STK672-080 View Datasheet(PDF) - SANYO -> Panasonic
Part Name
Description
View to exact match
STK672-080
SANYO -> Panasonic
STK672-080 Datasheet PDF : 17 Pages
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STK672-080
Functional Description
2W1-2 Phase Excitation Drive (microstepping operation)
VCC2=5V
VCC1=10V to 45V
VCC2=5V
6
184
194
142
A Two-phase stepping motor
5
AB
4
B
3
+
BB
2
ENABLE
15
SG
Vf ≈ 0.3V
CLK
11 STK672-080 1
PG
+
RESET 13
CBW
10
VCC2=5V
MoI
14
Simplified power-on reset circuit
(This circuit cannot be used to detect
drops in the power-supply voltage.)
RoX
7
Ro1
Vref
Ro2
Always perform a power-on reset operation when the VCC2 supply voltage is first applied to this hybrid IC.
A value of about 100 Ω is recommended for
RO2 to minimize the influence of the Vref
pin internal impedance, which is 6 kΩ.
ROX: The input impedance is 6 kΩ ±30%.
A13261
[Setting the Motor Current]
The motor current IOH is set by the Vref voltage on the hybrid IC pin 7. The following formula gives the relationship
between IOH and Vref.
ROX = (RO2 × 6 kΩ) ÷ (RO2 + 6 kΩ) ·············(1)
Vref = VCC2 × ROX ÷ (RO1 + ROX) ··············(2)
IOH =
—1 × —Vr—ef ·············································(3)
k RS
K: 4.7 (Voltage division ratio), Rs: 0.15 Ω (The hybrid IC’s internal current detection resistor (precision: ±3%)
Applications can use motor currents from the current (0.05 to 0.1 A) set by the duty of the frequency set by the oscillator
up to the limit of the allowable operating range, IOH = 2.8 A
0A
Motor current waveform
Ioave IOL IOH
A13262
[Function Table]
M2
M1
M3
1
0
0
0
2 phase excitation
1-2 phase excitation
0
1
1
1
0
1
1-2 phase excitation W1-2 phase excitation 2W1-2 phase excitation
W1-2 phase excitation 2W1-2 phase excitation 4W1-2 phase excitation
Phase switching clock edge timing
Rising edge only
Rising and falling edges
CWB
Forward
0
Reverse
1
ENABLE
RESET
Motor current is cut off when low
Active low
No. 6507-6/17
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