LV8080LP Motor Driver Application Note

LV8080LP
Bi-CMOS LSI
Two channels
Constant-current H-bridge
Driver
Application Note
http://onsemi.com
Overview
The LV8080LP is a two-channel constant-current driver that supports low-voltage operation. It is optimal for
constant-current drive of stepping motors (AF and zoom) in portable equipment such as camera cell phones.
Function
 Two channels constant-current H-bridge driver
 Built-in power supply switch and position detection comparator for use with a photoreflector
 Supports both 2-phase drive and 1-2 phase drive.
 Implemented in a low-power MOS IC process.
 Ultraminiature easy- to- solder VCT16 package (2.6 × 2.6mm)
 Built-in thermal protection and low-voltage sensing circuits
Typical Applications
 DSC
 Security Camera
 Pocket movie
 TOY
 POS, Card Reader
 Paintings and writings camera
Pin Assignment
(VCT16)
Semiconductor Components Industries, LLC, 2013
February, 2013
1/14
LV8080LP Application Note
Package Dimensions
unit : mm (typ)
TOP VIEW
SIDE VIEW
BOTTOM VIEW
(0.125)
(0.13)
2.6
16
0.4
2.6
(C0.116)
2
1
0.5
LASER MARKED
INDEX
(0.55)
0.25
(0.035)
0.8
SIDE VIEW
SANYO : VCT16(2.6X2.6)
Block Diagram
Constant-current calculation: IOUT = 0.1 ÷ RF Example : When an IOUT of 100mA is required, RF must be
1.
Usage Notes
The constant current is set by the resource RF connected between RFG and ground according to the
formula shown above.
2/14
LV8080LP Application Note
Application Circuit Example
1. Example of applied circuit with two DC motor driving
2. Example of applied circuit with one stepping
motor driving
3. Example of applied circuit when connecting 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, OUT2, and OUT4. (IO max = 0.8A, Upper and lower total RON = 1.35)
Specifications
Absolute Maximum Ratings at Ta = 25C
Parameter
Maximum supply voltage
Output voltage
Input voltage
Ground pin source current
Allowable power dissipation
Symbol
Conditions
VCC, VM max
VOUT max
VIN max
IGND
Pd max
OUT1, OUT2, OUT3, OUT4
CONT, IN
Per channel
Mounted on a circuit board.*
Ratings
Unit
6.5
V
6.5
V
-0.3 to +6.5
V
400
mA
700
mW
Operating temperature
Topr
-30 to +85
C
Storage temperature
Tstg
-40 to +150
C
* Specified circuit board : 40500.8mm3 : 4-layer (2S2P) glass epoxy printed circuit 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.
3/14
LV8080LP Application Note
Recommended Operating Conditions at Ta = 25C
Ratings
Parameter
Symbol
Conditions
Unit
min
Supply voltage
VCC
High-level input voltage
VIH
Low-level input voltage
VIL
CONT, IN
typ
max
2.5
6.0
V
0.6VCC
0.6VCC<
V
0.2VCC
V
Electrical Characteristics at Ta  25C, VCC = 3.0V
Ratings
Parameter
Symbol
Conditions
Unit
min
Current drain
Output on resistance
typ
max
ICCO
EN = 0V
0.1
1
A
ICCO1
EN = 3V
0.7
1
mA
VCC = 3.0V (High and low side total)
2.0
3.0

1.50
2.0

95
100
105
mA
190
200
210
mA
1.3
3
s
0.25
0.65
s
1.0
1.06
V
Ron1
EN = 3.0V, IOUT = 100mA
Ron2
VCC = 5.0V (High and low side total)
EN = 5.0V, IOUT = 100mA
Constant-current output 1
IOUT1
Between RFG and ground : 1
Constant-current output 2
IOUT2
Between RFG and ground : 0.5
(Design specification)
Output turn-on time
Traise
With RFG1 and RFG2 shorted to ground
(Design specification)
Output turn-off time
Tfall
With RFG1 and RFG2 shorted to ground
(Design specification)
Position detection voltage
VH
(high level)
Position detection voltage
VL
0.74
0.8
HYS
0.165
0.18
V
(low level)
Detection voltage hysteresis
PI/PR pin current
0.195
IPI/PR
Input current
IIN
VIN = 3V
15
V
20
mA
30
A
Note : The design specification items are design guarantees and are not measured.
1.00E-03
8.00E-07
8.00E-04
6.00E-07
6.00E-04
ICC (A)
ICC0 (A)
1.00E-06
4.00E-07
4.00E-04
2.00E-07
2.00E-04
0.00E+00
0.00E+00
0
1
2
3
4
5
6
1
2
3
5
6
VCC (V)
Figure2 Current Drain
vs VCC Voltage
2.5
2
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1
2
Ron (Ω)
Ron (Ω)
VCC (V)
Figure1 Current Drain
vs VCC Voltage
4
0
1.5
VCC=3V
1
VCC=5V
0.5
0.1
VCC=3V
VCC=5V
0.2
0.3
0.4
Iout (A)
Figure3 Output on Resistance
vs Output Current
0.5
-40
-20
0
20
40
60
80
100
120
Iout (A)
Figure4 Output on Resistance
vs Output Current
4/14
140
LV8080LP Application Note
3.5
0.105
0.104
0.103
0.102
0.101
0.1
0.099
0.098
0.097
0.096
0.095
3
Io(A)
VCOMPOUT(V)
2.5
2
1.5
1
0.5
0
1
2
3
4
5
0.7
6
0.8
Ron (Ω)
10
VCC=3V
VCC=5V
5
0
0.002
0.004
0.006
0
1
2
Iout (A)
0.105
20
0.1
VCC=3V
Ron (Ω)
25
IoCT (A)
0.11
3
4
0.09
-20
0
20
40
60
80
Iout (A)
Figure9 Constant current
vs Ambient temprature
5
6
15
VCC=3V
10
VCC=5V
-40
1.2
VIN (V)
Figure8 INPUT Current
vs INPUT Voltage
Figure7 PIPR on Resistance
vs PIPR Current
0.095
1.1
IIN (A)
4.00E-05
3.50E-05
3.00E-05
2.50E-05
2.00E-05
1.50E-05
1.00E-05
5.00E-06
0.00E+00
15
1
VCOMPIN (V)
Figure6 COMP OUTPUT voltage
vs COMP VIN Voltage
VCC (V)
Figure5 OUTPUT constantCurrent
vs VCC Voltage
20
0.9
100 120 140
VCC=5V
5
-40
-20
0
20
40
60
80
100
120
140
Iout (A)
Figure10 PIPR on Resistance
vs Ambient temperature
5/14
LV8080LP Application Note
 Example of Turn-on and Turn-off output waveform
VCC = 5V, VIN1 = 100kHZ, 5V, duty50%, VIN2 = 0 input
VCC = 3V, VIN1 = 100kHZ, 3V, duty50%, VIN2 = 0V input
RFG-GND shorted load is 10kohm pullup & down (Fast decay)
RFG-GND shorted load is 10kohm pullup & down (Fast decay)
VCC = 5V, VIN1 = 100kHZ, 5V, duty50%,VIN2 = 5V input
RFG-GND shorted load is 10kohm pullup & down (Slow decay)
VCC = 3V, VIN1 = 100kHZ, 3V, duty50%, VIN2 = 3V input
RFG-GND shorted load is 10kohm pullup & down (Slow decay)
6/14
LV8080LP Application Note
Pin Description
Pin No.
Pin Name
Description
1
OUT1
2
OUT2
H-bridge type output pins
3
OUT3
Pins 1 and 2 are paired; and pins 3 and 4 are paired.
4
OUT4
5
RFG2
16
RFG1
Equivalent Circuit
1-4 : Output pins
5, 16 : Current sensing resistor connection pins
Connect the current sensing resistor between these
pins and ground to detect the output currents for
constant current control.
Pin 16 corresponds to the output from pins 1 and 2 and
pin 5 to the output from pins 1 and 2.
6
IN3
7
IN4
Logic input pins
8
IN1
9
IN2
10
CONT
11
GND
Ground
12
COMPIN
Photo reflector position sensing comparator input
13
COMPOUT
Photo reflector position sensing comparator output
This pin serves as an open-collector output of the NPN
transistor.
Continued on next page.
7/14
LV8080LP Application Note
Continued from preceding page.
Pin No.
Pin Name
14
PI/PR
Description
Equivalent Circuit
A switch, with NMOS open-drain output, used to turn
on/off the power supply of the position sensor unit. When
using this switch, connect the position sensor unit
between this pin and the VCC pin.
On/off control of this switch is accomplished by CONT
pin. Setting the CONT pin high turns on the switch.
15
VCC
Power supply pin
Operation explanation
1. LV8080LP Input-Output-Logic
Truth Table
Input
Output
Mode
IN1
IN2
IN3
IN4
Low
Low
Low
Low
Low
High
High
Low
High
High
-
-
-
-
Low
High
High
Low
High
High
OUT1
OUT2
OUT3
OUT4
Off
Off
Off
Off
Off
Off
Low
High
High
Low
Low
Low
Off
Off
Standby mode
Channel 1, reverse
Channel 1, forward
Channel 1, brake mode
Low
High
Channel 2, reverse
High
Low
Channel 2, forward
Low
Low
Channel 2, brake mode
Note : The "-" input unstable state. When off, a high-impedance state.
• The ENA goes to the standby state with a low-level input, and to the operating state with a high-level input.
• The control input switches the forward/reverse mode.
2. DC motor operation sequence
 The following chart shows the DC-motor sequence from Standby, Forward, Reverse, Brake, and Forward.
When IN1, IN2, IN3, IN4 are "L", the operation of LV8080 is stopped.
Please set standby mode for 10usec between Forward and Reverse mode,
Likewise, please set standby mode for 10usec between Forward and Brake mode, as well as Reverse and
Brake mode.
8/14
LV8080LP Application Note
3. Stepping motor operation Sequence
Example of current wave type in each excitation mode when stepping motor parallel input is controlled.
2- phase excitation
1-2 phase excitation
STEP
STEP
STEP
STEP
STEP
STEP
Theory
 Full-Step MODE
The motor moves 90 degrees in an electric corner when I input 1Step.
Phase A +
Phase B +
Phase A +
Phase B –
Steps by 90deg
①
④
IN1
IN2
IN3
90deg
IN4
④
＋
①
②
③
④
OUT1→2
V OUT1
IOUT1
①
(PhaseA)
OUT2→1
ー
＋
OUT3→4
V OUT3
IOUT1
(PhaseB)
③
OUT3→4
OUT4→3
ー
Inwards →
←　Outwards
②
Phase A –
Phase B –
Phase A –
Phase B +
STEP
STEP
STEP
STEP
STEP
STEP
STEP
STEP
STEP
STEP
Half-Step MODE
The motor moves 45 degrees in an electric corner when I input 1Step
STEP

②
OUT1→2
Phase A –
Phase B –
Steps by 45deg
Phase A +
Phase B OFF
①
⑧
IN1
IN2
Phase A +
Phase B +
②
45deg
Phase A OFF
Phase B –
IN3
⑦
IN4
IOUT
⑧
＋
V OUT1
IOUT
(PhaseA)
ー
＋
V OUT2
(PhaseB)
Phase A OFF
Phase B +
①
②
③
④
⑤
⑥
⑦
OUT1→2
⑧
①
②
③
③
OUT1→2
OFF
OUT2→1
OFF
OFF
OUT1→2
OFF
ー
←　Outwards
Outward
OUT1→2
OFF
OUT2→1
⑥
OFF
Inwards →
Inward
Phase A –
Phase B –
⑤
Phase A –
Phase B OFF
④
Phase A –
Phase B +
9/14
LV8080LP Application Note
4. Constant current
 Constant current is obtained as follows: IOUT = 0.1 ÷ RF
(Example: When IOUT of 100mA is required, RF must be 1. RF is the sense resistor as shown in
p.3)
 The constant current is set by the resistor RF connected between RFG and ground.
5. Photosensor Position Detection Application Circuit Example
(a) Application circuit
(b) Timing chart
10/14
LV8080LP Application Note
6. Thermal shutdown circuit
The thermal shutdown circuit in incorporated and the output is turned off when junction temperature Tj
exceeds 175C and
the abnormal state warning output is turned on. 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 = 175C (typ)
TSD = 30C (typ)
7. Low voltage protection function
When the VCC voltage is below the typical 2.4V in LV8080LP, OUT1 through OUT4 are turned off.
When the VCC voltage is above the typical 2.55V, OUT1 through OUT4 are turned on.
*When thermal shutdown function or low voltage protection function is activated, OUT1 through OUT4 are
turned off under the control of the internal circuit. However, the output (PI) of photo sensor driving transistor
continues operation.
Evaluation Board Manual
1. Eva-Board circuit diagram
Bill of Materials for LV8080LP Evaluation Board
Designator
Qty
Description
Value
IC1
1
Motor Driver
R1
2
Current detect
resistance
Carbon
1Ω
(1W/4)
C2
1
VCC Bypass
Capacitor
0.1µF
100V
TP1-TP14
14
Test points
Tol
Footprint
Manufacturer
Manufacturer
Part Number
Substitution
Allowed
Lead
Free
VCT16
(2.6X2.6)
ON
Semiconductor
LV8080LP
No
Yes
Murata
GRM188R72A10
4KA35D
Yes
Yes
MAC8
ST-1-3
Yes
Yes
11/14
LV8080LP Application Note
2-1．Eva-Board Photograph
(1) Two DC motor drive
 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 an input
signal such as the following truth value table into IN1~IN4.
(2) One stepping motor drive
 Connect a stepping 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 2-phase excitation, 1-2 phase excitation by inputting an input signal such as follows
into IN1~IN4.
Waveform of LV8080LP evaluation board when driving stepping motor
 Full-Step Drive
VCC = 3.3V 1000pps
12/14
LV8080LP Application Note
 Half-Step Drive
VCC = 3.3V
2000pps
Recommended Soldering Footprint
13/14
LV8080LP Application Note
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