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Ordering number: EN4996
Monolithic Digital IC
LB1840M
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
= 0.40 V at IO= 200 mA.
O(sat)
.
Consumes almost no current in standby mode
(0.1 µA 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.
Specifications
Package Dimensions
unit: mm
3111-MFP14S
[LB1840M]
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 × 30 × 1.5 mm
Operating temperature Topr –20 to +80 °C
Storage temperature Tstg –40 to +150 °C
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
IN pin high level voltage V
IN pin low level voltage V
Control voltage V
VM pin high level voltage VM
VM pin low level voltage VM
CC
INH
INL
C
H
L
3.0 to 9.0 V
3.0 to 9.0 V
–0.3 to +0.7 V
0.2 to 6.0 V
VCC– 0.3 to V
–0.3 to VCC–2.5 V
CC
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O1596HA(II) No.4996-1/5
V
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LB1840M
Electrical Characteristics at Ta = 25 °C, VCC=6V
Parameter Symbol Conditions min typ max Unit
Supply current I
Output saturation voltage V
Reference voltage V
Output voltage
voltage characteristics
Output voltage
current characteristics
Input current
Output voltage V
Equivalent Circuit Block Diagram
0 During standby 0.1 10 µA
CC
During bidirectional operation (for two channels):
I
1
CC
during control, load open
I
2 4.5 6.5 mA
during saturation, load open
CC
sat1IO
V
sat2IO
V
Osat3IO
refIVref
∆V
∆V
CC
∆V
∆I
O
I
IN
I
VM
O
= 100 mA (upper side + lower side) 0.30 0.40 V
= 200 mA (upper side + lower side) 0.40 0.55 V
= 200 mA (lower side) 0.07 0.10 0.15 V
= 1 mA 1.85 2.0 2.15 V
VO=5V,VCC= 5.5 to 9 V,
O
I
= 100 mA
O
VO=5V,VCC=6V,
O
I
=10to100mA
O
VIN= 5 V 90 150 µA
VM= GND 210 300 µA
Between OUT and GND
2.45 × V
3.5 5.0 mA
C
2.65 × V
20 mV
50 mV
V
C
(For one channel)
Thermal
Reference
voltage
Pin Assignment
Logic predriver
Note: Both GND pins must be grounded.
Top view
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Truth Table
LB1840M
Input Output
ENA IN 1/2 VM OUT 1/3 OUT 2/4
L — — OFF OFF Standby
HLHHL
HLLHL
HHHLH
HHL LH
Constant-voltage regulated
forward operation
Saturated
forward operation
Constant-voltage regulated
reverse operation
Saturated
reverse operation
Mode
The constant-voltage regulated output VO(= voltage between H side output and GND) is controlled by VO= 2.5 × VC. The output
is in the saturated state when the V
input range is 0.2 to 6 V and VO^ VCC.
C
Pin Functions
Pin No.
Symbol Equivalent Circuit Diagram Pin Function
14 V
9
12
3
6
CC
GND GND pins for output and controller.
IN2
IN1
Power supply pin for output and controller.
Both must be grounded.
Input pins that determine the excitation of
the outputs.
IN1 control outputs OUT1 and OUT2;
IN2 control outputs OUT3 and OUT4.
8
OUT4
10
OUT3
11
OUT1
13
OUT2
4 Vref
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
supply voltages.
Output pins.
Have built-in spark killer diodes.
Reference voltage (= 2.0 V).
CC
and V
IN
Continued on next page.
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Continued from preceding page.
LB1840M
Pin No.
Symbol Equivalent Circuit Diagram Pin Function
5V
2 ENA
7VM
C
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
supply voltages.
Standby/drive control input pin.
Current drain in standby mode is 10 µA 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
supply voltage.
Control input pin for switching between
constant voltage output and saturated
output.
L: –0.3 to V
(saturated output)
H: V
(constant-voltage regulated output)
CC
− 0.3 to VCCor open
CC
= 2.5 × VC. There
O
CC
and V
CC
− 2.5 V
and V
ENA
C
O
Sample Application Circuit
Stepping motor
If the outputs oscillate, insert capacitors
of 0.001 to 0.1 µF between the outputs.
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Specified board (30 × 30 × 1.5 mm3glass epoxy)
Allowable power dissipation, Pd max — mW
Ambient temperature, Ta — °C
LB1840M
(sat) — V
O
Output saturation voltage, V
Output current, IO—mA
No load
—µA
IN
Input current, I
—V
O
Output voltage, V
No load
Input voltage, VIN—V
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.
Supply voltage, VCC—V
This catalog provides information as of October, 1996. Specifications and information herein are subject to change without notice.
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