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Ordering number : EN*6183
LB11847
Monolithic Digital IC
LB11847
PWM Current Control Type Stepping Motor Driver
Preliminary
Overview
The LB11847 is a driver IC for stepping motors with PWM current control bipolar drive (fixed OFF time). A special feature of this IC is that VREF voltage is constant while the current can be set in 15 steps, allowing drive of motors ranging from 12 phase exciter types to 4W 1-2 phase exciter types. The current decay pattern can also be selected (SLOW DECAY, FAST DECAY, MIX DECAY) to increase the decay of regenerative current at chopping OFF, thereby improving response characteristics. This is especially useful for carriage and paper feed stepping motors in printers and similar applications where highprecision control and low vibrations are required.
Package Dimensions
unit: mm 3147B-DIP28H
[LB11847]
28 15
R1.7
12.7 11.2
8.4
1
20.0 27.0
14
1.93
1.78
0.6
1.0
4.0
4.0
SANYO : DIP28H
Features
* * * * * * * PWM current control (fixed OFF time) Load current digital selector (1-2, W1-2, 2W1-2, 4W1-2 phase exciter drive possible) Selectable current decay pattern (SLOW DECAY, FAST DECAY, MIX DECAY) Simultaneous ON prevention function (feedthrough current prevention) Noise canceler Built-in thermal shutdown circuit Built-in logic low-voltage OFF circuit
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
61199RM(KI) No. 6183-1/16
0.4
LB11847 Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter Motor supply voltage Output peak current Output continuous current Logic supply voltage Logic input voltage range Emitter output voltage Allowable power dissipation Symbol
VBB IOPEAK IO max VCC VIN VE tW 20 s
Conditions
Ratings 50 1.75 1.5 7.0
-0.3 to VCC
Unit V A A V V V W W C C
1.0 Ta = 25C With heat sink 3.0 20 -20 to +85 -55 to +150
Pd max
Operating temperature Storage temperature
Topr Tstg
Allowable Operating Ranges at Ta = 25C
Parameter Motor supply voltage range Logic supply voltage range Reference voltage range Symbol
VBB VCC VREF
Conditions
Ratings 10 to 45 4.75 to 5.25 0.0 to 3.0
Unit V V V
25
Pd max - Ta
With an arbitrary large heat sink
20.0
Allowable power dissipation, Pd max - W
20
15
10.4 10
5
IC only
0 -20 0 20
3.0 1.56 40 60 80 100
Ambient temperature, Ta - C
No. 6183-2/16
LB11847
Electrical Characteristics at Ta = 25C, VBB = 45V, VCC = 5V, VREF = 1.52V
Parameter [Output Block] Output stage supply voltage
IBB ON IBB OFF
Symbol
Conditions min
Ratings typ max
Unit
2.3 0.5
IO = +1.0A, sink IO = +1.5A, sink IO = -1.0A, source IO = -1.5A, source VO = VBB, sink VO = 0V, source L = 15 mH, IO = 1.5A, Guaranteed design value
3.5 0.8 1.2 1.5 1.9 2.2
5.0 1.1 1.6 1.9 2.2 2.4 50
mA mA V V V V A A V
Output saturation voltage
VO(sat)1 VO(sat)2 VO(sat)3 VO(sat)4
Output leak current
IO(leak)1 IO(leak)2
-50 45
Output sustain voltage [Logic Block] Logic supply voltage
VSUS
ICC ON ICC OFF
I4 = 2.0V, I3 = 2.0V, I2 = 2.0V, I1 = 2.0V
19.5 10.5 2.0
26 15
36.5 19.5
mA mA V
ENABLE = 2.0V
Input voltage
VIH VIL
0.8
VIH = 2.0V VIL = 0.8V I4 = 2.0V, I3 = 2.0V, I2 = 2.0V, I1 = 2.0V I4 = 2.0V, I3 = 2.0V, I2 = 2.0V, I1 = 0.8V I4 = 2.0V, I3 = 2.0V, I2 = 0.8V, I1 = 2.0V I4 = 2.0V, I3 = 2.0V, I2 = 0.8V, I1 = 0.8V I4 = 2.0V, I3 = 0.8V, I2 = 2.0V, I1 = 2.0V I4 = 2.0V, I3 = 0.8V, I2 = 2.0V, I1 = 0.8V I4 = 2.0V, I3 = 0.8V, I2 = 0.8V, I1 = 2.0V I4 = 2.0V, I3 = 0.8V, I2 = 0.8V, I1 = 0.8V I4 = 0.8V, I3 = 2.0V, I2 = 2.0V, I1 = 2.0V I4 = 0.8V, I3 = 2.0V, I2 = 2.0V, I1 = 0.8V I4 = 0.8V, I3 = 2.0V, I2 = 0.8V, I1 = 2.0V I4 = 0.8V, I3 = 2.0V, I2 = 0.8V, I1 = 0.8V I4 = 0.8V, I3 = 0.8V, I2 = 2.0V, I1 = 2.0V I4 = 0.8V, I3 = 0.8V, I2 = 2.0V, I1 = 0.8V
V A A
Input current
IIH IIL
100 -10 0.470 0.445 0.425 0.410 0.385 0.365 0.345 0.325 0.280 0.240 0.195 0.155 0.115 0.075 -0.5 -4.6 -5.0 -10 5 170 3.35 3.20 0.065 3.65 3.50 0.15 3.95 3.80 0.23 -1.0 0.50 0.48 0.46 0.43 0.41 0.39 0.37 0.35 0.30 0.3 0.26 0.22 0.17 0.13 0.09 0.525 0.505 0.485 0.465 0.435 0.415 0.385 0.365 0.325 0.285 0.235 0.190 0.190 0.145 0.100
Sensing voltage
VE
V V V V V V V V V V V V V V A mA A A A C V V V
Reference current CR pin current MD pin current DECAY pin current Low DECAY pin current High Thermal shutdown temperature Logic ON voltage Logic OFF voltage
LVSD hysteresis width
IREF ICR IMD IDECL IDECH
VREF = 1.5V
CR = 1.0V MD = 1.0V, CR = 4.0V
VDEC = 0.8V VDEC = 2.0V
TSD
LVSD1 LVSD2 LVSD
No. 6183-3/16
LB11847
Truth Table
PHASE H L ENABLE L L H
OUTA
H L OFF
OUTA
L H OFF
Set Current Truth Table
IA4 IA3 IA2 IA1
Set current IOUT 11.5/11.5 x VREF/3.04RE = IOUT 11.0/11.5 x VREF/3.04RE = IOUT 10.5/11.5 x VREF/3.04RE = IOUT 10.0/11.5 x VREF/3.04RE = IOUT 9.5/11.5 x VREF/3.04RE = IOUT 9.0/11.5 x VREF/3.04RE = IOUT 8.5/11.5 x VREF/3.04RE = IOUT 8.0/11.5 x VREF/3.04RE = IOUT 7.0/11.5 x VREF/3.04RE = IOUT 6.0/11.5 x VREF/3.04RE = IOUT 5.0/11.5 x VREF/3.04RE = IOUT 4.0/11.5 x VREF/3.04RE = IOUT 3.0/11.5 x VREF/3.04RE = IOUT 2.0/11.5 x VREF/3.04RE = IOUT
Current ratio (%) 100 95.65 91.30 86.95 82.61 78.26 73.91 69.56 60.87 52.17 43.48 34.78 26.08 17.39
1 1 1 1 1 1 1 1 0 0 0 0 0 0
1 1 1 1 0 0 0 0 1 1 1 1 0 0
1 1 0 0 1 1 0 0 1 1 0 0 1 1
1 0 1 0 1 0 1 0 1 0 1 0 1 0
* Current ratio (%) is the calculated set current value.
Current Decay Switching Truth Table
Current decay mode SLOW DECAY FAST DECAY MIX DECAY DECAY pin H L L MD pin L L 4V to 1.5V input voltage setting Output chopping Upper-side chopping Dual-side chopping CR voltage > MD : dual-side chopping CR voltage < MD : upper-side chopping
No. 6183-4/16
LB11847 Pin Function
Pin number
1 2 13 3 12 4 11 5 10
Pin name
MD
VREF1 VREF2
Function description
Sets the OFF time for FAST mode and SLOW mode in MIX DECAY Setting input range: 4V to 1.5V Output set current reference supply pins Setting voltage range: 0V to 3V Output OFF time setting pins for switching operation
CR1 CR2 E1 E2 DECAY1 DECAY2
Pins for controlling the set current with sensing resistor RE SLOW mode/FAST mode selector pins SLOW DECAY: H FAST DECAY: L
6 7 8 9 14 15 27 16 26 17 22, 23 24, 25 21, 20 19, 18 28
OUTA OUTA OUTB OUTB VBB
Output pins
Output stage supply voltage pin Ground pin Output phase selector input pins
GND PHASE1 PHASE2 ENABLE1 ENABLE2
IA4, IA3 IA2, IA1 IB4, IB3 IB2, IB1 VCC
Output ON/OFF setting input pins
Output set current digital input pins 15-stage voltage setting
Logic block supply voltage pin
ENABLE1
ENABLE2
Pin Assignment
PHASE1 VCC
PHASE2
28
27
26
25
24
23
22
21
20
19
18
17
16
15
LB11847
1
MD
2
VREF1
3
CR1
4
E1
5
DECAY1
6
OUTA
7
OUTA
8
OUTB
9
OUTB
10
DECAY2
11
E2
12
CR2
13
VREF2
14
VBB
GND
IA1
IA2
IA3
IA4
IB4
IB3
IB2
IB1
Top view
A12533
No. 6183-5/16
Block Diagram
OUTA
OUTA
VBB
OUTB
OUTB
VCC
MD PHASE2
Control logic circuit
PHASE1
DECAY1
Control logic circuit
DECAY2 ENABLE2
ENABLE1
IA1
I B1
IA2
IB2 IB3 IB4 Thermal shutdown circuit VREF2 Current selector circuit Current selector circuit One-shot multiblanking time One-shot multiblanking time
I A3
LB11847
IA4
VREF1
GND
CR1 E1
E2
CR2
A12534
No. 6183-6/16
LB11847
Sequence Table
Phase A No. IA4 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 Phase B Phase 1-2 Phase W1-2
Phase 2W1-2
Phase 4W1-2

IA3 IA2 IA1 ENA1 PHA1 IOUT
1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 100% 100 100 96.65 91.30 86.95 82.61 78.26 73.91 69.56 60.87 52.17 43.48 34.78 26.08 17.39 0 17.39 26.08 34.78 43.48 52.17 60.87 69.56 73.91 78.26 82.61 86.95 91.30 95.65 100 100
IB4 IB3 IB2 IB1 ENA2 PHA2 IOUT
0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 1 1 1 1 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 0 0 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 1 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 1 0 1 0 1 0 1 1 1 1 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
*
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0% 17.39 26.08 34.78 43.48 52.17 60.87 69.56 73.91 78.26 82.61 86.95 91.30 96.65 100 100 100 100 100 95.65 91.30 86.95 82.61 78.26 73.91 69.56 60.87 52.17 43.48 34.78 26.08 17.39

*
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1

* : Iout percentage (%) is the calculated setting value.
No. 6183-7/16
LB11847 Switch Timing Chart during PWM Drive
SLOW DECAY(upper-side chopping) DECAY pin : High MD pin : Low
E pin
Output pin
tn
CR pin
Output pin
Switching waveform
A12535
FAST DECAY DECAY pin : High
MD pin : Low
Noise spike
E pin
Output pin
CR pin
Output pin
Switching waveform
A12536
No. 6183-8/16
LB11847
MIX DECAY Noise spike tm
E pin
Output pin tn
CR pin ton
Output pin
toff
Switching waveform
A12537
ton toff tm tn
: : : :
Output ON time Output OFF time FAST DECAY time in MIX DECAY mode Noise cancelling time
MIX DECAY logic setting
DECAY pin : L MD pin : 1.5V to 4.0V voltage setting CR voltage and MD pin voltage are compared to select dual-side chopping or upper-side chopping. CR voltage > MD pin voltage: dual-side chopping CR voltage < MD pin voltage: top-side choppinng
No. 6183-9/16
LB11847
SLOW DECAY current path Regenerative current during upper-side transistor switching operation
ON Current path at output ON OFF Regenerative circuit when upper-side transistor is OFF OUTA SBD ON Constant SBD OUTA
VBB
Sensing voltage comparator
Re
A12538
Current path in FAST DECAY mode
VBB ON Current path at output ON OFF Current path in FAST DECAY mode OUTA SBD OUTA
SBD
ON OFF Sensing voltage comparator
Re
A12539
No. 6183-10/16
LB11847
Composite Vectors of Set Current (1 step normalized to 90)
Phase B I OUT 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2
1 Sequence No.
0 I OUT Phase A
No. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Rotation angles 0 9.87 14.6 20.0 25.5 30.96 36.38 41.63 45.0 48.37 53.62 59.04 64.5 70.0 75.4 80.13 90.0
Composite vectors 100.0 101.5 103.35 101.78 101.12 101.4 102.61 104.7 104.5 104.7 102.61 101.4 101.12 101.78 103.35 101.5 100.0
A12540
* Rotation angle and composite spectrum are calculated values.
No. 6183-11/16
LB11847
Set Current Waveform Model
Phase A
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
I OUT
Phase B
I OUT
PHASE1
PHASE2
A12541
No. 6183-12/16
LB11847
Sample Application Circuit
10 F
5V Logic input
28
27
26
25
24
23
22
21
20
19
18
17
16
15
ENABLE1
ENABLE2
PHASE1
PHASE2 VREF2
13
LB11847
DECAY1 VREF1 OUTA DECAY2 OUTA OUTB OUTB CR1 CR2 VBB
14 42V 47 F 1.5V 15 k 470 pF 0.51 0.51 15 k 470 pF
MD
1
2
3
4
E1
5
6
7
8
9
10
11
E2
12
1.5V to 4.0V voltage setting SBD
L
L
SBD SBD SBD
GND
VCC
IA1
IA2
IA3
IA4
IB4
IB3
IB2
IB1
A12542
Notes on Usage 1. External diodes Because this IC uses upper-side transistor switching in SLOW DECAY mode and dual-side transistor switching in FAST DECAY mode, it requires external diodes between the OUT pins and ground for the regenerative current during switching OFF. Use Schottky barrier diodes with low VF. 2. VREF pin Because the VREF pin serves for input of the set current reference voltage, precautions against noise must be taken. The input voltage range is 0 to 3.0V. 3. GND pin The ground circuit for this IC must be designed so as to allow for high-current switching. Blocks where high current flows must use low-impedance patterns and must be removed from small-signal lines. Especially the ground connection for the sensing resistor RE at pin E, and the ground connection for the Schottky barrier diodes should be in close proximity to the IC ground. The capacitors between VCC and ground, and VBB and ground should be placed close to the VCC and VBB pins, respectively.
No. 6183-13/16
LB11847
4. Simultaneous ON prevention function This IC incorporates a circuit to prevent feedthrough current when phase switching. For reference, the output ON and OFF delay times at PHASE and ENABLE switching are given below. Reference data * typical value
Sink side PHASE switching (Low -> High) PHASE switching (High -> Low) ENABLE switching ON delay time OFF delay time ON delay time OFF delay time ON delay time OFF delay time 1.9 s 0.8 s 1.4 s 0.9 s 2.15 s 1.2 s Source side 2.2 s 1.8 s 1.7 s 1.35 s 2.75 s 5.8 s
5. Noise canceler This IC has a noise canceling function to prevent malfunction due to noise spikes generated when switching ON. The noise cancel time tn is determined by internal resistance of the CR pin and the constant of the externally connected CR components. The constant also determines the switching OFF time. Figure 1 shows the internal configuration at the CR pin, and Figure 2 shows the CR pin constant setting range. Equation when logic voltage VCC = 5 V CR pin voltage E1 = VCC * R/(R1+R2+R) [V] Noise cancel time tn .. (R1+R2) * C * 1n {(E1-1.5)/(E1-4.0)} = Switching OFF time toff .. -R * C * 1n (1.5/E1) [s] = Internal resistance at CR pin : R1 = 1 k, R2 = 300 (typ.)
[s]
*The CR constant setting range in Figure 2 on page 15 is given for reference. It applies to a switching OFF time in the range from 8 to 100 s. The switching time can also be made higher than 100 s. However, a capacitor value of more than several thousand pF will result in longer noise canceling time, which can cause the output current to become higher than the set current. The longer switching OFF time results in higher output current ripple, causing a drop in average current and rotation efficiency. When keeping the switching OFF time within 100 s, it is recommended to stay within the CR constant range shown in Figure 2.
Internal configuration at CR pin
VCC line
One-shot multi-blanking time circuit R1 R2 300 1 k
CR pin E1
C:470 pF
R:15 k
Figure 1
A12543
No. 6183-14/16
LB11847
Switching OFF Time and CR Setting Range (toff time : approx. 8 to 100 s)
C [pF]
3000
toff time : 30 s 2000
toff time : 50 s
toff time : 100 s
1000
50k
100k
R []
A12544
Figure 2
No. 6183-15/16
LB11847
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, or 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 other rights of third parties.
This catalog provides information as of June, 1999. Specifications and information herein are subject to change without notice. PS No. 6183-16/16

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