stk672-640b-e Sanyo Semiconductor Corporation, stk672-640b-e Datasheet - Page 6

• Manufacturer Part Number: stk672-640b-e
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

[Smoke Emission Precuations]
Input Pin Functions
Output Pin Functions
Note: See the timing chart for the concrete details on circuit operation.
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 STK672-632B-E, 632A-E, 630A-E, STK672-642B-E, 640B-E, 640A-E to emit smoke
because 5V circuits cannot be controlled.
CLOCK
MODE1
MODE2
CWB
RESETB
ENABLE
FAULT1
FAULT2
Pin Name
Pin Name
Pin No.
Pin No.
12
10
17
13
14
15
16
8
Reference clock for motor phase current switching
Excitation mode selection
Motor direction switching
System reset
Initial state of A and BB phase excitation in the timing
charts is set by switching from low to high.
The A, AB, B, and BB outputs are turned off, and after
operation is restored by returning the ENABLE pin to the
high level, operation continues with the same excitation
timing as before the low-level input.
Monitor pin when any of motor terminal open, overcurrent,
or overheat is detected.
The output voltage of this pin differs according to the
detected abnormality.
Function
Function
STK672-640B-E
Operates on the rising edge of the signal (MODE2=H)
Low: 2-phase excitation
High: 1-2 phase excitation
High: Rising edge
Low: Rising and falling edge
Low: CW (forward)
High: CCW (reverse)
A reset is applied by a low level
The A, AB, B, and BB outputs are turned off by a low-
level input.
Low level is output when detected.
3 levels output
Input Conditions When Operating
Input Conditions When Operating
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