Low-voltage/Low-saturation Bidirectional
Variable Constant-voltage Motor Driver
Overview
The LB1840M is a low-voltage, low-saturation, three-input
type two-channel bidirectional motor driver that permits
switching between constant-voltage regulated output and
saturated output. The design is ideal for a two-phase bipolar
driver for stepping motors.
Features
.
Wide operating voltage range (3.0 to 9.0 V).
.
Low saturation voltage
V
O(sat)
= 0.40 V at I
O
= 200 mA.
.
Consumes almost no current in standby mode
(0.1 A or less).
.
Permits setting of bidirectional constant-voltage regulated
value.
.
Three-input type that is ideal for a two-phase bipolar driver.
.
Permits switching between constant-voltage regulated output
and saturated output.
.
Built in reference voltage coupled to input.
.
Compact MFP-14S package.
Package Dimensions
unit: mm
3111-MFP14S
[LB1840M]
SANYO : MFP14S
Specifications
Absolute Maximum Ratings
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Maximum supply voltage
V
CC
max
10.5
V
Output current
Im max
250
mA
Applied input voltage
V
IN
0.3 to +10
V
Allowable power dissipation
Pd max
With board ( 30
30
1.5 mm
3
)
800
mW
Operating temperature
Topr
20 to +80
C
Storage temperature
Tstg
40 to +150
C
Allowable Operating Ranges
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
3.0 to 9.0
V
IN pin high level voltage
V
INH
3.0 to 9.0
V
IN pin low level voltage
V
INL
0.3 to +0.7
V
Control voltage
V
C
0.2 to 6.0
V
VM pin high level voltage
VM
H
V
CC
0.3 to V
CC
V
VM pin low level voltage
VM
L
0.3 to V
CC
2.5
V
Ordering number: EN4996
Monolithic Digital IC
LB1840M
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
O1596HA(II) No.4996-1/5
Electrical Characteristics
at Ta = 25 C, V
CC
= 6 V
Parameter
Symbol
Conditions
min
typ
max
Unit
Supply current
I
CC
0
During standby
0.1
10
A
I
CC
1
During bidirectional operation (for two channels):
during control, load open
during saturation, load open
3.5
5.0
mA
I
CC
2
4.5
6.5
mA
Output saturation voltage
V
sat1
I
O
= 100 mA (upper side + lower side)
0.30
0.40
V
V
sat2
I
O
= 200 mA (upper side + lower side)
0.40
0.55
V
V
Osat3
I
O
= 200 mA (lower side)
0.07
0.10
0.15
V
Reference voltage
V
ref
I
Vref
= 1 mA
1.85
2.0
2.15
V
Output voltage
voltage characteristics
V
O
V
CC
V
O
= 5 V, V
CC
= 5.5 to 9 V,
I
O
= 100 mA
20
mV
Output voltage
current characteristics
V
O
I
O
V
O
= 5 V, V
CC
= 6 V,
I
O
= 10 to 100 mA
50
mV
Input current
I
IN
V
IN
= 5 V
90
150
A
I
VM
V
M
= GND
210
300
A
Output voltage
V
O
Between OUT and GND
2.45
V
C
2.65
V
C
V
Equivalent Circuit Block Diagram
(For one channel)
Pin Assignment
Thermal
Reference
voltage
Logic predriver
Note: Both GND pins must be grounded.
Top view
LB1840M
No.4996 -2/5
Truth Table
Input
Output
Mode
ENA
IN 1/2
VM
OUT 1/3
OUT 2/4
L
--
--
OFF
OFF
Standby
H
L
H
H
L
Constant-voltage regulated
forward operation
H
L
L
H
L
Saturated
forward operation
H
H
H
L
H
Constant-voltage regulated
reverse operation
H
H
L
L
H
Saturated
reverse operation
The constant-voltage regulated output V
O
(= voltage between H side output and GND) is controlled by V
O
= 2.5
V
C
. The output
is in the saturated state when the V
C
input range is 0.2 to 6 V and V
O
^ V
CC
.
Pin Functions
Pin No.
Symbol
Equivalent Circuit Diagram
Pin Function
14
V
CC
Power supply pin for output and controller.
9
12
GND
GND pins for output and controller.
Both must be grounded.
3
6
IN2
IN1
Input pins that determine the excitation of
the outputs.
IN1 control outputs OUT1 and OUT2;
IN2 control outputs OUT3 and OUT4.
L: 0.3 to +0.7 V or open
H: 3.0 to 9.0 V
There are no limitations on the magnitude
relationships between the V
CC
and V
IN
supply voltages.
8
10
11
13
OUT4
OUT3
OUT1
OUT2
Output pins.
Have built-in spark killer diodes.
4
Vref
Reference voltage (= 2.0 V).
Continued on next page.
LB1840M
No.4996 -3/5
Continued from preceding page.
Pin No.
Symbol
Equivalent Circuit Diagram
Pin Function
5
V
C
Output
Input pins that determine the constant-
voltage regulated output level.
The constant-voltage regulated output V
O
(= voltage between H side output and
GND) is controlled by V
O
= 2.5
V
C
. There
are no limitations on the magnitude
relationships between the V
CC
and V
C
supply voltages.
2
ENA
Standby/drive control input pin.
Current drain in standby mode is 10 A or
less.
L: 0.3 to + 0.7 V or open
H: 3.0 to 9.0 V
There are no limitation on the magnitude
relationships between V
CC
and V
ENA
supply voltage.
7
VM
Control input pin for switching between
constant voltage output and saturated
output.
L: 0.3 to V
CC
- 2.5 V
(saturated output)
H: V
CC
- 0.3 to V
CC
or open
(constant-voltage regulated output)
Sample Application Circuit
If the outputs oscillate, insert capacitors
of 0.001 to 0.1 F between the outputs.
Stepping motor
LB1840M
No.4996 -4/5
No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace equipment,
nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or
indirectly cause injury, death or property loss.
Anyone purchasing any products described or contained herein for an above-mentioned use shall:
1
Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors
and all their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and
expenses associated with such use:
2
Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO
ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally.
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 October, 1996. Specifications and information herein are subject to change without notice.
Specified board (30
30
1.5 mm
3
glass epoxy)
Ambient temperature, Ta -- C
Allowable
power
dissipation,
Pd
max
--
m
W
Output current, I
O
-- mA
Output
saturation
voltage,
V
O
(sat)
--
V
Input voltage, V
IN
-- V
Input
current,
I
IN
--
A
Supply voltage, V
CC
-- V
Output
voltage,
V
O
--V
No load
No load
LB1840M
No.4996 -5/5
PDF 
ZIP