LB1938FA [ONSEMI]
1ch, Low-saturation Forward/Reverse Motor Driver;
| 型号： | LB1938FA |
| 厂家： | 
ONSEMI |
| 描述： | 1ch, Low-saturation Forward/Reverse Motor Driver 电动机控制 光电二极管 |
| 文件： | 总5页 (文件大小：96K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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): V sat = 0.15V typical (I = 100mA)
O
O
• 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 V
= 3V and V = 5V.
CC
IN
• 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
V
Supply voltage
Output current
Output voltage
V
max
10.5
800
CC
I
max
max
mA
V
OUT
V
V
+V
OUT
CC SF
10
Input applied voltage
V H max
I
V
Allowable power dissipation
Operating temperature range
Storage temperature range
Pd max
Topr
Mounted on a specified board *
400
mW
°C
°C
-30 to +85
-55 to +150
Tstg
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
Supply voltage
Symbol
Conditions
Ratings
Unit
V
V
2.2 to 10
2.0 to 9.5
CC
Input high-level voltage
Input low-level voltage
V H
I
V
V L
I
-0.3 to +0.3
V
Electrical Characteristics at Ta = 25°C, V
= 3V
CC
Ratings
typ
Parameter
Circuit current
Symbol
Conditions
Unit
min
max
5
I
I
I
1
2
3
Standby
0.1
μA
mA
mA
V
CC
CC
CC
Forward/reverse drive
Brake
14
19
29
0.2
20
Output saturation voltage
V
sat1
sat2
sat3
Upper+lower I = 100mA
O
for forward/reverse rotation
0.15
O
V
Upper+lower I = 300mA
O
for forward/reverse rotation
0.35
0.5
V
O
V
Upper I = 100mA for braking
O
0.1
0.9
0.1
0.15
1.7
5
V
V
O
V
Spark killer diode forward voltage
Spark killer diode inverse current
Input current
I
= 300mA
= 10V
SF
RS
O
I
V
V
μA
OUT
I
= 5V
IN
75
98
μA
°C
IN
Thermal protection operating
temperature
TSD
Design target value *
180
Note *: Design target value: Measurement with a single unit not made.
Package Dimensions
unit : mm (typ)
3427
3.0
8
Pd max - Ta
700
600
500
400
300
200
Mounted on a specified board
114.3mm 76.1mm 1.5 mm, glass epoxy resin
×
×
1
2
0.65
0.33
0.18
208
100
0
-30
0
30
60
90
120
Ambient Temperature, Ta -
C
Micro8
No.A2041-2/5
LB1938FA
Pin Assignment
1
2
3
4
8
7
6
5
V
P-GND
CC
IN1
IN2
OUT1
OUT2
LB1938FA
S-GND
NC
Top view
S-GND: GND for the control system
P-GND: GND for the power system
Truth Table
IN1
IN2
L
OUT1
OFF
H
OUT2
OFF
L
Mode
Standby
L
H
L
Forward rotation
Reverse rotation
Brake
L
H
L
H
H
H
H
H
Sample Application Circuit
V
CC
1
IN1
2
OUT1
OUT2
7
6
CPU
M
IN2
3
S-GND
4
8
P-GND
Cautions:
• V
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:
CC
(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
V (sat) - I
V (sat) - Ta
O
O
O
0.5
0.4
0.3
0.2
0.5
0.4
0.3
0.2
V
= 3V
V
= 3V
CC
CC
0.1
0
0.1
0
0
100
200
300
400
500
-40
-20
0
20
40
60
80
100
120
140
Output current, I - mA
Ambient temperature, Ta - °C
O
I
- Tc
I
- V
CC
CC
CC
28
24
20
16
12
8
28
24
20
16
12
8
V
= V
IN
CC
3V
4
0
4
0
-40
-20
0
20
40
60
80
100
120
140
0
1
2
3
4
5
6
7
8
9
10
Case temperature, Tc - °C
Supply voltage, V
CC
- V
I
IN
- V
I
Standby Mode Temperature Characteristics
IN
CC
160
2.0
V
= 3V
V
= 11V
CC
CC
1.6
1.2
0.8
0.4
120
80
40
0
0.29
0
0
1
2
3
4
5
6
7
8
9
10
-40
-20
0
20
40
60
80
100
120
140
Input voltage, V - V
IN
Case temperature, Tc - °C
IN Pin Input Current Temperature Characteristics
100
V
= 5V
IN
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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application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental
damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual
performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical
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PS No.A2041-5/5
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