1848M [SANYO]
Low-Voltage/Low Saturation Voltage Type Bidirectional Motor Driver; 低电压/低饱和电压型双向电机驱动器
| 型号： | 1848M |
| 厂家： | 
SANYO SEMICON DEVICE |
| 描述： | Low-Voltage/Low Saturation Voltage Type Bidirectional Motor Driver |
| 文件： | 总8页 (文件大小：139K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Ordering number : ENN5339A
Monolithic Digital IC
LB1846M, 1848M
Low-Voltage/Low Saturation Voltage Type
Bidirectional Motor Driver
• Standby current: zero
• Thermal shutdown circuit
Overview
The LB1846M and LB1848M are 2-channel low-voltage,
low saturation voltage type bidirectional motor driver ICs
that are optimal for use as 2-phase stepping motor drivers
in printers, floppy disk drives, and cameras and other
portable equipment. The output circuits are of the bipolar
type, with pnp transistors in the upper side and npn
transistors in the lower side, and they achieve low
saturation output and low power characteristics despite
being provided in a miniature package.
• Miniature package: MFP-10S (6.5 × 5.1 mm2)
• Through-current prevention circuit (LB1848M only)
• “Soft off” function that reduces power supply line noise
when switching from drive to standby modes. (Requires
the use of one external capacitor.) (LB1848M only)
• No limitations on the magnitude relationship between
the power supply voltage (V ) and the input voltage
CC
(V )
IN
Package Dimensions
unit: mm
Both of these IC products can directly control a motor
from signals from a microcontroller. The LB1846M is
optimal for 1-2 phase excitation drive for 2-phase stepping
motors using 4-input logic (IN1, IN2, IN3, and IN4) and
the LB1848M is optimal for 2-phase excitation drive for
2-phase stepping motors using 3-input logic (ENA, IN1,
and IN2).
3086A-MFP10S
[LB1846M, 1848M]
10
6
Another point is that these ICs include built-in thermal
shutdown circuits so that IC scorching or burning is
prevented in advance even if the IC outputs are shorted.
Additionally, the MFP-10S miniature package used
supports reduced-space mounting.
5
1
0.15
5.1
Features
• Optimal for 1-2 phase excitation drive for 2-phase
stepping motors (LB1846M)
0.35
1.0 0.55
SANYO: MFP10S
• Optimal for 2 phase excitation drive for 2-phase
stepping motors (LB1848M)
• Low saturation voltage. V (sat) = 0.55 V typical at I =
O
O
400 mA
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.
http://semicon.sanyo.com/en/network
73099TH (OT)/O3096HA (OT) No. 5339-1/8
LB1846M, 1848M
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Symbol
Conditions
Ratings
Unit
V
V
max
–0.3 to +8.0
CC
V
Output voltage
V
+ V
SF
V
OUT
CC
Input voltage
V
–0.3 to +8.0
800
V
IN
Ground pin outflow current
I
Per channel
mA
mW
mW
°C
°C
GND
Pd max1
Pd max2
Topr
Independent IC
When mounted*
350
Allowable power dissipation
870
Operating temperature
Storage temperature
–20 to +75
–40 to +150
Tstg
3
Note: *On the specified circuit board (a 114.3 × 76.2 × 1.5-mm glass-epoxy printed circuit board)
Allowable Operating Ranges at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
2.5 to 7.5
2.0 to 7.5
–0.3 to +0.7
Unit
V
Supply voltage
V
CC
Input high-level voltage
Input low-level voltage
V
V
IH
V
IL
V
Electrical Characteristics at Ta = 25°C, V = 5.0 V
CC
Ratings
typ
Parameter
Symbol
Conditions
Unit
min
max
[LB1846M]
I
I
0
1
IN1, 2, 3, 4 = 0 V
IN1, 3 = 3 V, IN2, 4 = 0 V
0.1
10
µA
CC
CC
Current drain
30
40
mA
V
I
= 3 V or 0 V, V
= 200 mA
= 3 to 7.5 V,
IN
CC
V
V
1
0.27
0.4
V
OUT
OUT
OUT
Output saturation voltage
V
= 3 V or 0 V, V
= 4 to 7.5 V,
IN
CC
2
0.55
150
0.8
V
I
= 400 mA
= 5 V
IN
OUT
Input current
I
V
200
µA
IN
[Spark Killer Diode]
Reverse current
Forward voltage
[LB1848M]
I (leak)
S
30
µA
V
V
I
= 400 mA
1.7
SF
OUT
I
I
0
1
ENA = 0 V, V = 3 V or 0 V
IN
0.1
25
10
35
µA
CC
CC
Current drain
ENA = 3 V, V = 3 V or 0 V
IN
mA
ENA = 3 V, V = 3 V or 0 V,
IN
V
V
1
0.27
0.55
0.4
0.8
V
V
OUT
OUT
V
= 3 to 7.5 V, I
= 200 mA
CC
OUT
Output saturation voltage
ENA = 3 V, V = 3 V or 0 V,
IN
2
V
= 4 to 7.5 V, I
= 400 mA
CC
OUT
Input current 1
I
V
= 5 V
IN
75
85
100
110
µA
µA
IN
Input current 2
I
ENA = 5 V
ENA
[Spark Killer Diode]
Reverse current
Forward voltage
I (leak)
S
30
µA
V
V
I
= 400 mA
OUT
1.7
SF
Note: The thermal shutdown circuit function values are design guarantees, and are not tested.
No. 5339-2/8
LB1846M, 1848M
Pin Assignments
No. 5339-3/8
LB1846M, 1848M
Block Diagrams
[LB1846M]
[LB1848M]
Note: When the “soft off” function is used, a capacitor must be connected to the SOF pin. If this function is not used, this pin must be left open with absolutely
no signals or lines connected.
Notes on Wiring and Lines
Since large currents flow in the V and ground lines, oscillations may occur on these lines. The following points
CC
should be observed if such oscillations occur.
(1) Lower the line impedances by making them shorter and thicker.
(2) Attach capacitors close to the IC.
(3) If the controller (CPU) is mounted on a separate printed circuit board, insert series resistors (of about 10 kΩ)
between the controller outputs and this IC.
No. 5339-4/8
LB1846M, 1848M
Truth Tables
[LB1846M]
IN1
L
IN2
L
IN3
L
IN4
L
OUT1
OFF
H
OUT2
OFF
L
OUT3
OFF
OFF
H
OUT4
OFF
OFF
L
Notes
Standby
H
H
L
L
L
L
L
H
H
H
L
L
H
L
L
L
OFF
L
OFF
H
H
L
L
H
H
H
L
L
H
L
1-2 phase excitation
L
L
L
H
OFF
L
OFF
H
L
L
H
H
H
—
H
L
H
L
L
OFF
H
OFF
L
L
H
H
H
—
L
L
L
H
H
—
—
H
The logic output for the first high-level
input is produced. *2
Note: 1. “—” indicates a “don’t care” input.
2. If two high levels (H/H) are input to the IN1/IN2 pins with the timing shown in ① in the figure below, then the IN2 input that arrived later will be
ignored and the IC will function as though an H/L combination is applied to the IN1/IN2 pins. Similarly, the timing shown in ➁ results in a L/H
combination on the IN1/IN2 pins.
[LB1848M]
ENA
L
IN1
—
L
IN2
—
L
OUT1
OUT2
OUT3
OUT4
Notes
OFF
H
OFF
L
OFF
H
OFF
L
Standby
L
H
H
L
L
H
H
2-phase excitation
H
H
L
H
L
H
H
L
L
H
H
L
Note: “—” indicates a “don’t care” input.
No. 5339-5/8
LB1846M, 1848M
SOF Pin (“Soft Off” Function) Operation [LB1848M only]
The soft off function reduces power supply line noise due to the kickback current generated when the stepping motor
drive mode is switched from drive to standby. The “soft off” function provided by this IC operates when a capacitor
(0.001 to 0.01 µF) is connected between the SOF pin and ground. (Leave the SOF pin open to disable the soft off
function.)
The waveforms for each pin are shown below.
Timing Chart for Stepping Motor 2-Phase Excitation
No. 5339-6/8
LB1846M, 1848M
No. 5339-7/8
LB1846M, 1848M
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 July, 1999. Specifications and information herein are subject to
change without notice.
PS No. 5539-8/8
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