STK672-612B-E Datasheet, PDF (23/26 Pages) Sanyo Semicon Device – Thick-Film Hybrid IC 2-phase Stepping Motor Driver

STK672-612B-E
7. Example of Stepping Motor Driver Output Current Path (1-2 phase excitation)
2-phase stepping motor
IOA IOAB
VDD=5V 9
MODE1 10
N.C 11
MODE2 17
CLOCK 12
CWB 13
RESETB 14
ENABLE 15
FAULT1 16
N.C 18
Vref 19
Excitatin
mode setting
Phase
advnce
counter
FAULT2 VrefOP A
AB
87
4
5
VDD
F1 F2
FAO
Phase
excitation
FAB
signal
FBO
generation
FBB
Power
on
reset
FAULT1,
FAULT2
signal
Latch
Latch
Opened
motor pin
detection
Over
current
detection
Chopper
circuit
Vref/4.9
R1
AI
BI
Over heat
detection
Latch
Amp
Vref
VSS
VSS
B
BB
3
1
F3 F4
R2
P.G2
2
P.G1
6
VCC
24V
C02
at least 100μF
P.GND
CLOCK
Phase A output
current
IOA
Phase AB output
current
IOAB
PWM operations
When PWM operations of IOA
are OFF, for IOAB, negative
current flows through the
parasitic diode, F2.
When PWM operations of IOAB
are OFF, for IOA, negative
current flows through the
parasitic diode, F1.
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