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LV8712T PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 LV8712T
기능 PWM Constant-Current Control Stepping Motor Driver
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LV8712T 데이터시트, 핀배열, 회로
Ordering number : ENA1674A
LV8712T
Bi-CMOS LSI
PWM Constant-Current Control
Stepping Motor Driver
http://onsemi.com
Overview
The LV8712T is a stepping motor driver of the micro-step drive corresponding to supports 2W 1-2 phase excitation. It
is the best for the drive of the stepping motor for a scanner and a small printer.
Features
Single-channel PWM constant-current control stepping motor driver incorporated.
Excitation mode can be set to 2-phase, 1-2 phase, W1-2 phase , or 2W1-2 phase
Microstep can control easily by the CLK-IN input.
Power-supply voltage of motor
: VM max = 18V
Output current
: IO max = 0.8A
Output ON resistance
: RON = 1.1(upper and lower total, typical, Ta = 25°C )
A thermal shutdown circuit and a low voltage detecting circuit are built into.
Specifications
Absolute Maximum Ratings at Ta = 25°C
Parameter
Motor supply voltage
Logic supply voltage
Output peak current
Output continuousness current
Logic input voltage
Allowable power dissipation
Operating temperature
Storage temperature
Symbol
VM max
VCC max
IO peak
IO max
VIN
Pd max
Topr
Tstg
Conditions
Each 1ch, tw 10ms, duty 20%
Each 1ch
*
* Specified circuit board : 57.0mm×57.0mm×1.7mm, glass epoxy 2-layer board.
Ratings
18
6
1.0
800
-0.3 to VCC + 0.3
1.35
-20 to +85
-55 to +150
Unit
V
V
A
mA
V
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
20211 SY/51210 SY 20100216-S00005 No.A1674-1/14




LV8712T pdf, 반도체, 판매, 대치품
Block Diagram
LV8712T
No.A1674-4/14

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LV8712T 전자부품, 판매, 대치품
LV8712T
Description of operation
Stepping motor control
(1) Power save function
This IC is switched between standby and operating mode by setting the PS pin. In standby mode, the IC is set to
power-save mode and all logic is reset. In addition, the internal regulator circuit do not operate in standby mode.
PS
Mode
Internal regulator
Low or Open
Standby mode
Standby
High
Operating mode
Operating
(2) The order of turning on recommended power supply
The order of turning on each power supply recommends the following.
VCC power supply order VM power supply order PS pin = High
It becomes the above-mentioned opposite for power supply OFF.
However, the above-mentioned is a recommendation, the overcurrent is not caused by not having defended this, and
IC is destroyed.
(3) STEP pin function
Input
PS STP
Low *
High
High
Operating mode
Standby mode
Excitation step proceeds
Excitation step is kept
(4) Excitation mode setting function(initial position)
MD1
MD2
Excitation mode
Initial position
Channel 1
Channel 2
Low Low 2 phase excitation
100%
-100%
High
Low 1-2 phase excitation
100%
0%
Low
High
W1-2 phase excitation
100%
0%
High
High
2W1-2 phase excitation
100%
0%
This is the initial position of each excitation mode in the initial state after power-on and when the counter is reset.
(5) Position detection monitoring function
The MONI position detection monitoring pin is of an open drian type.
When the excitation position is in the initial position, the MONI output is placed in the ON state.
(Refer to "(12) Examples of current waveforms in each of the excitation modes.")
No.A1674-7/14

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