Ordering number : ENN7946
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
Parameter
25qC
Symbol
Motor supply voltage
VBB
Peak output current
IO peak
Continuous output current
IO max
Conditions
Ratings
Unit
50
tw d 20 PS
V
1.2
A
1.0
A
V
Logic system supply voltage
VCC
7.0
Logic input voltage range
VIN
0.3 to VCC
V
5 V specifications
1.0
V
3.3 V specifications
0.5
V
25°C, independent IC
3.0
W
VE
Emitter output voltage
VE
Allowable power dissipation (IC internal)
Pdmax
VCC
VCC
Ta
Operating temperature
Topr
20 to 85
qC
Storage temperature
Tstg
55 to 150
qC
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
73004TN(OT) No.7946-1/12
LB11946
Recommended Operating Conditions at Ta
Parameter
Motor supply voltage
Logic system supply voltage
Reference voltage
25qC
Symbol
Conditions
Ratings
VBB
VCC
VREF
Unit
10 to 45
V
4.5 to 5.5
V
VCC
5 V specifications
VCC
3.3 V specifications
3.0 to 3.6
V
VCC
5 V specifications
0.0 to 3.0
V
VCC
3.3 V specifications
0.0 to 1.0
V
Electrical Characteristics at Ta = 25°C, VCC = 5 V, VBB = 42 V, VREF = 1.52 V
Parameter
Symbol
Conditions
Ratings
min
typ
max
Unit
[Output Block]
Output stage supply current
IBB-ON
0.9
1.3
1.7
mA
IBB-OFF
0.52
0.7
1.05
mA
V
Output saturation voltage 1
VO(sat) 1
IO
0.5 A (sink)
1.1
1.4
Output saturation voltage 2
VO(sat) 2
IO
1.0 A (sink)
1.4
1.7
V
Output saturation voltage 3
VO(sat) 3
IO
0.5 A (source)
1.9
2.2
V
1.0 A (source)
2.2
2.5
V
50
PA
Output saturation voltage 4
Output leakage current
Output sustain voltage
VO(sat) 4
IO
IO1 (leak)
VO
IO2 (leak)
VO
VSUS
L
VBB (sink)
0V (source)
15 mH, IO
1.0 A 50
PA
45
V
[Logic Block]
D0 1, D1 1, D2
values are set
1, D3
1 When these data
ICC OFF1
D0
0, D1
0, D3
0
ICC OFF2
ST
LOW
ICC ON
Logic system supply current
Input voltage
Input current
Sense voltages
0, D2
VIH
22
35
46
mA
32
42
mA
0.05
0.1
mA
0.8
V
35
PA
2
V
VIL
IIH
VIH
2V
IIL
VIL
0.8 V
VE
PA
6
D0 1, D1 1, D2
values are set
1, D3
1 When these data
D0
1, D1
1, D2
1, D3
D0
1, D1
1, D2
0, D3
D0
1, D1
1, D2
D0
1, D1
D0
0.470
0.50
0.525
V
0
0.445
0.48
0.505
V
1
0.425
0.46
0.485
V
0, D3
0
0.410
0.43
0.465
V
0, D2
1, D3
1
0.385
0.41
0.435
V
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
D0
0, D1
0, D2
1, D3
0
0.075
0.09
0.100
V
1.2
0.8
mA
Reference current
IREF
VREF
CR pin current
ICR
CR
1.0 V
IMD
MD
1.0 V, CR
MD pin current
24
0.5
1.5 V
1.6
4.0 V
PA
5.0
PA
Logic system on voltage
VLSDON
2.6
2.8
3.0
Logic system off voltage
VLSDOFF
2.45
2.65
2.85
V
VLHIS
0.03
0.15
0.35
V
LVSD hysteresis
Thermal shutdown temperature
Ts
Design guarantee
170
V
qC
No.7946-2/12
LB11946
AC Electrical Characteristics at VCC
Parameter
5V
Symbol
Conditions
Ratings
min
typ
max
Clock frequency
Fclk
VCC
5.0 V
Data setup time
TDS
VCC
5.0 V
0.9
2.5
PS
Data hold time
TDH
VCC
5.0 V
0.9
2.5
PS
Minimum clock high-level pulse width
TSCH
VCC
5.0 V
0.9
2.5
PS
Minimum clock low-level pulse width
TSCL
VCC
5.0 V
0.9
2.5
PS
SET pin stipulated time
Tlat
VCC
5.0 V
0.9
2.5
PS
Tlatw
VCC
5.0 V
1.9
5.0
PS
SET pin signal pulse width
200
550
Unit
kHz
Fclk
TSCH TSCL
CLK
TDS TDH
DATA
D4
D5
D6
D10
D11
Tlat
SET
Tlatw
No.7946-3/12
LB11946
Electrical Characteristics at Ta = 25°C, VCC = 3.3 V, VBB = 42 V, VREF = 1.0 V
(When measuring the sense voltage: VREF = 1.03 V)
Parameter
Symbol
Ratings
Conditions
min
typ
max
Unit
[Output Block]
Output stage supply current
IBB ON
0.9
1.3
1.7
mA
IBB OFF
0.52
0.7
1.05
mA
V
Output saturation voltage 1
VO(sat) 1
IO
0.5 A (sink)
1.2
1.5
Output saturation voltage 2
VO(sat) 2
IO
1.0 A (sink)
1.5
1.8
V
Output saturation voltage 3
VO(sat) 3
IO
0.5 A (source)
2.0
2.3
V
1.0 A (source)
2.3
2.6
V
50
PA
Output saturation voltage 4
Output leakage current
Output sustain voltage
VO(sat) 4
IO
IO1 (leak)
VO
IO2 (leak)
VO
VSUS
L
VBB (sink)
0 V (source)
15 mH IO1.5A 50
PA
45
V
[Logic Block]
D0 1, D1 1, D2 1, D3 1
When these data values are set
21
ICC OFF1
D0
0, D1
19
ICC OFF2
ST
0.8 V
ICC ON
Logic system supply current
Input voltage
Input current
Sense voltages
Reference current
0, D2
39
mA
28
36.5
mA
0.03
0.1
mA
0.8
V
35
PA
2
V
VIL
IIH
VIH
2V
IIL
VIL
0.8 V
D0
1, D1
1, D2
1, D3
1 VREF
1.03 V
0.303
0.330
0.356
V
D0
1, D1
1, D2
1, D3
0 VREF
1.03 V
0.290
0.315
0.341
V
D0
1, D1
1, D2
0, D3
1 VREF
1.03 V
0.276
0.300
0.324
V
D0
1, D1
1, D2
0, D3
0 VREF
1.03 V
0.263
0.286
0.309
V
D0
1, D1
0, D2
1, D3
1 VREF
1.03 V
0.250
0.272
0.294
V
D0
1, D1
0, D2
1, D3
0 VREF
1.03 V
0.236
0.257
0.278
V
D0
1, D1
0, D2
0, D3
1 VREF
1.03 V
0.223
0.243
0.263
V
D0
1, D1
0, D2
0, D3
0 VREF
1.03 V
0.209
0.228
0.247
V
D0
0, D1
1, D2
1, D3
1 VREF
1.03 V
0.183
0.200
0.217
V
D0
0, D1
1, D2
1, D3
0 VREF
1.03 V
0.155
0.170
0.185
V
D0
0, D1
1, D2
0, D3
1 VREF
1.03 V
0.128
0.143
0.158
V
D0
0, D1
1, D2
0, D3
0 VREF
1.03 V
0.102
0.114
0.126
V
D0
0, D1
0, D2
1, D3
1 VREF
1.03 V
0.074
0.085
0.096
V
D0
0, D1
0, D2
1, D3
0 VREF
1.03 V
0.047
0.057
0.067
VE
PA
6
VREF
CR pin current
ICR
CR
1.0 V
MD pin current
IMD
MD
1.0 V, CR
LVSD voltage
VLSDON
Logic system off voltage
Thermal shutdown temperature
0
VIH
IREF
LVSD hysteresis
0, D3
30
0.5
1.0 V
0.7
0.49
2.6
2.8
3.0
VLSDOFF
2.45
2.65
2.85
V
VLHIS
0.03
0.15
0.35
V
Ts
Design guarantee
0.91
V
PA
4.0V
5.0
mA
PA
170
V
qC
No.7946-4/12
LB11946
AC Electrical Characteristics at VCC
Parameter
3.3 V
Symbol
Conditions
Ratings
min
typ
max
Clock frequency
Fclk
VCC
3.3 V
Data setup time
TDS
VCC
3.3 V
0.9
2.5
PS
Data hold time
TDH
VCC
3.3 V
0.9
2.5
PS
Minimum clock high-level pulse width
TSCH
VCC
3.3 V
0.9
2.5
PS
Minimum clock low-level pulse width
TSCL
VCC
3.3 V
0.9
2.5
PS
SET pin stipulated time
Tlat
VCC
3.3 V
0.9
2.5
PS
Tlatw
VCC
3.3 V
1.9
5.0
PS
SET pin signal pulse width
200
550
Unit
kHz
Fclk
TSCH TSCL
CLK
TDS TDH
DATA
D4
D5
D6
D10
D11
Tlat
SET
Tlatw
Package Dimensions
unit: mm
3147C
SANYO : DIP-28H (500mil)
No.7946-5/12
LB11946
VCC
VREF1
NC
CR1
MD
CLK
DATA
SET
ST
NC
CR2
NC
VREF2
GND
Pin Assignment
28
27
26
25
24
23
22
21
20
19
18
17
16
15
1
2
3
4
5
6
7
8
9
10
11
12
13
14
VBB
NC
E1
D-GNDA
NC
OUTA-
OUTA
OUTB-
OUTB
NC
D-GNDB
E2
NC
VBB
LB11946
Note : The D-GNDA and D-GNDB pins are the anode sides of the lower side diodes.
No.7946-6/12
LB11946
Block Diagram
No.7946-7/12
LB11946
Timing Chart
T SCH
C LO C K
T SCL
D AT A
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
SET
Serially Transferred Data Definition
No.
IA4
IA3
IA2
IA1
DE1
PH1
IB4
IB3
IB2
IB1
DE2
PH2
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
Output mode
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.
No.7946-8/12
LB11946
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)
1
1
1
1
11.5/11.5 u VREF/3.04RE
Iout
100
1
1
1
0
11.0/11.5 u VREF/3.04RE
Iout
95.65
1
1
0
1
10.5/11.5 u VREF/3.04RE
Iout
91.30
1
1
0
0
10.0/11.5 u VREF/3.04RE
Iout
1
0
1
1
9.5/11.5 u VREF/3.04RE
Iout
82.61
1
0
1
0
9.0/11.5 u VREF/3.04RE
Iout
78.26
1
0
0
1
8.5/11.5 u VREF/3.04RE
Iout
73.91
1
0
0
0
8.0/11.5 u VREF/3.04RE
Iout
69.56
0
1
1
1
7.0/11.5 u VREF/3.04RE
Iout
60.87
0
1
1
0
6.0/11.5 u VREF/3.04RE
Iout
52.17
0
1
0
1
5.0/11.5 u VREF/3.04RE
Iout
43.48
0
1
0
0
4.0/11.5 u VREF/3.04RE
Iout
34.78
0
0
1
1
3.0/11.5 u VREF/3.04RE
Iout
26.08
0
0
1
0
2.0/11.5 u Vref/3.04RE
Set current Iout
Current ratio (%)
86.95
Iout
17.39
Note : The current ratios shown are calculated values.
Sample Application Circuit at VCC = 5 V
30 k:
10 PF
680 pF
30 k:
1.5 V
5V
680 pF
CR2
GND
SET
VBB
DATA
VREF2
CLK
NC
MD
NC
CR1
15
E2
NC
16
DGNDB
VREF1
17
NC
18
NC
19
ST
20
OUTB
21
OUTB-
22
OUTA
23
OUTA-
24
NC
25
DGNDA
26
E1
27
NC
28
VCC
Logic level inputs
VBB
MD voltage
setting
(1.6 to 3.9 V)
Fast mode:
ground
Slow mode:
VCC
0.1
PF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LB11946
M
0.51 :
0.51 :
42 V
47 PF
No.7946-9/12
LB11946
Sample Application Circuit at VCC = 3.3 V
10 PF
30 k:
3.3 V
680 pF
30 k:
1.0 V
0.1
PF
680 pF
NC
VREF2
GND
E2
NC
VBB
CR2
DGNDB
15
NC
16
NC
17
ST
18
OUTB
SET
19
OUTB-
MD
20
DATA
CR1
21
OUTA
NC
22
CLK
VREF1
23
OUTA-
24
NC
25
DGNDA
26
E1
27
NC
28
VCC
Logic level inputs
VBB
MD voltage
setting
(1.2 to 2.5 V)
Fast mode:
ground
Slow mode: VCC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LB11946
M
0.51 :
0.51 :
42 V
47 PF
No.7946-10/12
LB11946
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.
x When VCC is 5 V
Noise canceller time (Tn)
Tn | CRln{(1.5-RI)/(4.0-RI)}[s]
CR pin charge current: 1.25 mA
Switching off time (Toff)
Toff | CRln (1.5/4.8)[s]
Component value ranges
R: 5.6 k: to 100 k:
C: 470 pF to 2000 pF
x When VCC is 3.3 V
Noise canceller time (Tn)
Tn|CRln {(1.06-RI)/(2.66-RI)}[s]
CR pin charge current: 0.7 mA
Switching off time (Toff)
Toff | CRln (1.06/3.1)[s]
VCC line
One-shot multvibrator blanking time
circuit
CR pin
E1
C: 680pF
R: 30 k:
CR Pin Internal Circuit Structure
Notes on the MD Pin
x 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.
x 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 VCC = 5 V specifications are used the setting voltage range for mixed decay mode is 1.6 to 3.9 V.
When the VCC = 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 VCC to select slow decay mode.
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Usage Notes
x Notes on the VREF pin
Since the VREF pin inputs the reference voltage used to set the current, applications must be designed so that noise
does not occur at this pin.
x 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 VCC and ground and
between VBB and ground must be as close as possible to the corresponding VCC and VBB pin in the pattern.
x Power on sequence
When turning the power systems on
VCC o logic level inputs (CLK, DATA, SET, and ST) o VREF o VBB
When turning the power systems off
VBB o VREF o logic level inputs (CLK, DATA, SET, and ST) o VCC
Note that if the power supply for the logic level inputs is on when the VCC power supply is off, a bias with an
unstable state will be applied due to the protection diodes at the VCC 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
kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits
and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products (including technical data, services) described or contained
herein are controlled under any of applicable local export control laws and regulations, such products
must not be exported without obtaining the export license from the authorities concerned in accordance
with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or
mechanical, including photocopying and recording, or any information storage or retrieval system, of
otherwise, without the prior written permission of SANYO Electric Co., Ltd.
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
the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not
guaranteed for volume production. SANYO believes information herein is accurate and reliable, but no
guarantees are made or implied regarding its use or any infringements of intellectual property rights or
This catalog provides information as of July, 2004. Specifications and information herein are subject to
change without notice.
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