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PDF LB1847 Data sheet ( Hoja de datos )
| Número de pieza | LB1847 | |
| Descripción | PWM Current Control Type Stepping Motor Driver | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LB1847 (archivo pdf) en la parte inferior de esta página. Total 16 Páginas | ||
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Ordering number : EN5982
LB1847
Monolithic Digital IC
LB1847
PWM Current Control Type Stepping Motor Driver
Overview
The LB1847 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 1-
2 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 high-
precision control and low vibrations are required.
Package Dimensions
unit: mm
3147B-DIP28H
[LB1847]
28 15
R1.7
1
20.0
27.0
14
1.93
1.78
0.6 1.0
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 Business Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
11499RM(KI) No. 5982-1/16
1 page  
LB1847
Pin function
Pin number Pin name
1 MD
2 VREF1
13 VREF2
3 CR1
12 CR2
4 E1
11 E2
5 DECAY1
10 DECAY2
6
7
8
9
14
15
27
16
26
17
22, 23
24, 25
21, 20
19, 18
28
OUTA
OUTA
OUTB
OUTB
VBB
GND
PHASE1
PHASE2
ENABLE1
ENABLE2
IA4, IA3
IA2, IA1
IB4, IB3
IB2, IB1
VCC
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 pin
Setting voltage range: 0V to 3V
Output OFF time setting pin for switching operation
Pin for controlling the set current with sensing resistor RE
SLOW mode/FAST mode selector pin
SLOW DECAY: H
FAST DECAY: L
Output pin
Output stage supply voltage pin
Ground pin
Output phase selector input pin
Output ON/OFF setting input pin
Output set current digital input pin
15-stage voltage setting
Logic block supply voltage pin
Pin Assignment
28 27 26 25 24 23 22 21 20 19 18 17 16 15
LB1847
1 2 3 4 5 6 7 8 9 10 11 12 13 14
Top view
A11312
No. 5982-5/16
5 Page 
LB1847
Composite spectrum 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. θ Rotation angle Composite spectrum
A11318
0 θ0
0°
100.0
1 θ1
9.87°
101.5
2 θ2
14.6°
103.35
3 θ3
20.0°
101.78
4 θ4
25.5°
101.12
5 θ5
30.96°
101.4
6 θ6
36.38°
102.61
7 θ7
41.63°
104.7
8 θ8
45.0°
104.5
9 θ9
48.37°
104.7
10 θ10
53.62°
102.61
11 θ11
59.04°
101.4
12 θ12
64.5°
101.12
13 θ13
70.0°
101.78
14 θ14
75.4°
103.35
15 θ15
80.13°
101.5
16 θ16
90.0°
100.0
* Rotation angle and composite spectrum are calculated values.
No. 5982-11/16
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet LB1847.PDF ] | |
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