LV8736V Ver la hoja de datos (PDF) - ON Semiconductor
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LV8736V Datasheet PDF : 26 Pages
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LV8736V
Description of operation
1.Input Pin Function
Each input terminal has the function to prevent the flow of the current from an input to a power supply.
Therefore, Even if a power supply(VM) is turned off in the state that applied voltage to an input terminal, the electric
current does not flow into the power supply.
1-1) Chip enable function
This IC is switched between standby and operating mode by setting the ST pin. In standby mode, the IC is set to
power-save mode and all logic is reset. In addition, the internal regulator circuit and charge pump circuit do not
operate in standby mode.
ST
Mode
Internal regulator
Charge pump
Low or Open
Standby mode
Standby
Standby
High
Operating mode
Operating
Operating
1-2) Drive mode switching pin function
The IC drive mode is switched by setting the DM pin. In STM mode, stepper motor channel 1 can be controlled by the
CLK-IN input. In DCM mode, DC motor channel 2 or stepper motor channel 1 can be controlled by parallel input.
Stepper motor control using parallel input is Full step or Half step full torque.
DM
Drive mode
Application
Low or Open
STM mode
Stepper motor channel 1 (CLK-IN)
High
DCM mode
DC motor channel 2 or stepper motor channel 1 (parallel)
2.STM mode (DM = Low or Open)
2-1) STEP pin function
Input
ST
STP
Low
*
High
High
Operating mode
Standby mode
Excitation step proceeds
Excitation step is kept
2-2) Excitation mode setting function
MD1
MD2
Excitation mode
Initial position
Channel 1
Channel 2
Low
Low
Full step excitation
100%
-100%
High
Low
Half step excitation
100%
0%
Low
High
Quarter step excitation
100%
0%
High
High
1/8 step 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.
2-3) 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 "Examples of current waveforms in each of the excitation modes.")
No.A1785-10/26
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