STK672-040 Sanyo Semicon Device, STK672-040 Datasheet - Page 4

• Manufacturer Part Number: STK672-040
• Description: Microstep Operation-Supported 4-Phase Stepping Motor Driver (Io= 1.5A)
• Manufacturer: Sanyo Semicon Device

Motor Current Calculation
The motor current I
age on pin 8 (Vref). The relationship between I
Vref is given by the following equation.
Function Tables
I
OH
M1
0
0
1
1
0
0
1
1
=
M2
0
1
0
1
0
1
0
1
1
-- -
3
Vref Rs
M3
CWB
0
0
0
0
1
1
1
1
0
1
Phase 2W1-2
Phase 4W1-2
Phase 2W1-2
Phase W1-2
Phase W1-2
Excitation
Phase 1-2
Phase 1-2
Phase 2
OH
is determined by the reference volt-
Phase switching CLK edge timing
Rising and falling edge
Rising edge only
Direction
Reverse
Forward
OH
Motor current waveform
STK672-040
and
where Rs is the built-in current detection resistance
(0.33
The motor current ranges from the current due to the fre-
quency duty set by the oscillator (0.05 to 0.1A) to the
allowable operating range maximum of I
Mo1
0
0
1
1
3%).
ENABLE
RESET
Input
Mo2
0
1
0
1
Active level
OH
Low
Low
= 1.5A.
No. 5227—4/11
Output
A
B
A
B