SANYO LB1836M Datasheet
Ordering number: EN3947B
Monolithic Digital IC
LB1836M
Low-saturation, Bidirectional Motor Driver
for Low-voltage Applications
Overview
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.
Features
.
Low voltage operation (2.5 V min)
.
Low saturation voltage (upper transistor + lower transistor
residual voltage; 0.40 V typ at 400 mA).
.
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)
Specifications
Absolute Maximum Ratings at Ta = 25°C
Package Dimensions
unit : mm
3111-MFP14S
[LB1836M]
SANYO : MFP14S
Parameter Symbol Conditions Ratings Unit
V
max –0.3 to +10.5 V
Maximum supply voltage
Output applied voltage V
Input applied voltage V
Ground pin flow-out current IGND Per channel 1.0 A
Allowable power dissipation Pd max * With board 800 mW
Operating temperature Topr –20 to +75 °C
Storage temperature Tstg –40 to +125 °C
*Note: Mounted on 30 × 30 × 1.5 mm3glass epoxy PCB
CC
V
max –0.3 to +10.5 V
S
OUT
IN
VS+V
SF
–0.3 to +10 V
Allowable Operating Ranges at Ta = 25°C
Parameter Symbol Conditions Ratings Unit
Supply voltage
Input high-level voltage V
Input low-level voltage V
V
CC
V
S
IH
IL
2.5 to 9.0 V
1.8 to 9.0 V
1.8 to 9.0 V
–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
V
LB1836M
Electrical Characteristics at Ta = 25°C, VCC=VS=3V
Parameter Symbol Conditions min typ max Unit
0VIN1,2,3,4=0V,ICC+I
I
CC
I
Supply current
Output saturation voltage
(upper + lower)
Output sustaining voltage V
Input current I
Spark killer diode reverse
current
Spark killer diode forward
voltage
Pin Assignment
1VIN1=3V,VIN2,3,4=0V,ICC+I
CC
I
2VIN1,2=3V,VIN3,4=0V,ICC+I
CC
1I
V
OUT
V
2I
OUT
V
3I
OUT
V
4I
OUT
(sus) I
O
IN
Is (leak) V
V
SF
= 200 mA 0.2 0.28 V
OUT
= 400 mA 0.4 0.6 V
OUT
= 400 mA, parallel connection 0.25 0.35 V
OUT
= 800 mA, parallel connection 0.5 0.7 V
OUT
= 400 mA 9 V
OUT
VIN=2V,VCC= 6 V 80 µA
1,2=9V 30 µA
CC
I
= 400 mA 1.7 V
OUT
S
S
S
0.1 10 µA
14 20 mA
22 35 mA
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 IN 2, 4 OUT 1, 3 OUT 2, 4 Mode
HLHLForward
LHLHReverse
H H L L Brake
L L OFF OFF 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.
The modes during which large current flows are as follows:
.
Motor 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.
The following points should be kept in mind regarding the pattern layout:
.
Keep the wiring lines thick and short in order to reduce wiring inductance between the power supply (VS) and GND.
.
Insert a passthrough capacitor near the IC. (Maximum effect is obtained by inserting the passthrough capacitor between VSand
the pin 7 GND at the closest distance possible.
.
If the CPU and the LB1836M are mounted on separate boards and the difference between the ground potential of each board is
large, install resistors of about 10 kΩ in series between the CPU and the LB1836M inputs.
No.3947-2/5
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