LV8417CS Motor Driver IC Application Note

LV8417CS
Bi-CMOS integrated circuit
Forward/Reverse Motor Driver
Application Note
http://onsemi.com
Overview
The LV8417CS is a 1ch H bridge motor driver IC. The package size is extremely small with wafer level
package (WLP). Moreover, the on-resistance is low (upper and lower total 0.27Ω typ.).
The H bridge of this IC is P-N composition and thereby reduces the external parts without need of charge
pump. Therefore, LV8417CS realizes reduction of mounting area which enables lower cost and smaller
application size.
Function
 DMOS output transistor adoption
(Upper and lower total RON = 0.27Ωtyp)
 The application voltage range is wide (2.0V to 10.5V).
 Iomax=1.0A (t≦100ms 2.0A, t≦10ms 3.8A)
 The compact package is adopted.
 Current consumption 0 when standing by
 Built-in brake function
Typical Applications
 Camera
 Portable device
 TOY
Pin Assignment
0.5mm
WLP9 (1.47×1.47)
Semiconductor Components Industries, LLC, 2013
December, 2013
1/12
LV8417CS Application Note
Package Dimensions
unit: mm (typ)
SIDE VIEW
BOTTOM VIEW
0.235
TOP VIEW
3
2
1
0.27
0.5
C
B
1.47
A
1.47
0.235
0.55 MAX
0.08
(0.42)
0.5
SIDE VIEW
SANYO : WLP9(1.47X1.47)
Caution: The package dimension is a reference value, which is not a guaranteed value.
Block Diagram
Start
control
block
Thermal
shutdown
circuit
Low
voltage
protection
circuit
Motor control
logic
Figure1 DC motor drive
2/12
LV8417CS Application Note
Specifications
Maximum Ratings at Ta = 25C, SGND = PGND = 0V
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage (for load)
Vmmax
-0.5 to 12.6
V
Supply voltage (for control)
Vccmax
-0.5 to 6.0
V
Output current
Iomax
1.0
A
Output peak current1
Iopeak1
t≤100mS
2.0
A
Output peak current2
Iopeak2
t≤10mS
3.8
A
Input voltage
VINmax
-0.5 to VCC+0.5
V
Operating temperature
Topr
-20 to +85
°C
Storage temperature
Tstg
-55 to 150
°C
Allowable power dissipation
Pd
0.85
W
*
* Mounted on a specified 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 Conditions at Ta  25C
Parameter
Supply voltage (VM pin)
Symbol
VM
Supply voltage (VCC pin)
VCC
Input signal voltage
VIN
Input signal frequency
fmax
Conditions
Ratings
min
typ
max
Unit
2.0
10.5
V
2.7
5.5
V
0
VCC
V
200
kHz
3/12
LV8417CS Application Note
Electrical Characteristics at Ta=25°C and VCC=3.0V, VM=6.0V, SGND=PGND=0V (unless otherwise noted)
Parameter
Symbol
Standby load power supply current
IMO
Conditions
IM1
EN=3V No loading
Standby control power supply current
ICO
EN=IN1=IN2=0V
Operating consumption current
IC1
EN=3V No loading
VIH
2.7V≤VCC≤5.5V
VIL
2.7V≤VCC≤5.5V
High-level input current 1
(ENA, IN1, IN2)
IIH1
VIN=3V
Low-level input current 1
(ENA, IN1, IN2)
IIL1
VIN=0V
Pull down resistance
RDN
EN,IN1,IN2
Output block on- resistance
RON
Sum of top and bottom
on-resistance
Low voltage detection operation voltage
VCS1
Watching VCC pin voltage
Low voltage detection unlock voltage
VCS2
Watching VCC pin voltage
Thermal shutdown operating
temperature
Tth
*Design-guaranteed
Low-level input voltage
Output block
Turn on time
Output response time H
Typ.
EN=0V
Operating consumption current
High-level input voltage
Min
80
0.5
Max
Unit
1
μA
(1)
120
μA
(3)
1
μA
(2)
0.8
mA
(3)
0.6
x VCC
VCC
V
0
0.2
x VCC
V
30
μA
20
-1
100
TPLH
No loading
TIOH
No loading
*Design-guaranteed
Turn off time
TPHL
No loading
Output response time L
TIOL
No loading
*Design-guaranteed
Note
μA
(4)
(4)
200
400
kΩ
(4)
0.27
0.4
Ω
(5)
2.1
2.3
2.5
V
(6)
2.3
2.5
2.7
V
(6)
150
180
210
°C
(7)
0.1
0.15
μS
(8)
0.23
0.35
μS
(9)
0.1
0.15
μS
(8)
0.25
0.38
μS
(9)
*Notes
(1) Current consumption when output at VM pin is OFF.
(2) Current consumption when output at VCC pin is OFF.
(3) Current consumption of VCC pin when ENA = 3V (at IC start-up).
(4) Pin ENA and IN1 are pulled down by resistor.
(5) This value represents the sum of upper and lower saturation voltage of OUT pin divided by current.
(6) All the power transistors are turned off if a low VCC condition is detected.
(7) All the power transistors are turned off if the thermal protection circuit is activated.
They are turned on again as the temperature decreases.
(8) Turn off time represents rise time from 10 to 90% and fall time from 90 to 10%. (Figure2)
(9) Output response time represents the time between the change of input pin voltage by 50% and the change
of OUT pin voltage by 10%. (Figure2)
IN
50%
50%
90%
90%
OUT
10%
TIOH
10%
TPLH
TIOL
TPHL
Figure2 Output block time chart
4/12
1
1
0.8
0.8
0.6
0.6
ICC0 (μA)
IM0 (μA)
LV8417CS Application Note
0.4
0.2
0
0.4
0.2
0
-0.2
-0.2
2
3
4
5
6
7
8
9
10
2.7
100
1
80
0.8
4.2
4.7
5.2
0.6
60
40
20
0.4
0.2
0
0
-0.2
2
3
4
5
6
7
8
9
2.7
10
VM (V)
Figure 5 VM Operating Consumption
Current vs VM Voltage
3.2
3.7
4.2
4.7
5.2
VCC (V)
Figure 6 VCC Operating Consumption
Current vs VCC Voltage
7
45
40
35
30
25
20
15
10
5
0
6
5
VOUT (V)
IIN (μA)
3.7
VCC (V)
Figure 4 Standby Control Power Supply
Current vs VCC Voltage
ICC1 (mA)
IM1 (μA)
VM (V)
Figure 3 Standby Load Power Supply Current
vs VM Voltage
3.2
4
3
Operation
Voltage
2
Release
Voltage
1
0
0
1
2
3
4
VIN (V)
Figure 7 Input Supply current vs
Vin Voltage
5
6
0
1
2
3
4
5
VCC(V)
Figure 8 Low Voltage Protection Function
Voltaage vs VCC Voltage
5/12
7
0.40
6
0.35
5
0.30
4
Ron (Ω)
VOUT (V)
LV8417CS Application Note
3
0.25
0.20
0.15
2
0.10
OUT1→OUT2
1
0.05
OUT2→OUT1
0
0.00
0
1
2
3
4
0
5
0.4
0.6
0.8
1
Iout (A)
Figure 10 Output on Resistance vs
Output Current (VM=6V, VCC=3V)
1.2
1.0
1
0.8
Ioleak Pch
0.8
0.6
Ioleak Nch
Ioleak (µA)
VD (V)
VIN (V)
Figure 9 Input "H" Level Voltage
vs VIN Voltage
0.2
0.6
0.4
Upper-side
0.2
0.4
0.2
0.0
Lower-side
0
-0.2
0
0.2
0.4
0.6
0.8
1
ID(A)
Figure 11 Diode Forward Voltage
vs ID Current
2
3
4
5
6
7
8
9
10
VM (V)
Figure 12 Output Leak Current
vs VM Voltage
Upper-side
Lower-side
Total
0.40
0.35
Ron (Ω)
0.30
0.25
0.20
0.15
0.10
0.05
0.00
-20
0
20
40
60
80
TEMPERATURE (C)
Figure 13 Output on Resistance
vs Junction Temperature (VM=6V, VCC=3V)
6/12
LV8417CS Application Note
Pin function
No.
C-3
Name
ENA
Description
Equivalent circuit diagram
Logic enable pin
(built-in pull down resistor)
B-3
IN1
Driver output switching pin
A-3
IN2
Driver output switching pin
C-2
VCC
Supply pin for control
B-2
SGND
GND pin for control
A-2
VM
Supply pin for load
C-1
OUT1
Driver output pin
A-1
OUT2
Driver output pin
B-1
PGND
GND pin for load
Operation explanation
1. Truth value table
ENA
IN1
IN2
OUT1
OUT2
MODE
H
H
H
L
L
Brake
H
L
H
L
Forward
L
H
L
H
Reverse
L
L
Z
Z
Standby
L
Z
Z
Standby
-: Ignore Z: High-Impedance
* Current consumption is zero during standby mode.
* At low voltage and thermal shutdown, all the power transistors are OFF and the motor rotation is stopped.
2. 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 = 30C (typ)
3. Low voltage protection function
When the VCC power supply voltage is as follows typical 2.3V, the output does OFF.
When the VCC power supply voltage is as above typical 2.5V, the IC outputs a set state.
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LV8417CS Application Note
Application Circuit Example
1. Example of applied circuit when DC motor driving
* 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.
8/12
LV8417CS Application Note
Evaluation Board Manual
1. Evaluation Board circuit diagram
Motor connection terminal
OUT2
OUT1
OUT1
PGND
OUT2
VCC
SGND
VM
ENA
IN1
IN2
SW1
SW2
C1:10µF
SW3
VCC
(Control power supply)
VM
(Motor power supply)
VIN
(Switch power supply)
ENA
IN1
IN2
Logic input
Bill of Materials for LV8417CS Evaluation Board
Footprint
Manufacturer
Manufacturer
Part Number
Substitution
Allowed
Lead
Free
WLP
(1.47x1.47)
ON
Semiconductor
LV8417CS
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-SW3
3
TP1-TP9
9
Tol
10µF
50V
±20%
Pd max - Ta
1.5
Allowable power dissipation, Pdmax - W
Value
Specified circuit board:
57.0 x 57.0 x 1.6mm 3
Two layer glass epoxy board
1.0
0.85
0.5
0.44
0.0
-20
0
20
40
60
80
100
Ambient temperature, Ta - C
9/12
LV8417CS Application Note
2. DC motor drive
 Connect OUT1 and OUT2, to a DC motor each.
 Connect the motor power supply with the terminal VM, the control power supply with the terminal VCC, the
switch 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/IN2.
 See the table in p.7 for further information on input logic.
When you drive DC motor with LV8417CS, 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 = ( VM – 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 = ( VM + EMF ) / coil resistance
When EMF is nearly equal to VM 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=50ms/div
T=50ms/div
IOUT
(100mA/div)
Inrush current
Coil current Iout
when switching from
forward to reverse
IOUT
(100mA/div)
Inrush current
IN2
(2Vdiv)
IN2
(2Vdiv)
IN1
(2V/div)
Figure14 Without Break MODE
IN1
(2V/div)
Short Brake MODE
Figure15 With Break MODE
10/12
LV8417CS Application Note
Input and output characteristics of H-Bridge
LV8417CS 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
VM=6.0V, VCC=3.0V
Output Voltage (V)
6
4
Forward
2
0
-100
-75
-50
-25
0
25
50
75
-2
Reverse
100
200KHz
100KHz
-4
20KHz
-6
PWM ON Duty (%)
Figure 16 Input and Output Characteristics of H-Bridge
Output Voltage (V)
1
0.6
0.2
-15
-12
-9
-6
-3
0
-0.2
-0.6
3
6
9
12
15
200KHz
100KHz
20KHz
-1
PWM ON Duty (%)
Figure 17 Input and Output Characteristics of H-Bridge
(At the time of microinput)
11/12
LV8417CS Application Note
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