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Ordering number: EN3948B
Monolithic Digital IC
LB1837M
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
(sat) = 0.40 V at IO= 200 mA.
O
.
Consumes almost no current in standby mode
(0.1 µA or less).
.
Permits setting of bidirectional constant-voltage regulated
value.
.
Built-in reference voltage coupled to input.
.
Brake function built in.
.
Compact MFP14S package.
Specifications
Package Dimensions
unit: mm
3111-MFP14S
[LB1837M]
SANYO : MFP14S
Absolute Maximum Ratings atTa=25°C
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
Output current Im max 250 mA
Applied input voltage V
Allowable power dissipation Pd max With board ( 30 x 30 x 1.5 mm
Operating temperature Topr –20 to +80
Storage temperature Tstg –40 to +125
max 10.5 V
CC
IN
3
) 800 mW
–0.3 to +10 V
Allowable Operating Ranges atTa=25°C
Parameter Symbol Conditions Ratings Unit
Supply voltage V
Input [H] voltage V
Input [L] voltage V
Control voltage V
CC
IH
IL
C
3.0 to 9.0 V
3.0 to 9.0 V
–0.3 to +0.7 V
0.2 to 6.0 V
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
C
°
C
°
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LB1837M
Electrical Characteristics atTa=25°C, VCC=6V
Parameter Symbol Conditions min typ max Unit
Supply current I
Output saturation voltage Vsat1 I
Reference voltage Vref Ivref=1mA 1.85 2.0 2.15 V
Output voltage
voltage characteristics
Output voltage
current characteristics
Input current I
Output voltage V
Equivalent Circuit Block Diagram
(For one channel)
0 During standby 0.1 10 µA
CC
I
CC
I
CC
I
CC
Vsat2 I
Vsat3 I
∆V
∆V
∆V
∆I
CC
IN
(For one channel) During bidirectional operation
1
(For one channel) During bidirectional operation
2
3 During braking (for one channel) 6.5 9 mA
= 100 mA (upper side + lower side) 0.3 0.4 V
O
= 200 mA (upper side + lower side) 0.4 0.55 V
O
= 200 mA (lower side) 0.07 0.10 0.15 V
O
VO=5V,VCC= 5.5 to 9 V,
O
I
= 100 mA
CC
O
O
VO=5V,VCC=6V,
O
I
=10to100mA
O
VIN= 5 V 90 150 µA
Between OUT and GND
during control, load open
during saturation, load open
2.5xV
23mA
35mA
C
2.7xVCV
20 mV
50 mV
Thermal
Reference
voltage
Logic predriver
Truth Table
Input Output
IN 1/3 IN 2/4 OUT 1/3 OUT 2/4
L L OFF OFF Standby
HLHL
LHLH
H H L L Brake
Pin Assignment
Mode
Constant-voltage
regulated forward
operation
Constant-voltage
regulated reverse
operation
The constant-voltage regulated output VO(= voltage between H
side output and GND) is controlled by 2.5 x V
in the saturated state when the V
V
^ VCC.
O
input range is 0.2 to 6 V and
C
. The output is
C
Note: Both GND pins must be grounded.
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Pin Functions
Pin
Symbol Equivalent Circuit Diagram Pin Function
No.
14 V
9
12
1
2
6
7
8
10
11
13
CC
GND GND pins for output and controller. Both
IN2
IN1
IN3
IN4
OUT4
OUT3
OUT1
OUT2
LB1837M
Power supply pin for output and controller.
must be grounded.
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 µA 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
supply voltages.
CC
and V
IN
Output pins.
Have built-in spark killer diodes. Braking
provides short braking that turns on the
lower transistor.
3 Vref
4
5
V
C
V
C
Reference voltage (= 2.0 V).
1
2
Output
Input pins that determine the constantvoltage regulated output level.
The constant-voltage regulated output V
(= voltage between H side output and
GND) is controlled by V
are no limitations on the magnitude
relationships between the V
V
2 supply voltages.
C
=2.5xVC. There
O
1 and
CC,VC
O
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Sample Application Circuit
LB1837M
If the outputs oscillate, insert
capacitors of 0.001 to 0.1 µF
between the outputs.
Pd max — Ta
Specified board (30 x 30 x 1.3 mm3glass epoxy)
Allowable power dissipation, Pd max — mW
Ambient temperature, Ta —°C
IIN—V
—µA
IN
V
(sat) — I
O
(sat) — V
O
Output saturation voltage, V
Output current, IO—mA
IN
V—V
O
CC
No load
—V
O
Input current, I
Output voltage, V
No load
Input voltage, V
IN
—V
Supply voltage, VCC—V
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LB1837M
No products described or contained herein areintendedforuse 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.
No.3948 -5/5
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