Ordering number : EN6802A
Monolithic Digital IC
LB1938T
Overview
1ch, Low-saturation
Forward/Reverse Motor Driver
The LB1938T is an H-bridge motor driver that supports low-voltage drive and features low-saturation outputs in an
ultraminiature slim package. The LB1938T provides forward, reverse, brake, and standby modes controlled by two input
signals, and is an optimal DC motor driver for notebook personal computers, digital cameras, cell phones, and other
portable equipment.
Features
•
Ultraminiature MSOP8 package (3.0mm×4.9mm×0.93mm)
•
The low saturation voltage means that the voltage applied to the motor is higher and IC heat generation is reduced.
This allows this IC to be used in environments with higher ambient operating temperatures.
Output saturation voltage (high side + low side): VOsat = 0.15V typical (IO = 100mA)
•
The wide usable voltage range and the low standby mode current drain of 0.1 µA make this IC optimal for battery
operated equipment.
•
There are no constraints on the relationship between the input signal voltage and the supply voltage. For example, this
IC can be use at VCC = 3V and VIN = 5V.
•
Thermal protection circuit limits the drive current and prevents the IC from causing a fire or being destroyed if the IC
chip temperature reaches or exceeds 180°C due to large currents flowing when the outputs are shorted due to, for
example, motor layer shorting or other phenomena.
Specifications
Absolute Maximum Ratings
at Ta = 25°C
Parameter
Supply voltage
Output current
Output voltage
Input applied voltage
Symbol
VCC max
IOUT max
VOUT max
VIH max
Conditions
Ratings
10.5
800
VCC+VSF
10
Unit
V
mA
V
V
Continued on next page.
Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to
"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,
communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be
intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace
instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety
equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case
of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee
thereof. If you should intend to use our products for applications outside the standard applications of our
customer who is considering such use and/or outside the scope of our intended standard applications, please
consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our
customer shall be solely responsible for the use.
Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate
the performance, characteristics, and functions of the described products in the independent state, and are not
guarantees of the performance, characteristics, and functions of the described products as mounted in the
customer
'
s products or equipment. To verify symptoms and states that cannot be evaluated in an independent
device, the customer should always evaluate and test devices mounted in the customer
'
s products or
equipment.
60607 MS IM / 91003 TN (OT) No.6802-1/5
LB1938T
Continued from preceding page.
Parameter
Allowable power dissipation
Operating temperature range
Storage temperature range
Symbol
Pd max
Topr
Tstg
Conditions
Mounted on a specified board *
Ratings
400
-30 to +85
-55 to +150
Unit
mW
°C
°C
Note *: Mounted on a specified board: 114.3mm×76.1mm×1.5mm, glass epoxy resin, wiring density 20%
Allowable Operating Range
at Ta = 25°C
Parameter
Supply voltage
Input high-level voltage
Input low-level voltage
Symbol
VCC
VIH
VIL
Conditions
Ratings
2.2 to 10
2.0 to 9.5
-0.3 to +0.3
Unit
V
V
V
Electrical Characteristics
at Ta = 25°C, VCC = 3V
Parameter
Circuit current
Symbol
ICC1
ICC2
ICC3
Output saturation voltage
VOsat1
VOsat2
VOsat3
Spark killer diode forward voltage
Spark killer diode inverse current
Input current
Thermal protection operating
temperature
Note *: Design target value: Measurement with a single unit not made.
VSF
IRS
IIN
TSD
Standby
Forward/reverse drive
Brake
Upper+lower IO = 100mA
for forward/reverse rotation
Upper+lower IO = 300mA
for forward/reverse rotation
Upper IO = 100mA for braking
IO = 300mA
VOUT = 10V
VIN = 5V
Design target value *
0.1
0.9
0.1
75
180
0.15
1.7
5
98
V
V
µA
µA
°C
0.35
0.5
V
Conditions
min
Ratings
typ
0.1
14
20
0.15
max
5
19
29
0.2
µA
mA
mA
V
Unit
Package Dimensions
unit : mm (typ)
3245B
Allowable Power Dissipation, Pd max - mW
3.0
8
700
Pd max - Ta
600
500
400
Mounted on a specified board
114.3mm×76.1mm×1.5 mm, glass epoxy resin
3.0
4.9
0.5
300
208
200
1
(0.53)
2
0.65
0.25
0.125
(0.85)
1.1MAX
100
0
-30
0
30
60
90
120
ILB01453
Ambient Temperature, Ta -°C
0.08
SANYO : MSOP8(150mil)
No.6802-2/5
LB1938T
Pin Assignment
VCC 1
IN1 2
8
7
P-GND
OUT1
OUT2
NC
Top view
ILB01454
LB1938T
IN2 3
S-GND 4
6
5
MSOP8
S-GND: GND for the control system
P-GND: GND for the power system
Truth Table
IN1
L
H
L
H
IN2
L
L
H
H
OUT1
OFF
H
L
H
OUT2
OFF
L
H
H
Mode
Standby
Forward rotation
Reverse rotation
Brake
Sample Application Circuit
C1 = 0.1 to 10µF
VCC
1
IN1
60kΩ
2
80kΩ
OUT1
Control block
CPU
7
M
6
OUT2
IN2
60kΩ
3
80kΩ
S-GND
4
8
P-GND
ILB01455
Cautions:
•
VCC and GND lines suffer substantial fluctuation in the current quantity, causing a problem of line oscillation in
certain cases. In this case, take following points into account:
(1) Use a thick and short wiring to reduce the wiring inductance.
(2) Insert a capacitor with satisfactory frequency characteristics near IC.
(3) Connect S-GND to the control system GND on the CPU side and P-GND to the power system GND.
No.6802-3/5
LB1938T
0.5
VO(sat) - IO
VCC = 3V
Output saturation voltage, VO(sat) - V
0.5
VO(sat) - Ta
VCC = 3V
Output saturation voltage, VO(sat) - V
0.4
0.4
IO = 3
0.3
0 0mA
0.3
0.2
0.2
0.1
0.1
A
IO = 100m
0
0
100
200
300
400
500
ILB01459
0
-40
-20
0
20
40
60
80
100
120
140
Output current, IO - mA
28
Ambient temperature, Ta -
°C
28
ILB01458
ICC - Tc
ICC - VCC
VCC = VIN
e
Brake mod
24
24
Current drain, ICC - mA
20
Current drain, ICC - mA
20
16
16
12
Forw
a rd o
8
Bra
k
VC e mode
C =5
V
r reve
rse m
ode, V
3V
CC = 5
V
revers
Forward or
e mode
IN1
IN2
12
8
4
4
3V
0
-40
0
-20
0
20
40
60
80
100
120
140
0
1
2
3
4
5
6
7
8
9
10
Case temperature, Tc -
°C
160
ILB01457
2.0
Supply voltage, VCC - V
ILB01460
IIN - VIN
VCC = 3V
ICC Standby Mode Temperature Characteristics
VCC = 11V
1.6
Current drain, ICC -
µA
Input current, IIN -
µA
120
1.2
80
0.8
40
0.4
0.29
Under 0.01µA
0
0
1
2
3
4
5
6
7
8
9
10
0
-40
-20
0
20
40
60
80
100
120
140
Input voltage, VIN - V
100
ILB01461
Case temperature, Tc -
°C
ILB01462
IN Pin Input Current Temperature Characteristics
VIN = 5V
80
Input current, IIN -
µA
60
40
20
0
-40
-20
0
20
40
60
80
100
120
140
Case temperature, Tc -
°C
ILB01463
No.6802-4/5
LB1938T
SANYO Semiconductor Co.,Ltd. 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 Semiconductor Co.,Ltd.
products described or contained herein.
SANYO Semiconductor Co.,Ltd. strives to supply high-quality high-reliability products, however, any and all
semiconductor products fail or malfunction with some probability. It is possible that these probabilistic failures or
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to smoke or fire, or accidents that could cause damage to other property. When designing equipment, adopt
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limited to protective circuits and error prevention circuits for safe design, redundant design, and structural
design.
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Any and all information described or contained herein are subject to change without notice due to
product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the
SANYO Semiconductor Co.,Ltd. product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed
for volume production.
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with regard to intellectual property rights or any other rights of SANYO Semiconductor Co.,Ltd. or any third
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intellctual property rights which has resulted from the use of the technical information and products mentioned
above.
This catalog provides information as of June, 2007. Specifications and information herein are subject
to change without notice.
PS No.6802-5/5
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