Document Outline
- LA6511
- LA6524
- LA6530M
- LA6537M
- LA7578N
- LA7583
- LA7625, 7626
- LA7832
- LA7833
- LA8608V
- LB1640N
-
- LB1839M
Low-voltage/Low-saturation Bidirectional
Constant-Voltage Regulated Motor Driver
Overview
The LB1837M is a low-voltage, low-saturation, two-channel
motor driver with a bidirectional braking function that provides
constant-voltage regulated output for bidirectional operation.
The design of the LB1837M is ideal for video equipment,
cameras, and other portable equipment.
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.
.
Built-in reference voltage coupled to input.
.
Brake function built in.
.
Compact MFP14S package.
Package Dimensions
unit: mm
3111-MFP14S
[LB1837M]
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 x 30 x 1.5 mm
3
)
800
mW
Operating temperature
Topr
20 to +80
C
Storage temperature
Tstg
40 to +125
C
Allowable Operating Ranges
at Ta = 25 C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
V
CC
3.0 to 9.0
V
Input [H] voltage
V
IH
3.0 to 9.0
V
Input [L] voltage
V
IL
0.3 to +0.7
V
Control voltage
V
C
0.2 to 6.0
V
Ordering number: EN3948B
Monolithic Digital IC
LB1837M
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
61295HA(II) No.3948-1/5
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
(For one channel) During bidirectional operation
during control, load open
2
3
mA
I
CC
2
(For one channel) During bidirectional operation
during saturation, load open
3
5
mA
I
CC
3
During braking (for one channel)
6.5
9
mA
Output saturation voltage
Vsat1
I
O
= 100 mA (upper side + lower side)
0.3
0.4
V
Vsat2
I
O
= 200 mA (upper side + lower side)
0.4
0.55
V
Vsat3
I
O
= 200 mA (lower side)
0.07
0.10
0.15
V
Reference voltage
Vref
Ivref = 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
CC
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
Output voltage
V
O
Between OUT and GND
2.5 x V
C
2.7 x V
C
V
Equivalent Circuit Block Diagram
(For one channel)
Truth Table
Input
Output
Mode
IN 1/3
IN 2/4
OUT 1/3
OUT 2/4
L
L
OFF
OFF
Standby
H
L
H
L
Constant-voltage
regulated forward
operation
L
H
L
H
Constant-voltage
regulated reverse
operation
H
H
L
L
Brake
The constant-voltage regulated output V
O
(= voltage between H
side output and GND) is controlled by 2.5
x
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 Assignment
Thermal
Reference
voltage
Logic predriver
Note: Both GND pins must be grounded.
LB1837M
No.3948 -2/5
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.
1
2
6
7
IN2
IN1
IN3
IN4
Input pins that determine the excitation of
the outputs.
IN1 and IN2 control outputs OUT1 and
OUT2; IN3 and IN4 control outputs OUT3
and OUT4.
When inputs IN1 through IN4 are all low or
open, the device goes into standby mode
and current consumption drops to 10 A or
less.
L: 0.3 to +0.7 V
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. Braking
provides short braking that turns on the
lower transistor.
3
Vref
Reference voltage (= 2.0 V).
4
5
V
C
1
V
C
2
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 x V
C
. There
are no limitations on the magnitude
relationships between the V
CC
, V
C
1 and
V
C
2 supply voltages.
LB1837M
No.3948 -3/5
Sample Application Circuit
If the outputs oscillate, insert
capacitors of 0.001 to 0.1 F
between the outputs.
V
O
(sat) -- I
O
Specified board (30 x 30 x 1.3 mm
3
glass epoxy)
Ambient temperature, Ta -- C
Allowable
power
dissipation,
Pd
max
--
m
W
Pd max -- Ta
Output current, I
O
-- mA
Output
saturation
voltage,
V
O
(sat)
--
V
I
IN
-- V
IN
Input voltage, V
IN
-- V
Input
current,
I
IN
--
A
V -- V
CC
Supply voltage, V
CC
-- V
Output
voltage,
V
O
--V
No load
No load
LB1837M
No.3948 -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 June, 1995. Specifications and information herein are subject to change without notice.
LB1837M
No.3948 -5/5
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