LV8548MC Motor Driver IC Application Note

LV8548MC
Bi-CMOS integrated circuit
12V Low Saturation Voltage Drive
http://onsemi.com
Forward/Reverse Motor Driver
Application Note
Overview
The LV8548MC is a 2-channel low saturation voltage forward/reverse motor driver IC. It is optimal for motor
drive in 12V system products and can drive either two DC motors, one DC motor using parallel connection ,
or it can drive a stepper motor in Full-step and Half-step.
Function








DMOS output transistor adoption (Upper and lower total RON = 1Ωtyp)
The compact package (SOIC10) is adopted.
VCC max = 20v, IO max = 1A
Built-in brake function
Our motor driver IC, LB1948MC, and compatible pin
For one power supply (The control system power supply is unnecessary.)
Current consumption 0 when standing by
It is possible to connect it in parallel (parallel, connected operation of drive ch).
Typical Applications






Refrigerators
Time Recorder
Label Printer
Vacuum cleaner
POS Printer
TOY
Pin Assignment
1
VCC
OUT1 10
2
IN1
OUT2
9
3
IN2
OUT3
8
4
IN3
OUT4
7
5
IN4
GND
6
LV8548MC
（Top View)
Semiconductor Components Industries, LLC, 2013
December, 2013
1/17
LV8548MC Application Note
Package Dimensions
symbol
D
D1
A
A1
A2
e
L
b
c
x
y
HE
E
Θ
Z
MIN.
SOIC10
NOM.
4.80
<4.90>
0.10
1.25
<0.175>
0.40
0.31
0.17
5.80
3.80
0.00
1.00
<0.835>
<0.41>
<0.21>
0.25
0.10
<6.00>
<3.90>
MAX.
5.00
1.75
0.25
1.75
1.27
0.51
0.25
6.20
4.00
8.00
Caution: The package dimension is a reference value, which is not a guaranteed value.
2/17
LV8548MC Application Note
Block Diagram
Figure1 Two DC motor drive
VCC
C1
LVS
H- side
PRE
IN1
OUT1
IN2
Logic
Input
OUT2
L- side
PRE
IN_ PUT
LOGIC
VCC
IN3
H- side
PRE
OUT3
IN4
OUT4
TSD
M
L- side
PRE
VREF
GND
Figure2 One stepper motor drive
3/17
LV8548MC Application Note
Specifications
Maximum Ratings at Ta = 25C
Parameter
Symbol
Maximum power supply voltage
Conditions
Ratings
Unit
VCC max
-0.3 to +20
Output impression voltage
VOUT
-0.3 to +20
V
Input impression voltage
VIN
-0.3 to +6
V
GND pin outflow current
IGND
For ch
Allowable Power dissipation
Pd max
*
Operating temperature
Storage temperature
V
1.0
A
1.05
W
Topr
-30 to +85
C
Tstg
-40 to +150
C
*: When mounted on the specified printed circuit board (57.0mm ×57.0mm × 1.6mm), glass epoxy, both sides
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 Condition at Ta  25C
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
Power supply voltage
VCC
4
6
V
Input “H” level voltage
VINH
+1,8
+5.5
V
Input “L” level voltage
VINL
-0.3
+0.7
V
Electrical Characteristics at Ta  25C, VCC = 12V
Parameter
Power supply current
Symbol
ICC0
Conditions
Ratings
min
typ
Unit
max
Standby mode
1
A
2.3
mA
IN1 = IN2 = IN3 = IN4 = ”LOW”
ICC1
It is "High" from IN1 as for either of IN4.
Load opening
Input current
IIN
VIN = 5V
Thermal shutdown operating
Ttsd
Design certification
Width of temperature hysteria
Ttsd
Design certification
Low voltage protection function
VthVCC
1.7
35
50
65
A
150
180
210
C
3.3
3.5
3.65
3.55
3.8
3.95
V
0.7
1
1.25

10
A
1.0
1.2
V
temperature
C
40
V
operation voltage
Release voltage
Vthret
Output ON resistance
RON
IOUT = 1.0A
Output leak current
IOleak
VO = 16V
Diode forward voltage
VD
ID = 1.0A
(Upper and lower total)
4/17
2.0
2.5
1.5
2.0
1.0
1.5
ICC1 (mA)
ICC0 (μA)
LV8548MC Application Note
0.5
0.0
-0.5
0.5
0.0
4
6
8
10
12
14
VCC (V)
Figure 3 Standby Load Power
Supply Current vs VCC Voltage
16
4
70
1.2
60
1
50
30
20
10
0
8
10
12
14
16
VCC (V)
Figure 4 Operating Consumption
Current vs VCC Voltage
0.6
0.4
OUT1→OUT2
0.2
OUT2→OUT1
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5
VIN (V)
Figure 5 Input Supply current vs
Vin Voltage
0
1.2
2.0
1
1.5
Ioleak (µA)
0.8
VD (V)
6
0.8
40
Ron (Ω)
IIN (μA)
1.0
0.6
0.4
Upper-side
0.2
Lower-side
0
0.2
0.4
0.6
0.8
Iout (A)
Figure 6 Output on Resistance vs
Output Current (VCC=12V)
1
Ioleak Pch
1.0
Ioleak Nch
0.5
0.0
-0.5
0
0.2
0.4
0.6
0.8
ID(A)
Figure 7 Diode Forward Voltage
vs ID Current
1
4
6
8
10
12
14
VCC (V)
Figure 8 Output Leak Current
vs VCC Voltage
16
5/17
2.5
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
2.0
ICC1 (mA)
ICC0 (µA)
LV8548MC Application Note
1.5
1.0
0.5
0.0
-30
0
30
60
90
-30
120
60
5
50
4
40
3
IoLeak (µA)
IIN (µA)
Figure 9 Standby Load Power Supply Current
vs Temperature (VCC=12V)
30
20
10
30
60
90
120
Ioleak Pch
Ioleak Nch
2
1
0
-1
0
-30
0
30
60
90
-30
120
VIN H (V)
Operation Voltage
Release Voltage
-30
0
30
60
90
120
TEMPERATURE (˚C)
Figure 13 Low Voltage Protection Function
Threshold Voltage
vs Temperature
30
60
90
120
90
120
Figure 12 Output Leak Current
vs Temperature (VCC=12V)
Figure 11 Input Supply current
vs Temperature (VIN=5V)
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
TEMPERATURE (˚C)
TEMPERATURE (˚C)
Vth (V)
0
TEMPERATURE (˚C)
Figure 10 Operating Consumption Current
vs Temperature (VCC=12V)
TEMPERATURE (˚C)
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
-30
0
30
60
TEMPERATURE (˚C)
Figure 14 Input "H" Level Threshold Voltage
vs Temperature
6/17
1.8
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
1.6
1.4
1.2
VD (V)
Ron (Ω)
LV8548MC Application Note
1
0.8
0.6
0.4
Upper-side
0.2
Lower-side
0
-30
0
30
60
TEMPERATURE (˚C)
Figure 15 Output on Resistance
vs Temperature (VCC=12V)
90
120
-30
0
30
60
90
120
TEMPERATURE (˚C)
Figure 16 Diode Forward Voltage
vs Temperature (VCC=12V)
7/17
LV8548MC Application Note
Pin function
Pin No.
1
2
Pin name
VCC
Pin function
Power-supply voltage pin.
VCC voltage is impressed. The permissible operation
voltage is from 4.0 to 16.0(V). The capacitor is connected for
stabilization for GND pin (6pin).
IN1
Motor drive control input pin.
Driving control input pin of OUT1 (10pin) and OUT2 (9pin). It
combines with IN2 pin (3pin) and it fights desperately. The
digital input it, range of the "L" level input is 0 to 0.7(V), range
of the "H" level input is from 1.8 to 5.5(V). PWM can be input.
Pull-down resistance 100(kΩ) is built into in the pin. It
becomes a standby mode because all IN1, IN2, IN3, and IN4
pins are made "L", and the circuit current can be adjusted to
0.
Motor drive control input pin.
Driving control input pin of OUT1 (10pin) and OUT2 (9pin). It
combines with IN1 pin (2pin) and it uses it. PWM can be
input. With built-in pull-down resistance.
3
IN2
4
IN3
Motor drive control input pin.
Driving control input pin of OUT3 (8pin) and OUT4 (7pin). It
combines with IN4 pin (5pin) and it uses it. PWM can be
input. With built-in pull-down resistance.
5
IN4
6
7
GND
OUT4
Motor drive control input pin.
Driving control input pin of OUT3 (8pin) and OUT4 (7pin). It
combines with IN3 pin (4pin) and it uses it. PWM can be
input. With built-in pull-down resistance.
Ground pin.
Driving output pin.
The motor coil is connected between terminal OUT3 (8pin).
8
OUT3
Equivalent Circuit
1KΩ
40KΩ
100KΩ
VCC
Driving output pin.
The motor coil is connected between terminal OUT4 (7pin).
9
OUT2
Driving output pin.
The motor coil is connected between terminal OUT1 (10pin).
10
OUT1
Driving output pin.
The motor coil is connected between terminal OUT2 (9pin).
OUT1
(OUT3)
OUT2
(OUT4)
GND
8/17
LV8548MC Application Note
Operation explanation
1. DCM output control logic
Input
Output
IN1
IN2
IN3
IN4
OUT1
OUT2
OUT3
OUT4
L
L
L
L
OFF
OFF
OFF
OFF
L
L
OFF
OFF
H
L
H
L
L
H
L
H
H
H
L
L
Remarks
Stand-by
Stand-by
Forward
1CH
Reverse
Brake
L
L
OFF
OFF
H
L
H
L
L
H
L
H
H
H
L
L
Stand-by
Forward
2CH
Reverse
Brake
2. About the switch time from the stand-by to the operation
When IN1, IN2, IN3, IN4 are "L", this IC has completely stopped operating. After the time of reset (about
7s of an internal setting) it shifts to a prescribed output status corresponding to the state of the input when
the signal enters the input terminal.
Reset of about 7s doesn't hang even if the motor is driven from the stand-by state when either CH drives
and the output becomes an output status corresponding to the state of the input. As for full power TR
between the reset time, turning off is maintained.
1ch Input ON
2ch Input ON
Input OFF
2ch Input ON
IN1
(IN2/IN4 always : for "L")
OUT1
1ch side Forward
7µs
(Reset time)
IN3
OUT3
2ch side Forward
Standby
Standby
There is no reset time
When another CH drive.
7µs
(Reset time)
Figure17 Switch time from the stand-by to the operation
3. Thermal shutdown function
The thermal shutdown circuit is incorporated and the output is turned off when junction temperature Tj
exceeds 180C. As the temperature falls by hysteresis, the output turned on again (automatic restoration).
The thermal shutdown circuit does not guarantee the protection of the final product because it operates
when the temperature exceed the junction temperature of Tjmax=150C.
TSD = 180C (typ)
TSD = 40C (typ)
4. Low voltage protection function
When the power supply voltage is as follows typical 3.5V, the output does OFF.
When the power supply voltage is as above typical 3.8V, the IC outputs a set state.
9/17
LV8548MC Application Note
Operation principal
 Full-Step Drive
Motor advances 90 degree by inputting 1 step.
Phase A +
Phase B +
(1)
Phase A +
Phase B –
(4)
90deg
(3)
(2)
Phase A –
Phase B –
Figure 19. Motor electric angle
(Full Step Drive)
Figure 18. Full-Step Timing

Phase A –
Phase B +
Half-Step Drive
Motor advances 45 degree by inputting 1 step.
Phase A +
Phase B –
Phase A +
Phase B OFF
Phase A +
Phase B +
(1)
(2)
(8)
Phase A OFF
Phase B –
45deg
Phase A OFF
Phase B +
(7)
(3)
(6)
Phase A –
Phase B –
Figure 20. Half-Step Timing
(5)
Phase A –
Phase B OFF
(4)
Phase A –
Phase B +
Figure 21. Motor electric angle
(Half Step Drive)
10/17
LV8548MC Application Note
Application Circuit Example
1. Example of applied circuit when two DC motor driving
2. Example of applied circuit when one stepper motor driving
M
LV8548MC
C1
+
Logic input
3. Example of applied circuit when connecting it in parallel
The use likened to H-Bridge 1ch is shown possible in the figure below by connecting IN1 with IN3, IN2 with
IN4, OUT1 with OUT3, and OUT2 with OUT4. (IO max = 2.0A, Upper and lower total RON = 0.5)
* Bypass capacitor (C1) connected between VCC-GND of all examples of applied circuit recommends the electric field
capacitor of 0.1A to 10A.
Confirm there is no problem in operation in the state of the motor load including the temperature property about the value
of the capacitor.
Mount the position where the capacitor is mounted on nearest IC.
11/17
LV8548MC Application Note
Evaluation Board Manual
1. Evaluation Board circuit diagram
GND 6
IN4
5
IN3
4
OUT4 7
IN2
3
OUT3 8
IN1
2
OUT2 9
VCC
1
OUT1 10
Motor connection terminal
SW1 SW2 SW3 SW4
C1:10µF
VCC
(motor power supply)
VIN
(control power supply)
Bill of Materials for LV8548MC Evaluation Board
Footprint
Manufacturer
Manufacturer
Part Number
Substitution
Allowed
Lead
Free
SOIC10
ON
semiconductor
LV8548MC
No
Yes
SUN Electronic
Industries
50ME10HC
Yes
Yes
Switch
MIYAMA
MS-621-A01
Yes
Yes
Test points
MAC8
ST-1-3
Yes
Yes
Designator
Qty
Description
IC1
1
Motor Driver
C1
1
VCC Bypass
capacitor
SW1-SW4
4
TP1-TP12
12
Value
10µF
50V
Tol
±20%
12/17
LV8548MC Application Note
2. Two DC motor drive
M
M
C1:VCC Bypass capacitor
（Electrolytic capacitor）
10µF
“VCC”
Power Supply
“VIN”
Power Supply
Logic input
 Connect OUT1 and OUT2, OUT3 and OUT4 to a DC motor each.
 Connect the motor power supply with the terminal VCC, the control power supply with the terminal VIN.
Connect the GND line with the terminal GND.
 DC motor becomes the predetermined output state corresponding to the input state by inputting a signal
such as the following truth value table into IN1~IN4.
 See the table in p.8 for further information on input logic.
When you drive DC motor with LV8548MC, caution is required to switch motor rotation from forward to reverse
because when doing so, electromotive force (EMF) is generated and in some cases, current can exceed the
ratings which may lead to the destruction and malfunction of the IC .
Coil current (lout) for each operation is obtained as follows when switching motor rotation from forward to
reverse.
 Starting up motor operation
Coil current Iout = ( VCC – EMF ) / coil resistance
At startup, Iout is high because EMF is 0. As the motor starts to rotate, EMF becomes higher and Iout
becomes lower.
 When switching motor rotation from forward to reverse:
Coil current Iout = ( VCC + EMF ) / coil resistance
When EMF is nearly equal to VCC at a max, make sure that the current does not exceed Iomax since a
current which is about double the startup current may flow at reverse brake.
 Short brake:
Coil current: Iout = EMF / coil resistance
Since EMF is 0 when the rotation of motor stops, Iout is 0 as well.
When you switch motor rotation form forward to reverse, if Iout is higher than Iomax, you can operate short
brake mode between forward and reverse either to slow down or stop the motor.
T=200ms/div
T=200ms/div
IOUT
(200mA/div)
IOUT
(200mA/div)
Inrush current
Inrush current
IN1
(5V/div)
IN1
(5V/div)
IN2
(5Vdiv)
IN2
(5Vdiv)
Short Brake MODE
Figure22 Without Break MODE
Figure23 With Break MODE
13/17
LV8548MC Application Note
Input and output characteristics of H-Bridge
LV8548MC can be driven by direct PWM control of H-Bridge by inputting PWM signal to IN.
However output response of H-Bridge worsens around On-duty 0%, which generates dead zone. As a result,
IC control loses lineality.
If you intend to drive motor in such control range, make sure to check the operation of your motor.
Input-Output Characteristics of H-Bridge (reference data)
Forward/Reverse⇔Brake
Vcc=12V
Figure24 Measurement connection diagram
12
Output Voltage （V)
8
4
0
-100
-75
-50
-25
-4
0
25
50
75
100
200KHz
100KHz
20KHz
-8
-12
PWM ON Duty（%）
Reverse
Forward
Figure 25 Input and Output Characteristics of H-Bridge
Output Voltage （V)
1.2
0.8
0.4
0
-15
-12
-9
-6
-3
0
-0.4
-0.8
3
6
9
12
15
200KHz
100KHz
20KHz
-1.2
PWM ON Duty（%）
Figure 26 Input and Output Characteristics of H-Bridge
(At the time of microinput)
14/17
LV8548MC Application Note
3. One stepper motor drive
 Connect a stepper motor with OUT1, OUT2, OUT3 and OUT4.
 Connect the motor power supply with the terminal VCC, the control power supply with the terminal VIN.
Connect the GND line with the terminal GND.
 STP motor drives it in a Full-Step, Half-Step by inputting a signal such as follows into IN1~IN4.
 For input signal to function generator, refer to p.9.
To reverse motor rotation, make sure to input signal to outward direction.
Waveform of LV8548MC evaluation board when driving stepper motor

Full-Step Drive
LV8548MC Full-Step VCC=12V 200pps
LV8548MC Full-Step VCC=12V 500pps
T=5ms/div
*1
IOUT1
500mA/div
VOUT1
10V/div
IN1
5V/div
IN2
5V/div
T=2ms/div
IOUT1
500mA/div
VOUT1
10V/div
IN1
5V/div
IN2
5V/div
*1. When the motor rotation is at a high speed, current gradient increases by the inductance of motor (L).
15/17
LV8548MC Application Note

Half-Step Drive
LV8548MC Half-Step VCC=12V 200pps
LV8548MC Half-Step VCC=12V 500pps
T=5ms/div
*2
IOUT1
500mA/div
IOUT1
500mA/div
*1
T=2ms/div
VOUT1
10V/div
VOUT1
10V/div
IN1
5V/div
IN2
5V/div
IN1
5V/div
IN2
5V/div
*1.With Half-Step mode, voltage kick-back and electromotive force occur in current OFF period.
*2.When the motor rotation is at a high speed, current gradient increases by inductance of motor (L).

IC surface temperature when a motor is in operation (reference)
80
500pps Full-Step
70
500pps Half-Step
Tc (degC)
60
200pps Full-Step
200pps Half-Step
50
40
30
20
10
0
0
20
40
60
t (sec)
80
100
120
[Stepper motor driven by LV8548MC]
Motor diameter: 20.5mm
Coil resistance: 30.8Ω
Figure27 Temp of Surface （ VM=12V, 500/200pps）
16/17
LV8548MC Application Note
ON Semiconductor and the ON logo are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC owns the rights to a number
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