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STK672-050 bảng dữ liệu(PDF) 4 Page - Sanyo Semicon Device

tên linh kiện STK672-050
Giải thích chi tiết về linh kiện  Microstep Operation-Supported 4-Phase Stepping Motor Driver (Io= 1.5A)
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STK672-040
No. 5227—4/11
Motor Current Calculation
The motor current IOH is determined by the reference volt-
age on pin 8 (Vref). The relationship between IOH and
Vref is given by the following equation.
where Rs is the built-in current detection resistance
(0.33
Ω ± 3%).
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 IOH = 1.5A.
Function Tables
I
OH
1
3
---
Vref Rs
×
=
Motor current waveform
M1
M2
M3
Excitation
Phase switching CLK edge timing
0
0
0
Phase 1-2
Rising and falling edge
0
1
0
Phase 2W1-2
1
0
0
Phase W1-2
1
1
0
Phase 4W1-2
0
0
1
Phase 2
Rising edge only
0
1
1
Phase W1-2
1
0
1
Phase 1-2
1
1
1
Phase 2W1-2
CWB
Direction
0
Forward
1
Reverse
Input
Active level
ENABLE
Low
RESET
Low
Mo1
Mo2
Output
00
A
01
B
10
A
11
B


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