stk672-442b-e Sanyo Semiconductor Corporation, stk672-442b-e Datasheet - Page 7

• Manufacturer Part Number: stk672-442b-e
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

• 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), causing the STK672-442B-E to emit smoke because 5V circuits cannot be controlled.
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
STK672-442B-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
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