stk672-632b-e Sanyo Semiconductor Corporation, stk672-632b-e Datasheet - Page 21

• Manufacturer Part Number: stk672-632b-e
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

7. Example of Stepping Motor Driver Output Current Path (1-2 phase excitation)
RESETB
ENABLE
V DD =5V
FAULT1
MODE1
MODE2
CLOCK
I O A
CWB
CLOCK
Phase A output
current
Phase AB output
current
I O AB
Vref
N.C
S.G
10
11
17
12
13
14
15
16
19
18
9
Over heat
mode setting
detection
Power
counter
advnce
reset
Phase
Excitatin
FAULT1,
FAULT2
on
signal
circuit
Latch
circuit
circuit
Latch
Latch
V DD
V SS
When PWM operations of I O A
are OFF, for I O AB, negative
current flows through the
parasitic diode, F2.
generation
Vref/4.9
Amplifier
excitation
V SS
Phase
signal
PWM operations
Output open
Current control
Over current
FAULT2
detection
detection
chopper
circuit
8
STK672-632B-E
N.C
7
I O A
BI
AI
Vref
4
F1
A
I O AB
R1
5
F2
AB
2-phase stepping motor
3
F3
B
R2
When PWM operations of I O AB
are OFF, for I O A, negative
current flows through the
parasitic diode, F1.
1
F4
BB
2
6
P.G2
P.G1
C02
at least 100μF
V CC
24V
P.GND
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