense voltage: V
REF
= 1.03 V)
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
[Output Block]
I
BB
ON
0.9
1.3
1.7
mA
Output stage supply current
I
BB
OFF
0.52
0.7
1.05
mA
Output saturation voltage 1
V
O
(sat) 1
I
O
0.5 A (sink)
1.2
1.5
V
Output saturation voltage 2
V
O
(sat) 2
I
O
1.0 A (sink)
1.5
1.8
V
Output saturation voltage 3
V
O
(sat) 3
I
O
0.5 A (source)
2.0
2.3
V
Output saturation voltage 4
V
O
(sat) 4
I
O
1.0 A (source)
2.3
2.6
V
I
O
1 (leak)
V
O
V
BB
(sink)
50
A
Output leakage current
I
O
2 (leak)
V
O
0 V (source)
50
A
Output sustain voltage
V
SUS
L 15 mH I
O
1.5A
45
V
[Logic Block]
I
CC
ON
D0 1, D1 1, D2 1, D3 1
When these data values are set
21
30
39
mA
I
CC
OFF1
D0 0, D1 0, D2 0, D3 0
19
28
36.5
mA
Logic system supply current
I
CC
OFF2
ST 0.8 V
0.03
0.1
mA
V
IH
2
V
Input voltage
V
IL
0.8
V
I
IH
V
IH
2 V
35
A
Input current
I
IL
V
IL
0.8 V
6
A
D0 1, D1 1, D2 1, D3 1 V
REF
1.03 V
0.303
0.330
0.356
V
D0 1, D1 1, D2 1, D3 0 V
REF
1.03 V
0.290
0.315
0.341
V
D0 1, D1 1, D2 0, D3 1 V
REF
1.03 V
0.276
0.300
0.324
V
D0 1, D1 1, D2 0, D3 0 V
REF
1.03 V
0.263
0.286
0.309
V
D0 1, D1 0, D2 1, D3 1 V
REF
1.03 V
0.250
0.272
0.294
V
D0 1, D1 0, D2 1, D3 0 V
REF
1.03 V
0.236
0.257
0.278
V
D0 1, D1 0, D2 0, D3 1 V
REF
1.03 V
0.223
0.243
0.263
V
D0 1, D1 0, D2 0, D3 0 V
REF
1.03 V
0.209
0.228
0.247
V
D0 0, D1 1, D2 1, D3 1 V
REF
1.03 V
0.183
0.200
0.217
V
D0 0, D1 1, D2 1, D3 0 V
REF
1.03 V
0.155
0.170
0.185
V
D0 0, D1 1, D2 0, D3 1 V
REF
1.03 V
0.128
0.143
0.158
V
D0 0, D1 1, D2 0, D3 0 V
REF
1.03 V
0.102
0.114
0.126
V
D0 0, D1 0, D2 1, D3 1 V
REF
1.03 V
0.074
0.085
0.096
V
Sense voltages
VE
D0 0, D1 0, D2 1, D3 0 V
REF
1.03 V
0.047
0.057
0.067
V
Reference current
I
REF
V
REF
1.0 V
0.5
A
CR pin current
ICR
CR 1.0 V
0.91
0.7
0.49
mA
MD pin current
IMD
MD 1.0 V, CR 4.0V
5.0
A
LVSD voltage
VLSDON
2.6
2.8
3.0
V
Logic system off voltage
VLSDOFF
2.45
2.65
2.85
V
LVSD hysteresis
VLHIS
0.03
0.15
0.35
V
Thermal shutdown temperature
Ts
Design guarantee
170
C
LB11946
No.7946-5/12
AC Electrical Characteristics at V
CC
3.3 V
Ratings
Parameter
Symbol
Conditions
min
typ
max
Unit
Clock frequency
Fclk
V
CC
3.3 V
200
550
kHz
Data setup time
T
DS
V
CC
3.3 V
0.9
2.5
S
Data hold time
T
DH
V
CC
3.3 V
0.9
2.5
S
Minimum clock high-level pulse width
T
SCH
V
CC
3.3 V
0.9
2.5
S
Minimum clock low-level pulse width
T
SCL
V
CC
3.3 V
0.9
2.5
S
SET pin stipulated time
Tlat
V
CC
3.3 V
0.9
2.5
S
SET pin signal pulse width
Tlatw
V
CC
3.3 V
1.9
5.0
S
CLK
SET
D4 D5 D6
D10 D11
T
DS
T
DH
T
SCL
T
SCH
Tlat
Fclk
Tlatw
DATA
Package Dimensions
unit: mm
3147C
SANYO : DIP-28H (500mil)
LB11946
No.7946-6/12
Pin Assignment
27
28
25
26
23
24
18
19
20
21
22
15
16
17
11
8
9
10
14
13
12
6
7
4
5
1
2
3
OUT
B
-
OUT
B
D-GND
A
D-GNDB
NC
NC
E1
E2
NC
VBB
GND
VREF2
NC
CR2
NC
ST
SET
DATA
CL
K
VCC
VREF1
NC
CR1
MD
OUT
A
-
OUT
A
NC
VBB
LB11946
Note : The D-GNDA and D-GNDB pins are the anode sides of the lower side diodes.
LB11946
No.7946-7/12
Block Diagram
LB11946
No.7946-8/12
Timing Chart
CLO CK
DATA
SET
D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11
T
SCH
T
SCL
Serially Transferred Data Definition
IA4
IA3
IA2
IA1
DE1
PH1
IB4
IB3
IB2
IB1
DE2
PH2
Output mode
No.
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
OUTA
OUTA
OUTB
OUTB
I/O
ratio
DEC
MODE
0
1
1
1
1
1
1
1
1
1
1
1
1
H
L
H
L
100%
SLOW
1
1
1
1
0
1
1
1
1
1
0
1
1
H
L
H
L
96
SLOW
2
1
1
0
1
1
1
1
1
0
1
1
1
H
L
H
L
91
SLOW
3
1
1
0
0
1
1
1
1
0
0
1
1
H
L
H
L
87
SLOW
4
1
0
1
1
1
1
1
0
1
1
1
1
H
L
H
L
83
SLOW
5
1
0
1
0
1
1
1
0
1
0
1
1
H
L
H
L
78
SLOW
6
1
0
0
1
1
1
1
0
0
1
1
1
H
L
H
L
74
SLOW
7
1
0
0
0
1
1
1
0
0
0
1
1
H
L
H
L
70
SLOW
8
0
1
1
1
1
1
0
1
1
1
1
1
H
L
H
L
61
SLOW
9
0
1
1
0
1
1
0
1
1
0
1
1
H
L
H
L
52
SLOW
10
0
1
0
1
1
1
0
1
0
1
1
1
H
L
H
L
44
SLOW
11
0
1
0
0
1
1
0
1
0
0
1
1
H
L
H
L
35
SLOW
12
0
0
1
1
1
1
0
0
1
1
1
1
H
L
H
L
26
SLOW
13
0
0
1
0
1
1
0
0
1
0
1
1
H
L
H
L
17
SLOW
14
1
1
1
1
0
0
1
1
1
1
0
0
L
H
L
H
100
FAST
15
1
1
1
0
0
0
1
1
1
0
0
0
L
H
L
H
96
FAST
16
1
1
0
1
0
0
1
1
0
1
0
0
L
H
L
H
91
FAST
17
1
1
0
0
0
0
1
1
0
0
0
0
L
H
L
H
87
FAST
18
1
0
1
1
0
0
1
0
1
1
0
0
L
H
L
H
83
FAST
19
1
0
1
0
0
0
1
0
1
0
0
0
L
H
L
H
78
FAST
20
1
0
0
1
0
0
1
0
0
1
0
0
L
H
L
H
74
FAST
21
1
0
0
0
0
0
1
0
0
0
0
0
L
H
L
H
70
FAST
22
0
1
1
1
0
0
0
1
1
1
0
0
L
H
L
H
61
FAST
23
0
1
1
0
0
0
0
1
1
0
0
0
L
H
L
H
52
FAST
24
0
1
0
1
0
0
0
1
0
1
0
0
L
H
L
H
44
FAST
25
0
1
0
0
0
0
0
1
0
0
0
0
L
H
L
H
35
FAST
26
0
0
1
1
0
0
0
0
1
1
0
0
L
H
L
H
26
FAST
27
0
0
1
0
0
0
0
0
1
0
0
0
L
H
L
H
17
FAST
28
0
0
0
0
*
*
0
0
0
0
*
*
OFF
OFF
OFF
OFF
0
Note : Either 0 or 1.
Note 1: In mixed decay mode, set D4 and D10 to 0 and set the MD pin to a level in the range 1.5 to 4.0 V.
LB11946
No.7946-9/12
Current Settings Truth Table
Current Settings Truth Table * Items in parentheses are defined by the serial data.
IA4
(D0)
IA3
(D1)
IA2
(D2)
IA1
(D3)
Set current Iout
Current ratio (%)
1
1
1
1
11.5/11.5 VREF/3.04RE Iout
100
1
1
1
0
11.0/11.5 VREF/3.04RE Iout
95.65
1
1
0
1
10.5/11.5 VREF/3.04RE Iout
91.30
1
1
0
0
10.0/11.5 VREF/3.04RE Iout
86.95
1
0
1
1
9.5/11.5 VREF/3.04RE Iout
82.61
1
0
1
0
9.0/11.5 VREF/3.04RE Iout
78.26
1
0
0
1
8.5/11.5 VREF/3.04RE Iout
73.91
1
0
0
0
8.0/11.5 VREF/3.04RE Iout
69.56
0
1
1
1
7.0/11.5 VREF/3.04RE Iout
60.87
0
1
1
0
6.0/11.5 VREF/3.04RE Iout
52.17
0
1
0
1
5.0/11.5 VREF/3.04RE Iout
43.48
0
1
0
0
4.0/11.5 VREF/3.04RE Iout
34.78
0
0
1
1
3.0/11.5 VREF/3.04RE Iout
26.08
0
0
1
0
2.0/11.5 Vref/3.04RE Iout
17.39
Note : The current ratios shown are calculated values.
Sample Application Circuit at V
CC
= 5 V
10
2
13 14
12
11
9
8
7
6
5
4
3
1
15
16
17
18
19
20
21
22
23
24
25
26
27
28
LB11946
VBB
E1
NC
NC
DGNDA
OUT
A
-
OUT
A
OUT
B
-
OUT
B
DGNDB
NC
NC
E2
VBB
G
N
D
VREF
2
N
C
CR
2
S
T
SE
T
DAT
A
CL
K
M
D
CR1
VREF
1
VC
C
10 F
5 V
47
F
680 pF
30 k
Logic level inputs
M
N
C
N
C
42 V
680 pF
30 k
0.51
1.5 V
0.1
F
MD voltage
setting
(1.6 to 3.9 V)
Fast mode:
ground
Slow mode:
VCC
0.51
LB11946
No.7946-10/12
Sample Application Circuit at V
CC
= 3.3 V
10
2
13 14
12
11
9
8
7
6
5
4
3
1
15
16
17
18
19
20
21
22
23
24
25
26
27
28
LB11946
VBB
E1
NC
NC
DGNDA
OUT
A
-
OUT
A
OUT
B
-
OUT
B
DGNDB
NC
NC
E2
VBB
G
N
D
VREF
2
N
C
CR
2
S
T
SE
T
DAT
A
CL
K
M
D
CR1
VREF
1
VC
C
10 F 3.3 V
47
F
680 pF
30 k
Logic level inputs
M
N
C
N
C
42 V
680 pF
30 k
0.51
1.0 V
0.1
F
MD voltage
setting
(1.2 to 2.5 V)
Fast mode:
ground
Slow mode: VCC
0.51
LB11946
No.7946-11/12
Switching Off Time and Noise Canceller Time Calculations
Notes on the CR Pin Setting (switching off time and noise canceller time)
The noise canceller time (Tn) and the switching off time (Toff) are set using the following formulas.
When V
CC
is 5 V
Noise canceller time (Tn)
Tn C R ln{(1.5-RI)/(4.0-RI)}[s]
CR pin charge current: 1.25 mA
Switching off time (Toff)
Toff C R ln (1.5/4.8)[s]
Component value ranges
R: 5.6 k to 100 k
C: 470 pF to 2000 pF
When V
CC
is 3.3 V
Noise canceller time (Tn)
Tn C R ln {(1.06-RI)/(2.66-RI)}[s]
CR pin charge current: 0.7 mA
Switching off time (Toff)
Toff C R ln (1.06/3.1)[s]
VCC line
One-shot mult-
vibrator blanking time
circuit
CR pin
E1
C: 680pF
R: 30 k
CR Pin Internal Circuit Structure
Notes on the MD Pin
If slow decay mode is set up by setting the D4 and D10 bits in the input serial data to 1, the MD pin must be shorted
to ground.
If fast decay mode is set up by setting the D4 and D10 bits in the input serial data to 0, mixed decay mode can be set
with the MD pin.
When the V
CC
= 5 V specifications are used the setting voltage range for mixed decay mode is 1.6 to 3.9 V.
When the V
CC
= 3.3 V specifications are used the setting voltage range for mixed decay mode is 1.2 to 2.5 V.
If mixed decay mode will not be used with the fast decay mode setting, either:
(a) Short the MD pin to ground to select fast decay mode, or
(b) Short the MD pin to V
CC
to select slow decay mode.
LB11946
No.7946-12/12
Usage Notes
Notes on the V
REF
pin
Since the V
REF
pin inputs the reference voltage used to set the current, applications must be designed so that noise
does not occur at this pin.
Notes on the ground pins
Since this IC switches large currents, care is required with respect to the ground pins.
The PCB pattern in sections where large currents flow must be designed with low impedances and must be kept
separate from the small-signal system.
In particular, the ground terminals of the E1 and E2 pin sense resistors (RE) and the external Schottky barrier diode
ground terminals must be located as close as possible to the IC ground. The capacitors between V
CC
and ground and
between V
BB
and ground must be as close as possible to the corresponding V
CC
and V
BB
pin in the pattern.
Power on sequence
When turning the power systems on
V
CC
logic level inputs (CLK, DATA, SET, and ST) VREF V
BB
When turning the power systems off
V
BB
VREF logic level inputs (CLK, DATA, SET, and ST) V
CC
Note that if the power supply for the logic level inputs is on when the V
CC
power supply is off, a bias with an
unstable state will be applied due to the protection diodes at the V
CC
pins, and this can cause incorrect operation.
Specifications of any and all SANYO products described or contained herein stipulate the performance,
characteristics, and functions of the described products in the independent state, and are not guarantees
of the performance, characteristics, and functions of the described products as mounted in the customer's
products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer's products or
equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all
semiconductor products fail with some probability. It is possible that these probabilistic failures could give
rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that
could cause damage to other property. When designing equipment, adopt safety measures so that these
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and error prevention circuits for safe design, redundant design, and structural design.
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Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for
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Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
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This catalog provides information as of July, 2004. Specifications and information herein are subject to
change without notice.
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