Ordering number : ENN5339A
Monolithic Digital IC
LB1846M, 1848M
Low-Voltage/Low Saturation Voltage Type
Bidirectional Motor Driver
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.
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).
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.
•
•
•
•
•
Standby current: zero
Thermal shutdown circuit
Miniature package: MFP-10S (6.5
×
5.1 mm
2
)
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
CC
) and the input voltage
(V
IN
)
Package Dimensions
unit: mm
3086A-MFP10S
[LB1846M, 1848M]
10
6
0.625
1.8 max
0.15
0.55
0.1
1.5
1
5.1
5
Features
• Optimal for 1-2 phase excitation drive for 2-phase
stepping motors (LB1846M)
• Optimal for 2 phase excitation drive for 2-phase
stepping motors (LB1848M)
• Low saturation voltage. V
O
(sat) = 0.55 V typical at I
O
=
400 mA
0.35
1.0
SANYO: MFP10S
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
5.15
6.4
4.4
LB1846M, 1848M
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Maximum supply voltage
Output voltage
Input voltage
Ground pin outflow current
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
max
V
OUT
V
IN
I
GND
Pd max1
Pd max2
Topr
Tstg
Per channel
Independent IC
When mounted*
Conditions
Ratings
–0.3 to +8.0
V
CC
+ V
SF
–0.3 to +8.0
800
350
870
–20 to +75
–40 to +150
Unit
V
V
V
mA
mW
mW
°C
°C
Note:
*On
the specified circuit board (a 114.3
×
76.2
×
1.5-mm
3
glass-epoxy printed circuit board)
Allowable Operating Ranges
at Ta = 25°C
Parameter
Supply voltage
Input high-level voltage
Input low-level voltage
Symbol
V
CC
V
IH
V
IL
Conditions
Ratings
2.5 to 7.5
2.0 to 7.5
–0.3 to +0.7
Unit
V
V
V
Electrical Characteristics
at Ta = 25°C, V
CC
= 5.0 V
Parameter
[LB1846M]
Current drain
I
CC
0
I
CC
1
V
OUT
1
Output saturation voltage
V
OUT
2
Input current
[Spark Killer Diode]
Reverse current
Forward voltage
[LB1848M]
Current drain
I
CC
0
I
CC
1
V
OUT
1
Output saturation voltage
V
OUT
2
Input current 1
Input current 2
[Spark Killer Diode]
Reverse current
Forward voltage
I
S
(leak)
V
SF
I
OUT
= 400 mA
30
1.7
µA
V
I
IN
I
ENA
ENA = 0 V, V
IN
= 3 V or 0 V
ENA = 3 V, V
IN
= 3 V or 0 V
ENA = 3 V, V
IN
= 3 V or 0 V,
V
CC
= 3 to 7.5 V, I
OUT
= 200 mA
ENA = 3 V, V
IN
= 3 V or 0 V,
V
CC
= 4 to 7.5 V, I
OUT
= 400 mA
V
IN
= 5 V
ENA = 5 V
0.1
25
0.27
0.55
75
85
10
35
0.4
0.8
100
110
µA
mA
V
V
µA
µA
I
S
(leak)
V
SF
I
OUT
= 400 mA
30
1.7
µA
V
I
IN
IN1, 2, 3, 4 = 0 V
IN1, 3 = 3 V, IN2, 4 = 0 V
V
IN
= 3 V or 0 V, V
CC
= 3 to 7.5 V,
I
OUT
= 200 mA
V
IN
= 3 V or 0 V, V
CC
= 4 to 7.5 V,
I
OUT
= 400 mA
V
IN
= 5 V
0.1
30
0.27
0.55
150
10
40
0.4
0.8
200
µA
mA
V
V
µA
Symbol
Conditions
Ratings
min
typ
max
Unit
Note: The thermal shutdown circuit function values are design guarantees, and are not tested.
No. 5339-2/8
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
CC
and ground lines, oscillations may occur on these lines. The following points
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
京公网安备 11010802033920号
EEWORLD
