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STK672-432A-E bảng dữ liệu(PDF) 7 Page - ON Semiconductor

tên linh kiện STK672-432A-E
Giải thích chi tiết về linh kiện  2-phase Stepping Motor Driver
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nhà sản xuất  ONSEMI [ON Semiconductor]
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STK672-432A-E
No.A1586-7/21
• Motor current peak value IOH setting
[Smoke Emission Precuations]
If Pin 18 (S.G terminal) is attached to the PCB without using solder, overcurrent may flow into the MOSFET at
VCCON (24V ON), to emit smoke because 5V circuits cannot be controlled.
In addition, as long as one of the output Pins, 1, 3, 4, or 5, is open, inductance energy stored in the motor results in
electrical stress on the driver, possibly resulting in the emission of smoke.
Function Table
M2
0
0
1
1
M1
M3
0
1
0
1
CLOCK Edge Timing for
Phase Switching
1
2-phase excitation
selection
1-2-phase excitation
(IOH=100%)
W1-2 phase
excitation
2W1-2 phase
excitation
CLOCK rising edge
0
1-2 phase excitation
(IOH=100%, 71%)
W1-2 phase
excitation
2W1-2 phase
excitation
4W1-2 phase
excitation
CLOCK both edges
IOH=100% results in the Vref voltage setting, IOH.
During 1-2 phase excitation, the hybrid IC operates at a current setting of IOH=100% when the CLOCK signal rises.
Conversely, pseudo micro current control is performed to control current at IOH=100% or 71% at both edges of the
CLOCK signal.
CWB pin
Forward/CW
0
Reverse/CCW
1
ENABLE
• RESETB pin
ENABLE
Motor current cut: Low
RESETB
Active Low
IOH
0


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