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PDF LV8711T Data sheet ( Hoja de datos )
| Número de pieza | LV8711T | |
| Descripción | PWM Constant-Current Control Stepping Motor Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Ordering number : ENA1685
LV8711T
Bi-CMOS LSI
PWM Constant-Current Control
Stepping Motor Driver
http://onsemi.com
Overview
The LV8711T is a PWM constant-current control stepping motor driver.
Features
• Two circuits of PWM constant-current control H-bridge drivers incorporated
• Control of the stepping motor to 1-2 phase excitations possible
• Reference voltage output: 1.0V
• Short circuit protection circuit incorporated
• Abnormal condition warning output pin incorporated
• Upper and lower regenerative diodes incorporated
•Thermal shutdown circuit incorporated
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Motor supply voltage
Logic supply voltage
Logic input voltage
Output peak current
Output continuous current
Allowable power dissipation
Symbol
VM max
VCC max
VIN
IO peak
IO max
Pd max
Conditions
Per ch, tw ≤ 10ms, duty 20%
Per ch
*
Operating temperature
Storage temperature
Topr
Tstg
* Specified circuit board : 57.0mm×57.0mm×1.7mm, glass epoxy printed circuit board.
Ratings
18
6
6
1.0
800
1.45
-20 to +85
-55 to +150
Unit
V
V
V
A
mA
W
°C
°C
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.
Semiconductor Components Industries, LLC, 2013
June, 2013
33110 SY 20100310-S00001 No.A1685-1/12
1 page  
Pin Functions
Pin No. Pin Name
8 ATT1
9 ATT2
13 IN2B
14 IN2A
23 IN1B
24 IN1A
LV8711T
Pin Function
Energization current switching pin 1.
Energization current switching pin 2
Channel 2 driver output control input pin.
Channel 2 driver output control input pin.
Channel 1 driver output control input pin.
Channel 1 driver output control input pin.
VREG5
VCC
Equivalent Circuit
4 PS
Enable input pin.
GND
VCC
4
16 OUT2B
17 RNF2
18 OUT2A
20 OUT1B
21 RNF1
22 OUT1A
Channel 2 OUTB output pin.
Channel 2 current sensing resistor
connection pin.
Channel 2 OUTA output pin.
Channel 1 OUTB output pin.
Channel 1 current sensing resistor
connection pin.
Channel 1 OUTA output pin.
3 REG5
Internal reference voltage output pin.
GND
VM
22 18
20 16
GND
VCC
GND
21
17
3
Continued on next page.
No.A1685-5/12
5 Page 
Application Circuit Example
LV8711T
1 VM
2 NC
3 REG5
Logic input
4 PS
Abnomal condition sensing monitor
5 EMO
It is a pull-up resistor for
Abnomal condition
sensing monitor.
The setting range is
10k‰ to 100k‰
6 VREF
The REG1 voltage (1V) can be
used to set output current.
It can connect to VREF directly
or after divided with resistors.
The setting range (total) is
10k‰ to 100k‰
Please refer to P.7 for details.
7 REG1
8 ATT1
9 ATT2
It sets the PWM frequency.
The setting range is
100pF to 500pF
Please refer to P.8 for details.
220pF
10 CHOP
11 VCC
12 GND
IN1A 24
IN1B 23
OUT1A 22
RNF1 21
OUT1B 20
VMM 19
OUT2A 18
RNF2 17
OUT2B 16
PGND 15
IN2A 14
IN2B 13
Logic input
It is a resistor to detect output
current
The setting range is
0.1‰ to 1‰
Please refer to P.7 for details.
M
Logic input
Each constant setting method for the above circuit diagram example is as follows :
Current LIMIT (100%) set
VREF = 1.0V (when internal regulator output is connected)
ILIMIT = VREF / 5 / RNF resistance
= 1.0V / 5 / 0.47Ω = 425mA
Chopping frequency setting
Fchop = Ichop / (Cchop × Vt × 2)
= 10μA/ (220pF × 0.5V × 2) = 45 kHz
No.A1685-11/12
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet LV8711T.PDF ] | |
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