STK672-630A-E Sanyo Semicon Device, STK672-630A-E Datasheet - Page 20

• Manufacturer Part Number: STK672-630A-E
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semicon Device

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7. Example of Stepping Motor Driver Output Current Path (1-2 phase excitation)
V DD =5V
RESETB
ENABLE
MODE1
CLOCK
MODE2
FAULT
S.G
Vref
I O A
CWB
CLOCK
Phase A output
current
Phase AB output
current
I O AB
N.C
(Opendrain)
Over heat
detection
Power
FAULT
reset
signal
counter
advnce
Phase
mode setting
on
Excitatin
Latch
When PWM operations of I O A
are OFF, for I O AB, negative
current flows through the
parasitic diode, F2.
Latch
PWM operations
V DD
V SS
generation
excitation
Vref/4.9
Phase
signal
V SS
Chopper
STK672-630A-E
detection
current
circuit
Over
Amp
N.C
V
100kΩ
I O A
N.C
FAO
FAB
FBB
FBO
Vref
BI
AI
I O AB
A
F1
When PWM operations of I O AB
are OFF, for I O A, negative
current flows through the
parasitic diode, F1.
AB
F2
2-phase stepping motor
B
F3
F4
BB
P.G1
P.G2
No. A1129-20/21
+
at least 100μF
P.GND
C02
V CC
24V
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