Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating
Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.
Allowable Operating Ranges
at Ta = 25°C
Parameter
Operating supply voltage 1
Operating supply voltage 2
Input voltage
Phase output current 1
Phase output current 2
Clock frequency
Symbol
VCC1
VCC2
VIH
IO1
IO2
fCL
Without heat sink
Tc = 105°C
Pin 11 input frequency
With signal
With signal
Conditions
Ratings
16 to 30
5.0V
±
5%
0 to VCC2
1.7
2.4
0 to 50
Unit
V
V
V
A
A
kHz
Electrical Characteristics 1
at Tc = 25°C, VCC1 = 24V, VCC2 = 5V
Parameters
VCC2 supply current
Effective output current
FET diode forward voltage
Output saturation voltage
Output leakage current
Input high voltage
Input low voltage
Input current
Vref input voltage
Vref input current
MOI output high voltage
MOI output low voltage
PWM frequency
Symbol
ICCO
Ioave
Vdf
Vsat
IOL
VIH
VIL
IIL
VrH
Ir
VOH
VOL
fc
Enable=Low
Each phase R/L=2Ω /6mH
2W2-3-phase excitation Vref = 0.61V
If= 1A (RL=23Ω)
RL = 23Ω
RL = 23Ω
9 terminals, Pins 11 to 18, 22
9 terminals, Pins 11 to 18, 22
Pins 11 to 18 pin = GND level
pull-up resistance 20kΩ (typ)
Pin 10
Pin 10, pin 10 = 2.5V
Pin 20, pin 20 to 19 = 820Ω
Pin 20, pin 21 to 20 = 1.6kΩ
63
115
0
440
2.5
0.4
625
250
4.0
1.0
550
VCC2/2
810
0.62
Conditions
min
Rating
typ
6.1
0.69
1.0
0.45
max
12
0.76
1.6
0.56
0.1
mA
Arms
V
V
mA
V
V
μA
V
μA
V
V
kHz
unit
Note: Constant voltage supply is used as power supply.
No.A1137-2/15
STK673-011-E
Electrical Characteristics 2
at Tc = 25°C, VCC1 = 24V, VCC2 = 5V
Current division ratio at phase current of 1/4 electrorotation, in each excitation mode (unit = %, typ.) Number of current
division is put in parentheses.
Current division
1/96
2/96
3/96
4/96
5/96
6/96
7/96
8/96
9/96
10/96
11/96
12/96
13/96
14/96
15/96
16/96
17/96
18/96
19/96
20/96
21/96
22/96
23/96
24/96
100
100
100
98
96
96
92
100
87
87
87
79
71
71
61
50
50
50
38
0
26
26
0
0
2 phase (1)
2-3 phase (3)
W2-3 phase (6)
2W2-3 phase (12)
0
13
Note: Constant voltage supply is used as power supply.
Electrical Characteristic 2 represents design values. Measurement for controlling the standard value is not
conducted.
Package Dimensions
unit:mm (typ)
64.0
8.5
1
2.0
27 2.0=54.0
0.4
2.9
5.0
28
0.5
0.5
32.0
No.A1137-3/15
STK673-011-E
Equivalent Block Diagram
Charging pump
GND2 9
VCC2(5V) 21
Clock
Mode A
Mode B
Mode C
TU
Hold
CW / CCW
Enable
Reset
MOI
11
12
13
18
22
14
15
16
17
20
F1, F2, F3 current detection
8 VCC1A
7 VZ
1 VCC1B
2 VCC1C
Time
chart
generation
F1, F2, F3
PWM
control
F1
F2
F3
4
23
6
24
5
25
F6
UO
UI
VO
VI
WO
WI
F4, F5, F6
PWM
control
F4
F5
Vref 10
Reference clock
CR oscillator
Step switching
of
ref. voltage
for
setting current
VCC side
level shift
GND side
level shift
F4, F5, F6 current detection
27 P. GNDA
28 P. GNDB
SUB
GND1 19
ITF00807
Sample Application Circuit
STK673-011-E
7
VCC2(5V)
Clock
Mode A
Mode B
Mode C
TU
Hold
CW / CCW
Enable
Reset
MOI
21
11
12
13
18
22
14
15
16
17
20
8
1
2
U
+
C2
2.2μF
VCC1
16 to 30V
4
23
6
24
V
3-phase stepping motor
R01
Vref
C4
10μF
+
R02
10
19
C3
0.1μF
5
25
9
27 28
W
+
C1
220μF
C5
0.01μF
P. GND
ITF00808
No.A1137-4/15
STK673-011-E
Set Equation of Output Current IO Peak Value
IO peak = Vref
÷
K K = 0.63 (V/A)
where
Vref
≤
0.5
×
VCC2
Vref = VCC2
×
Rox
÷
(R01 + Rox)
Rox = (R02
×
4.0kΩ)
÷
(R02 + 4.0kΩ)
•
R02 is preferably set to be 100Ω in order to minimize the effect of the internal impedance (4.0kΩ
±30%)
of
STK673-011-E
•
For noise reduction in 5V system, put the GND side of bypass capacitor (220μF) of VCC1 (shown in a thick line in
the above Sample Application Circuit) in the vicinity of pins 27 and 28 of the hybrid IC.
•
Set the capacitance value of the bypass capacitor C1 such that a ripple current of a capacitance, which varies in
accordance with the increase of motor current, lies in an allowable range.
•
K in the above-mentioned set equation varies within
±5
to
±10%
depending on the inductance L and resistance value
R of the used motor. Check the peak value setting of IO upon actual setting.
Input/Output Terminals Functions of 5V System
Terminal name
No.
Function
Basic clock for switching phase current of motor
Clock
11
Input frequency range: DC to 50kHz
Minimum pulse width: 10μs
High level duty: 40 to 60%
Mode A
Mode B
Mode C
12
13
18
22
14
15
16
17
20
10
Sets excitation mode
Sets excitation mode
Sets excitation mode
Sets excitation mode
TU
Hold
CW/CCW
Enable
Reset
MOI
Vref
Switches 2-3 phase excitation of step current to rectangular current
More effective in increasing torque than in lowering vibration of motor
Temporarily holds the motor in a state
Switches the rotational direction of the motor
Turns OFF all of the driving MOSFET
System reset Make sure to input a reset signal of 10μs or more
Monitors the number of revolution of the motor
Sets the peak value of the motor current set at 0.63V per 1A
0
1 = CW, 0 = CCW
0
0
Outputs 1 pulse of a high level signal per
one cycle of phase current
Maximum value 0.5
×
VCC2 (4A max)
See table listed below
See table listed below
See table listed below
See table listed below
Conditions upon Functioning
0 = Low, 1 = High
Rising edge in Mode C = 1
Rising and falling edge in Mode C = 0
Excitation Mode Table
Input condition
Excitation No.
Mode A
0
0
0
1
1
0
0
0
1
Mode B
0
1
1
0
1
0
0
1
0
Mode C
1
1
1
1
1
0
0
0
0
TU
1
1
0
1
1
1
0
1
1
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
2-phase
2-3-phase
2-3-phase TU
W2-3-phase
2W2-3-phase
2-3-phase
2-3-phase TU
W2-3-phase
2W2-3-phase
Excitation Mode
Number of current
steps
1
3
1
6
12
3
1
6
12
Number of clock pulse
per one cycle of
phase current
6
12
12
24
48
6
6
12
24
As shown in the table, TU terminal is only effective for Excitation Nos. (3) and (7).
Although the present hybrid IC is not damaged even when TU = 0 is mistakenly input in Excitation, other than
Excitation Nos. (3) and (7), motor vibration or motor current may increase.
* Timing charts for 3-phase stepping motor driver is illustrated on pages 9 to 13 for exemplary operations of Enable
Hold, CW/CCW for Excitation Nos. (1), (2), (3), (4), (5) and (9), and Excitation No. (4).
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