Ordering number: EN3947B
Monolithic Digital IC
LB1836M
Low-saturation, Bidirectional Motor Driver
for Low-voltage Applications
Overview
Package Dimensions
The LB1836M is a low-saturation two-channel bidirectional
motor driver IC for use in low-voltage applications.
The LB1836M is a bipolar stepper-motor driver IC that is ideal
for use in printers, FDDs, cameras and other portable devices.
unit : mm
3111-MFP14S
[LB1836M]
Features
. Low voltage operation (2.5 V min)
. Low saturation voltage (upper transistor + lower transistor
voltage; 0.40 V typ at 400 mA).
. residual
Parallel connection
.
.
.
.
.
(Upper transistor + lower transistor residual voltage; 0.5 V
typ at 800 mA).
Separate logic power supply and motor power supply
Brake function
Spark killer diodes built in
Thermal shutdown circuit built in
Compact package (14-pin MFP)
SANYO : MFP14S
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Maximum supply voltage
Output applied voltage
Input applied voltage
Symbol
Conditions
Ratings
Unit
VCC max
–0.3 to +10.5
V
VS max
–0.3 to +10.5
V
VOUT
VIN
Ground pin flow-out current
IGND
Per channel
Allowable power dissipation
Pd max
* With board
VS + VSF
V
–0.3 to +10
V
1.0
A
800
mW
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–40 to +125
°C
Ratings
Unit
*Note: Mounted on 30 × 30 × 1.5 mm3 glass epoxy PCB
Allowable Operating Ranges at Ta = 25°C
Parameter
Supply voltage
Symbol
Conditions
VCC
2.5 to 9.0
V
VS
1.8 to 9.0
V
Input high-level voltage
VIH
1.8 to 9.0
V
Input low-level voltage
VIL
–0.3 to +0.7
V
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
21097HA(II)/D2293/O0693(US) No.3947-1/5
LB1836M
Electrical Characteristics at Ta = 25°C, VCC = VS= 3 V
Parameter
Supply current
Output saturation voltage
(upper + lower)
Output sustaining voltage
Input current
Spark killer diode reverse
current
Spark killer diode forward
voltage
Symbol
ICC0
ICC1
ICC2
VOUT1
VOUT2
VOUT3
VOUT4
VO (sus)
IIN
Conditions
VIN1, 2, 3, 4 = 0 V, ICC + IS
VIN1 = 3 V, VIN2, 3, 4 = 0 V, ICC + IS
VIN1, 2 = 3 V, VIN3, 4 = 0 V, ICC + IS
IOUT = 200 mA
IOUT = 400 mA
IOUT = 400 mA, parallel connection
IOUT = 800 mA, parallel connection
IOUT = 400 mA
VIN = 2 V, VCC = 6 V
Is (leak)
VSF
min
typ
0.1
14
22
0.2
0.4
0.25
0.5
max
10
20
35
0.28
0.6
0.35
0.7
80
Unit
µA
mA
mA
V
V
V
V
V
µA
VCC1, 2 = 9 V
30
µA
IOUT = 400 mA
1.7
V
9
Pin Assignment
Note) Both GNDs must be connected. P-GND of OUT2 and OUT4 and S-GND of the
control section are connected to the pin 7 GND within the IC, and P-GND of OUT1
and OUT3 is connected to the pin 14 GND.
Truth Table
IN 1, 3
H
L
H
L
IN 2, 4
L
H
H
L
OUT 1, 3
H
L
L
OFF
OUT 2, 4
L
H
L
OFF
Mode
Forward
Reverse
Brake
Standby
Design Notes
If large current flows on the power supply (VS) line and the GND line, then in some applications and layouts, misoperation due to
line oscillation may result.
modes during which large current flows are as follows:
.TheMotor
surge current when the DC motor starts up or when it shifts rotation directions (forward O reverse).
. Passthrough
current generated within the IC when shifting rotation directions (forward O reverse) or when shifting from
forward/reverse rotation to braking, or vice versa.
points should be kept in mind regarding the pattern layout:
.TheKeepfollowing
the wiring lines thick and short in order to reduce wiring inductance between the power supply (V ) and GND.
. Insert a passthrough capacitor near the IC. (Maximum effect is obtained by inserting the passthrough capacitor between V and
7 GND at the closest distance possible.
. IfthethepinCPU
and the LB1836M are mounted on separate boards and the difference between the ground potential of each board is
S
S
large, install resistors of about 10 kΩ in series between the CPU and the LB1836M inputs.
No.3947-2/5
LB1836M
Control
Block Diagram
Control
Thermal
shutdown
Note: As long as the voltages applied to VCC, VS1, VS2, and IN1 through IN4 are within the limits set by the absolute
maximum ratings, there are no restrictions on the relationship of each voltage level in comparison
with the others (regarding which is higher or lower). (ex. VCC = 3 V, VS1, 2 = 2 V, IN1 to IN4 = 5 V)
Vcont pin
(= constant)
As shown in the above diagram, the Vcont pin outputs the voltage of the band gap Zener VZ+VF (= 1.93 V).
In normal use, this pin is left open.
The drive current ID is varied by the Vcont voltage. However, because the band gap Zener is shared, it functions as a bridge.
No.3947-3/5
Output saturation voltage, VO(sat) − V
Specified board (30 × 30 × 1.5 mm3 glass epoxy )
Ambient temperature, Ta − °C
Output current, IO − mA
Output saturation voltage, VO (sat) – V
Input current, IIN − µA
Allowable power dissipation, Pd max − mW
LB1836M
Parallel
connection total
Ambient temperature, Ta − °C
Current drain, IS – mA
Output saturation voltage, VO (sat) – V
Ambient temperature, Ta − °C
Break
Forward
Reverse
Ambient temperature, Ta − °C
Break
Forward
Reverse
Ambient temperature, Ta − °C
Input current, IIN − µA
Output current, IO − mA
Current drain, ICC – mA
total value
Input voltage, VIN − V
No.3947-4/5
LB1836M
Current drain, ICC – mA
Forward/Reverse
Current drain, IS – mA
Break
Break
Forward/Reverse
Standby
Supply voltage, VCC – V
Standby
Supply voltage, VS – V
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 February, 1997. Specifications and information herein are subject to change without notice.
No.3947-5/5