SANYO LB1848M, LB1846M Datasheet
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.
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. VO(sat) = 0.55 V typical at IO=
400 mA
• Standby current: zero
• Thermal shutdown circuit
• Miniature package: MFP-10S (6.5 × 5.1 mm)
• 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 (VCC) and the input voltage
(VIN)
Package Dimensions
unit: mm
3086A-MFP10S
Monolithic Digital IC
Ordering number : EN5339
O3096HA (OT) No. 5339-1/6
SANYO: MFP10S
[LB1846M, 1848M]
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
Low-Voltage/Low Saturation Voltage Type
Bidirectional Motor Driver
LB1846M, 1848M
No. 5339-2/6
LB1846M, 1848M
Parameter Symbol Conditions Ratings Unit
Supply voltage V
CC
2.5 to 7.5 V
Input high-level voltage V
IH
2.0 to 7.5 V
Input low-level voltage V
IL
–0.3 to +0.7 V
Allowable Operating Ranges at Ta = 25°C
Parameter Symbol Conditions
Ratings
Unit
min typ max
[LB1846M]
Current drain
I
CC
0 IN1, 2, 3, 4 = 0 V 0.1 10 µA
I
CC
1 IN1, 3 = 3 V, IN2, 4 = 0 V 30 40 mA
V
OUT
1
V
IN
= 3 V or 0 V, VCC= 3 to 7.5 V,
0.27 0.4 V
Output saturation voltage
I
OUT
= 200 mA
V
OUT
2
V
IN
= 3 V or 0 V, VCC= 4 to 7.5 V,
0.55 0.8 V
I
OUT
= 400 mA
Input current I
IN
VIN= 5 V 150 200 µA
[Spark Killer Diode]
Reverse current I
S
(leak) 30 µA
Forward voltage V
SFIOUT
= 400 mA 1.7 V
[LB1848M]
Current drain
I
CC
0 ENA = 0 V, VIN= 3 V or 0 V 0.1 10 µA
I
CC
1 ENA = 3 V, VIN= 3 V or 0 V 25 35 mA
V
OUT
1
ENA = 3 V, V
IN
= 3 V or 0 V,
0.27 0.4 V
Output saturation voltage
V
CC
= 3 to 7.5 V, I
OUT
= 200 mA
V
OUT
2
ENA = 3 V, V
IN
= 3 V or 0 V,
0.55 0.8 V
V
CC
= 4 to 7.5 V, I
OUT
= 400 mA
Input current 1 I
IN
VIN= 5 V 75 100 µA
Input current 2 I
ENA
ENA = 5 V 85 110 µA
[Spark Killer Diode]
Reverse current I
S
(leak) 30 µA
Forward voltage V
SFIOUT
= 400 mA 1.7 V
Electrical Characteristics at Ta = 25°C, VCC= 5.0 V
Pin Assignments
Parameter Symbol Conditions Ratings Unit
Maximum supply voltage V
CC
max –0.3 to +8.0 V
Output voltage V
OUT
VCC+ V
SF
V
Input voltage V
IN
–0.3 to +8.0 V
Ground pin outflow current I
GND
Per channel 800 mA
Allowable power dissipation
Pd max1 Independent IC 350 mW
Pd max2 When mounted* 870 mW
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –40 to +150 °C
Specifications
Absolute Maximum Ratings at Ta = 25°C
Note: *On the specified circuit board (a 114.3 × 76.2 × 1.5-mm glass-epoxy printed circuit board)
Note: The thermal shutdown circuit function values are design guarantees, and are not tested.
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