STK672-432A-E Sanyo Semicon Device, STK672-432A-E Datasheet - Page 7

• Manufacturer Part Number: STK672-432A-E
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semicon Device

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• Motor current peak value I OH 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
V CC ON (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
I OH =100% results in the Vref voltage setting, I OH .
During 1-2 phase excitation, the hybrid IC operates at a current setting of I OH =100% when the CLOCK signal rises.
Conversely, pseudo micro current control is performed to control current at I OH =100% or 71% at both edges of the
CLOCK signal.
CWB pin
ENABLE • RESETB pin
M3
Reverse/CCW
Forward/CW
M2
1
0
ENABLE
RESETB
M1
1-2 phase excitation
2-phase excitation
(I OH =100%, 71%)
selection
I OH
0
0
0
Motor current cut: Low
Active Low
0
1
1-2-phase excitation
(I OH =100%)
W1-2 phase
excitation
0
1
STK672-432A-E
2W1-2 phase
W1-2 phase
excitation
excitation
1
0
2W1-2 phase
4W1-2 phase
excitation
excitation
1
1
CLOCK Edge Timing for
CLOCK rising edge
CLOCK both edges
Phase Switching
No.A1586-7/21
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