LB1930MC Motor Driver Application Note

LB1930MC
BIP monolithic IC
Low-Voltage, Low-Saturation
http://onsemi.com
Brush DC Motor Driver
Application Note
Overview
The LB1930MC is a low saturation voltage single-channel H-bridge Brush DC motor driver that supports
low-voltage drive.
Function
 The low saturation voltage reduces IC internal heating and allows a high voltage to be applied to the motor.
Thus this device can be used even in environments with a high operating ambient temperature.
Output saturation voltage:
Vsat1 = 0.25V typical (IO = 0.2A)
(High side + low side):
Vsat2 = 0.55V typical (IO = 0.5A)
Operating temperature range:
Ta = -30 to +85°C
 The LB1930MC features the wide operating voltage range of 2.2 to 10.8V and the low standby current drain
of 0.1A, and therefore can easily be used in battery operated systems.
 To minimize through currents, the LB1930M internal logic passes through an internal standby state when
switched by the input signals between forward/reverse and brake, or between forward and reverse.
 There are no constraints on the relationship between the input voltage and the supply voltage. For example,
the LB1930MC can be used with VCC = 3V, and VIN = 5V.
 If the IC chip exceeds 180°C due to an output short causing a large current flow, the built-in thermal
protection circuit suppresses the drive current to prevent fires or destruction of the IC.
 SOIC-10NB miniature package. Also, the LB1930MC features the high allowable power dissipation of Pd =
800mW.
Typical Applications
 CD, MD, and cassette player loading motors.
 Camera lens/shutter/lens barrier control
 Battery powered toys and games
 Robotic actuators and pumps
 Portable printers/scanners
Package Dimensions
Typical Application
unit : mm (typ)
.
Semiconductor Components Industries, LLC, 2013
December, 2013
1/13
LB1930MC Application Note
Pin Assignment
Block Diagram and Application Circuit Example
C1=1μF
VCC
1
60kΩ
CPU
4
60kΩ
80kΩ
IN2
Control block
3
80kΩ
IN1
5
9
OUT1
M
7
S-GND
6
OUT2
P-GND
Pdmax－Ta
114.3mm76.1mm1.5mm: glass epoxy printed circuit board.
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LB1930MC Application Note
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC max
11
Output current
IOUT max
1000
V
mA
Output voltage handling
VOUT max
Applied input voltage
IH max
VCC + VSF
V
10.5
V
Allowable power dissipation
Pd max
750
mW
Operating temperature
Topr
-30 to +85
C
Storage temperature
Tstg
-55 to +150
C
Mounted on a specified board *
. * Specified board: 114.3mm  76.1mm  1.5mm, glass epoxy board.
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.
Recommended Operating Conditions at Ta = 25C
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
Supply voltage
VCC
2.2
10.8
V
High-level input voltage
VIH
2.0
10
V
Low-level input voltage
VIL
-0.3
+0.3
V
Electrical Characteristics at Ta  25C, VCC = 3V
Parameter
Current drain
Symbol
ICC1
Conditions
Ratings
min
Standby mode
typ
Unit
max
0.1
5
A
ICC2
Forward or reverse drive operation
15
21
mA
ICC3
Braking
22
31
mA
VO(sat)1
Forward or reverse drive: High side + low side,
IO = 200mA
0.25
0.35
V
VO(sat)2
Forward or reverse drive: High side + low side,
IO = 500mA
0.55
0.75
V
VO(sat)3
Forward or reverse drive: High side only,
IO = 200mA
0.15
0.25
V
Input current
IIN
VIN = 5V
70
95
A
Thermal detection operating
temperature
THD
Design guarantee value*
180
200
C
Output saturation voltage
150
Spark killer diode
Forward voltage
VSF
IO = 200mA
0.9
1.7
V
Reverse current
IRS
VOUT = 10V
0.1
5
A
* Design guarantee value, Do not measurement.
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LB1930MC Application Note
Truth Table
IN1
IN2
OUT1
OUT2
Mode
L
L
OFF
OFF
Standby
H
L
H
L
Forward
L
H
L
H
Reverse
H
H
H
H
Brake
Usage Notes
Oscillation may occur in the VCC and P-GND lines, since these lines carry a wide range of currents. The
following may help if this is a problem.
(1) Lower the inductance of the wiring by making lines wider and shorter.
(2) Insert capacitors with good frequency characteristics close to the IC.
(3) Consider adopting the following methods if the CPU and this IC are mounted on different printed circuit
boards that could easily have different ground potentials.
 Connect S-GND to the CPU ground and connect P-GND to the power system ground.
 Insert resistors of about 10k in series between the controller outputs and the inputs on this IC.
4/13
LB1930MC Application Note
VO(sat) -- IO
0.9
0.6
total
(Low + High side)
0.4
0.2
0
0
0.1
0.2
0.3
0.4
VO(sat) -- Tc
1.0
Ta = 25°C
VCC = 5V
0.5
0.6
0.7
Output saturation voltage, VO(sat) -- V
Output saturation voltage, VO(sat) -- V
1.0
0.9
0mA
I O = 50
0.6
0.4
IO = 200mA
0.2
0
-40
0.8
-20
0
ICC -- VCC
28
20
40
60
80
100
120
140
Case temperature, Tc -- °C
Output current, IO -- A
ICC -- Tc
20
Forward/reverse
Brake
Current drain, ICC -- mA
Current drain, ICC -- mA
24
20
rse
Forward/reve
16
12
8
16
VC
C = 8V
12
VCC = 3V
8
VCC = 2V
4
4
0
0
1
2
3
4
5
6
7
8
9
10
11
0
-40
12
-20
0
ICC -- Tc
28
20
40
60
80
100
120
140
8
9
10
Case temperature, Tc -- °C
Supply voltage, VCC -- V
IIN -- VIN
160
Brake
VCC = 3V
20
VC
C = 8V
16
VCC =
3V
Input current, IIN -- μA
Current drain, ICC -- mA
24
12
VCC = 2V
8
120
80
40
4
0
-40
-20
0
20
40
60
80
100
120
0
140
Case temperature, Tc -- °C
1.8
0
1
2
3
4
5
6
7
Input voltage, VIN -- V
ICC Standby Temperature Characteristics
100
IN pin Input Current vs. Temperature Characteristics
VIN = 5V
VCC = 11V
1.6
Input current, IIN -- μA
Current drain, ICC -- μA
80
1.2
0.8
0.4
0
-40
-20
0
20
40
60
80
Case temperature, Tc -- °C
100
120
40
20
0.29
Under 0.01μA
60
140
0
-40
-20
0
20
40
60
80
100
120
140
Case temperature, Tc -- °C
5/13
LB1930MC Application Note
Motor connecting figure
6
PGND
7
OUT2
8
9
OUT1
(NC)
10
(NC)
DCmotor
Motor
voltage
supply
VCC
(NC)
IN1
IN2
SGND
1
2
3
4
5
LB1930
C1
+
10uF
Control
input
Electrostatic capacitor C1 is used to stabilize power.
Requirement for capacitance value varies depends on substrate wiring, motor, and power.
The recommendation range of C1 is approximately 0.1μF to 10μF.
Please check supply voltage waveform when motor is under operation and use a capacitor for stable operation.
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LB1930MC Application Note
Waveform example
No load VCC=3V IN2=”L”
No load VCC=3V IN2=”H”
IN1
IN1
OUT1
OUT1
foward stand-by
brake
OUT2
OUT2
stand-by
2ms/div
2ms/div
No load VCC=6V IN2=”L”
No load VCC=6V IN2=”H”
IN1
IN1
OUT1
OUT1
foward stand-by
OUT2
brake
OUT2
stand-by
2ms/div
2ms/div
No load VCC=3V IN2=”H”
Time scale expansion
“fall time”
No load VCC=3V IN2=”H”
Time scale expansion
IN1
IN1
OUT1
brake
1us/div
forward
“rise time”
OUT1
reverse
OUT2
brake
OUT2
1us/div
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LB1930MC Application Note
No load VCC=6V IN2=”H”
Time scale expansion
No load VCC=6V IN2=”H”
Time scale expansion
“fall time”
IN1
IN1
OUT1
brake
forward
OUT1
reverse
OUT2
1us/div
brake
OUT2
1us/div
No load VCC=10V IN2=”H”
Time scale expansion
“fall time”
No load VCC=10V IN2=”H”
Time scale expansion
OUT1
brake
forward
“rise time”
IN1
IN1
1us/div
“rise time”
OUT1
reverse
OUT2
brake
OUT2
1us/div
8/13
LB1930MC Application Note
DC motor load VCC=3V IN2=”L”
Current waveform example
“motor start”
IN1
OUT1
OUT2
Icoil
Standby
Motor stop
reverse
Motor rotate
20ms/div
When DC motor starts up, the current value becomes high. However, rotation of DC motor starts, induced
voltage Ea is generated, and current decreases according to the rotation frequency.
If a coil resistance is set to Rcoil and motor voltage is set to Vm, then motor current is obtained as follows:
Im=(Vm-Ea)/Rcoil.
DC motor load VCC=3V IN2=”H”
Current waveform example
“brake current”
IN1
OUT1
OUT2
Icoil
20ms/div
brake
reverse
Motor stop
Motor rotate
brake
When DC motor is under rotation, if brake mode is set, then DC motor becomes short-brake status, and speed
falls rapidly.
In this case, current Im (Im=Ea/Rcoil) flows to the opposite direction by the induced voltage Ea generated
during motor rotation. If DC motor stops rotation, then Ea=0, and current becomes 0.
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LB1930MC Application Note
DC motor load VCC =3V
Current waveform example “active reverse brake current”
IN1
IN2
OUT1
Icoil
brake
reverse
forward
Motor stop
20ms/div
If rotation direction is switched while DC motor is rotating, then torque of reverse-rotation is generated, the
speed of motor rotation becomes slow and reverse rotation is performed.
In this case, since voltage of VM is added to induced voltage Ea generated during motor rotation, the motor
current flows into the motor coil which is obtained as follows: Im=(VM+Ea)/Rcoil.
When you switch from forward to reverse, if the current exceeds Iomax, make sure to set brake mode until the
induced voltage is reduced between forward and reverse.
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LB1930MC Application Note
Evaluation board description

VIN terminal is a power supply input terminal for switches.
5V are to impress it and can perform the setting that is in a state by the switch operation and logic input.

Operation method
Power supply injection order: VCC → VIN

Truth value table
IN1
IN2
OUT1
OUT2
Mode
L
L
OFF
OFF
Standby
H
L
H
L
Forward
L
H
L
H
Reverse
H
H
H
H
Brake
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LB1930MC Application Note
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LB1930MC Application Note
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