ENA2041 D

Ordering number : ENA2041
LB1938FA
Monolithic Digital IC
1ch, Low-saturation
Forward/Reverse Motor Driver
http://onsemi.com
Overview
The LB1938FA is an H-bridge motor driver that supports low-voltage drive and features low-saturation outputs in an
ultraminiature slim package. The LB1938FA 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 Micro8 package
• 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
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC max
10.5
V
Output current
IOUT max
800
mA
Output voltage
VOUT max
VCC+VSF
Input applied voltage
VIH max
Allowable power dissipation
Pd max
Mounted on a specified board *
V
10
V
400
mW
Operating temperature range
Topr
-30 to +85
°C
Storage temperature range
Tstg
-55 to +150
°C
Note *: Mounted on a specified board: 114.3mm×76.1mm×1.5mm, glass epoxy resin, wiring density 20%
Caution 1) Absolute maximum ratings represent the value which cannot be exceeded for any length of time.
Caution 2) Even when the device is used within the range of absolute maximum ratings, as a result of continuous usage under high temperature, high
current, high voltage, or drastic temperature change, the reliability of the IC may be degraded. Please contact us for the further details.
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Semiconductor Components Industries, LLC, 2013
May, 2013
40412 SY 20120321-S00010 No.A2041-1/5
LB1938FA
Allowable Operating Range at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC
2.2 to 10
V
Input high-level voltage
VIH
2.0 to 9.5
V
Input low-level voltage
VI L
-0.3 to +0.3
V
Electrical Characteristics at Ta = 25°C, VCC = 3V
Parameter
Symbol
Ratings
Conditions
min
Circuit current
max
ICC1
Standby
0.1
5
μA
ICC2
Forward/reverse drive
14
19
mA
ICC3
Output saturation voltage
Unit
typ
VOsat1
Brake
20
29
mA
0.15
0.2
V
0.35
0.5
V
Upper IO = 100mA for braking
Upper+lower IO = 100mA
for forward/reverse rotation
VOsat2
Upper+lower IO = 300mA
for forward/reverse rotation
VOsat3
0.1
0.15
V
Spark killer diode forward voltage
VSF
IO = 300mA
0.9
1.7
V
Spark killer diode inverse current
IRS
VOUT = 10V
0.1
5
μA
Input current
IIN
VIN = 5V
75
98
μA
Thermal protection operating
TSD
Design target value *
°C
180
temperature
Note *: Design target value: Measurement with a single unit not made.
Package Dimensions
unit : mm (typ)
3427
3.0
Pd max - Ta
8
1 2
0.65
0.18
0.08
1.1 MAX
0.33
Allowable Power Dissipation, Pd max - mW
0.55
4.9
3.0
700
600
500
400
Mounted on a specified board
114.3mm×76.1mm×1.5 mm, glass epoxy resin
300
208
200
100
0
-30
0
30
60
90
120
Ambient Temperature, Ta - C
SANYO : Micro8
No.A2041-2/5
LB1938FA
Pin Assignment
VCC
1
IN1
2
8
P-GND
7
OUT1
LB1938FA
IN2
3
6
OUT2
S-GND
4
5
NC
Top view
S-GND: GND for the control system
P-GND: GND for the power system
Truth Table
IN1
IN2
OUT1
OUT2
Mode
L
L
OFF
OFF
Standby
H
L
H
L
Forward rotation
L
H
L
H
Reverse rotation
H
H
H
H
Brake
Sample Application Circuit
VCC
1
IN1
2
Control block
OUT1
CPU
IN2
7
M
6
3
OUT2
S-GND
4
8
P-GND
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.A2041-3/5
LB1938FA
VO(sat) - IO
0.4
0.3
0.2
0.1
0
0
100
200
300
400
VO(sat) - Ta
0.5
VCC = 3V
Output saturation voltage, VO(sat) - V
Output saturation voltage, VO(sat) - V
0.5
VCC = 3V
0.4
00mA
IO = 3
0.3
0.2
A
IO = 100m
0.1
0
-40
500
-20
0
ICC - Tc
28
20
40
60
80
100
120
140
Ambient temperature, Ta - °C
Output current, IO - mA
ICC - VCC
28
24
VCC = VIN
24
e
20
16
Bra
k
VC e mode
C =5
V
12
Forw
ard o
r reve
8
rse m
ode, V
CC = 5V 3V
4
Current drain, ICC - mA
Current drain, ICC - mA
Brake mod
20
Forward or
16
e IN1
reverse mod
IN2
12
8
4
3V
0
-40
160
0
-20
0
20
40
60
80
100
120
0
140
1
2
3
4
5
6
7
8
9
10
Case temperature, Tc - °C
Supply voltage, VCC - V
IIN - VIN
ICC Standby Mode Temperature Characteristics
2.0
VCC = 3V
VCC = 11V
1.6
120
1.2
80
0.8
40
0.4
0.29
0
0
1
2
3
4
5
6
7
8
9
10
0
-40
-20
0
20
40
60
80
100
120
140
Case temperature, Tc - °C
Input voltage, VIN - V
IN Pin Input Current Temperature Characteristics
100
VIN = 5V
80
60
40
20
0
-40
-20
0
20
40
60
80
100
120
140
Case temperature, Tc - °C
No.A2041-4/5
LB1938FA
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PS No.A2041-5/5
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