LV8728MR
Stepper Motor Driver,
PWM, Constant-Current Control,
1/128 step
Overview
The LV8728MR is a PWM current-controlled micro step stepper motor
driver. This driver can perform eight types of excitation mode from Full step
to 1/128 step and can drive simply by the CLK input.
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Function
Single-channel PWM current control stepper motor driver
BiCDMOS process IC
Output on-resistance (upper side: 0.3 ; lower side: 0.25 ; total of upper
and lower: 0.55 ; Ta = 25C, IO = 2.0A)
Full, Half, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128 step excitation mode are
selectable
Advance the excitation step with the only step signal input
Available forward reverse control
I
O
max = 2.0A
Over-current protection circuit
Thermal shutdown circuit
Input pull down resistance
With reset pin and enable pin.
MFP30KR (375mil)
ORDERING INFORMATION
Ordering Code:
LV8728MR-AH
Package
MFP30KR
(Pb-Free / Halogen Free)
Shipping (quantity/packing)
1000 / Tape & Reel
†
For information on tape and reel specifications, including part
orientation and tape sizes, please refer to our Tape and Reel
Packaging Specifications Brochure, BRD8011/D.
http://www.onsemi.com/pub_link/Collateral/BRD8011-D.PDF
Typical Applications
Printer (Multi-function printer, 3D printer, etc.)
Security camera
Scanner
Stage light
Maximum Ratings
(Note 1)
Parameter
Maximum supply voltage
Maximum output current
Maximum logic input voltage
Maximum VREF input voltage
Maximum MO input voltage
Maximum DOWN input voltage
Allowable power dissipation (Note 2)
Operating temperature
Storage temperature
Symbol
VM max
IO max
VIN max
VREF max
VMO max
VDOWN max
Pd max
Topr
Tstg
VM , VM1 , VM2
Per 1ch
ST , MD1 , MD2 , MD3 , OE , RST , FR ,
STEP
Conditions
Ratings
36
2.0
6
6
6
6
1.55
-30 to +85
-55 to +150
Unit
V
A
V
V
V
V
W
C
C
1.
Stresses exceeding those listed in the Absolute Maximum Rating table may damage the device. If any of these limits are exceeded,
device functionality should not be assumed, damage may occur and reliability may be affected.
2.
Specified circuit board: 76.1mm114.3mm1.6mm, glass epoxy board.
© Semiconductor Components Industries, LLC, 2016
1
April 2016 - Rev. 0
Publication Order Number:
LV8728MR/D
LV8728MR
Recommended Operating Ranges
(Note 3)
Parameter
Supply voltage range
Logic input voltage
Symbol
VM
VIN
VM , VM1 , VM2
ST , MD1 , MD2 , MD3 , OE , RST , FR , STEP
Conditions
Ratings
9 to 32
0 to 5
Unit
V
V
VREF input voltage range
VREF
0 to 3
V
3.
Functional operation above the stresses listed in the Recommended Operating Ranges is not implied. Extended exposure to stresses
beyond the Recommended Operating Ranges limits may affect device reliability.
Electrical Characteristics
at Ta=25°C, VM=24V, VREF=1.5V unless otherwise noted.
(Note 4)
Parameter
Standby mode current drain
Current drain
Thermal shutdown
temperature
Thermal hysteresis width
Logic pin input current
Symbol
IMst
IM
TSD
TSD
IINL
IINH
Logic input
voltage
High
Low
VINH
VINL
Vfdth
Vfdtm
Vfdtl
Fch
Iosc1
Vtup1
Vtdown1
Iref
VOlDOWN
VOlMO
Fdown
Iosc2
Vtup2
Vtdown2
Vreg1
Vreg2
Ronu
Rond
Output leakage current
Diode forward voltage
Current setting reference
voltage
IOleak
VD
VRF
IO = 2.0A, upper side ON resistance
IO = 2.0A, lower side ON resistance
VM = 36V
ID = -2.0A
VREF = 1.5V, Current ratio 100%
0.285
1.1
0.3
VREF = 1.5V
Idown = 1mA
Imo = 1mA
Cosc2 = 1500pF
1.12
7
0.8
0.3
4.7
18
Cosc1 = 100pF
70
7
0.8
0.3
-0.5
40
40
1.6
10
1
0.5
5
19
0.3
0.25
100
100
2.08
13
1.2
0.7
5.3
20
0.42
0.35
50
1.4
0.315
100
10
1
0.5
Conditions
ST = “L” , VM+VM1+VM2
ST = “H”, OE = “H”, no load
VM+VM1+VM2
Guaranteed by design
Guaranteed by design
ST , MD1 , MD2 , MD3 , OE , RST ,
FR , STEP , VIN = 0.8V
ST , MD1 , MD2 , MD3 , OE , RST ,
FR , STEP , VIN = 5V
ST , MD1 , MD2 , MD3 , OE , RST ,
FR , STEP
3
30
2.0
0
3.5
1.1
3.1
0.8
130
13
1.2
0.7
Ratings
min
typ
70
3.3
150
180
40
8
50
15
70
5.0
0.8
max
100
4.6
200
Unit
A
mA
C
C
A
A
V
V
V
V
V
kHz
A
V
V
A
mV
mV
Hz
A
V
V
V
V
Ω
Ω
A
V
V
FDT pin high level voltage
FDT pin middle level voltage
FDT pin low level voltage
Chopping frequency
OSC1 pin charge/discharge
current
Chopping oscillation circuit
threshold voltage
VREF pin input voltage
DOWN output residual voltage
MO pin residual voltage
Hold current switching
frequency
OSC1 pin charge/discharge
current
Hold current switching
frequency threshold voltage
VREG1 output voltage
VREG2 output voltage
Output on-resistance
4.
Product parametric performance is indicated in the Electrical Characteristics for the listed test conditions, unless otherwise noted.
Product performance may not be indicated by the Electrical Characteristics if operated under different conditions.
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2
LV8728MR
Package Dimensions
unit : mm
SOIC30 W / MFP30KR (375 mil)
CASE 751CH
ISSUE A
15.55 MAX
15.2
30
0.1
0~10
LASER MARKED
INDEX
(4.4)
0.1
7.9
10.5
0.3
(5.1)
1 2
(0.6)
1.0
0.35
−0.05
+0.15
0.25
0.15
+0.15
−0.05
0.1 (2.25)
2.45 MAX
S
0.10 S
SOLDERING FOOTPRINT*
(Unit: mm)
1.15
0.1
1.00
0.50
NOTE: The measurements are not to guarantee but for reference only.
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3
9.75
0.65
0.2
LV8728MR
Pin Assignment
1
2
3
4
5
6
7
8
9
VREG2
VM
OUT1A
PGND1
VM1
RF1
OUT1B
NC
OUT2A
VREG1 30
ST 29
MD1 28
MD2 27
MD3 26
OE 25
RST 24
GND 23
FR 22
STEP 21
OSC1 20
OSC2 19
FDT 18
DOWN 17
MO 16
10 RF2
11 VM2
12 PGND2
13 OUT2B
14 GND
15 VREF
Pd max – Ta
1.8
Allowable power dissipation, Pdmax - W
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-20
0
20
40
60
80
100
Ambient temperature, Ta -
C
0.416
Independent IC
0.8
0.806
Mounted on a board (76.1mm×114.3mm×1.6, Glass epoxy)
1.55
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4
LV8728MR
Block Diagram
VREG2
OUT1A
OUT1B
OUT2A
OUT2B
VM1
VM2
RF1
VM
Regulator 2
Output preamplifier
stage
Output preamplifier
stage
Output preamplifier
stage
Output preamplifier
stage
PGND1
PGND2
RF2
MO
VREG1
Regulator 1
Output control logic
VREF
Current select
circuit
Current select
circuit
DOWN
Oscillator
circuit
GND
TSD
UVLO
STEP
OE
ST
OSC2
RST
FDT
OSC1
MD1
MD2
MD3
FR
Decay Mode
setting circuit
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5
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