STK672-442B-E Datasheet, PDF (7/26 Pages) Sanyo Semicon Device – Thick-Film Hybrid IC 2-phase Stepping Motor Driver

• Motor current peak value IOH setting
IOH
STK672-442B-E
0
[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), causing the STK672-442B-E to emit smoke because 5V circuits cannot be controlled.
Function Table
M2
0
0
1
1
CLOCK Edge Timing for
M1
0
1
0
1
Phase Switching
M3
2-phase excitation
1-2-phase excitation
W1-2 phase
2W1-2 phase
1
CLOCK rising edge
selection
(IOH=100%)
excitation
excitation
1-2 phase excitation
W1-2 phase
2W1-2 phase
4W1-2 phase
0
CLOCK both edges
(IOH=100%, 71%)
excitation
excitation
excitation
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
RESETB
Motor current cut: Low
Active Low
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