STK672-740B-E Datasheet, PDF (20/23 Pages) Sanyo Semicon Device – Thick-Film Hybrid IC 2-phase Stepping Motor Driver

STK672-740B-E
7. Example of Stepping Motor Driver Output Current Path (1-2 phase excitation)
2-phase stepping motor
IOA IOAB
VDD=5V 9
BBIN
φBB 10
N.C 11 BIN
φAB 17
φB 12
ABIN
φA 13
AIN
RESETB 14
ENABLE 15
Power
on
reset
FAULT1 16
FAULT1
FAULT2
signal
N.C 18
Vref 19
Over heat
detection
VDD
FAULT2 N.C
8
4
A
AB B
BB
5
7
3
1
F1 F2 F3 F4
FAO
FAB
FBO
FBB
R1
Latch
circuit
Over current
detection
Latch
circuit
Output open
detection
AI
Current control
chopper circuit
BI
Vref/4.9
Latch
circuit
Vref
Amplifier
VSS
VSS
R2
P.G2
2
P.G1
6
φA(Pin 13)
φAB(Pin 17)
VCC
24V
C02
at least 100μF
P.GND
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.
No. A1932-20/23