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PDF STK673-011-E Data sheet ( Hoja de datos )
| Número de pieza | STK673-011-E | |
| Descripción | 3-Phase Stepping Motor Driver | |
| Fabricantes | ON Semiconductor | |
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Ordering number : ENA1137B
STK673-011-E
Thick-Film Hybrid IC
3-Phase Stepping Motor Driver
http://onsemi.com
Overview
The STK673-011-E is a 3-phase stepping motor driver hybrid IC with built-in microstep controller having a bipolar
constant current PWM system, in which a power MOSFET is employed at an output stage.
It includes a 3-phase distributed controller for a 3-phase stepping motor to realize a simple configuration of the motor
driver circuit.
The number of motor revolution can be controlled by the frequency of external clock input. 2, 2-3, W2-3 and 2W2-3-
phase excitation modes are available. The basic step angle of the stepping motor can be separated as much as one-eighth
2-3-phase to 2W2-3-phase excitation mode control quasi-sine wave current, thereby realizing low vibration and low
noise.
Applications
• As a 3-phase stepping motor driver for transmission and reception in a facsimile.
• As a 3-phase stepping motor driver for feeding paper feed or for an optical system in a copying machine.
• Industrial machines or products employing 3-phase stepping motor driving.
Features
• Number of motor revolution can be controlled by the frequency of external clock input.
• 4 types of modes, i.e., 2, 2-3, W2-3 and 2W2-3-phase excitations, are available which can be selected based on rising
of clock signals, by switching highs and lows of Mode A and Mode B terminals.
• Setting a Mode C terminal low allows an excitation mode that is based on rising and falling of a clock signal.
By setting the Mode C terminal low, phases that are set only by Mode A and Mode B can be changed to other phases
as follows without changing the number of motor revolution: 2-phase may be switched to 2-3-phase; 2-3-phase may
be switched to W2-3-phase; and W2-3-phase may be switched to 2W2-3-phase.
• Phase is maintained even when the excitation mode is changed.
• An MOI output terminal which outputs 1 pulse per 1 cycle of phase current.
• A CW/CCW terminal which switches the rotational direction.
• A Hold terminal which temporarily holds the motor in a state where the phase current is conducted.
• An Enable terminal which can forcibly turns OFF a MOSFET of a 6 output driving element in normal operation.
• Schmitt inputs with built-in pull-up resistor (20kΩ typ)
• Motor current can be set by changing the voltage of the Vref terminal (0.63V per 1A, dealing as much as 0 to
1/2VCC2 (4A)).
• The clock input for controlling the number of motor revolution lies in a range of 0 to 50kHz.
• Supply voltage: VCC1 = 16 to 30V, VCC2 = 5.0V ±5%
• A built-in current detection resistor (0.227Ω)
• A motor current during revolution can deal with as high as 2.4A at Tc = 105°C and as high as 4A at Tc = 50°C or
lower.
Semiconductor Components Industries, LLC, 2013
June, 2013
62911HKPC 5-7063/42011HKIM/71608HKIM No.A1137-1/15
1 page  
STK673-011-E
Set Equation of Output Current IO Peak Value
where
IO peak = Vref ÷ K K = 0.63 (V/A)
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
Clock
Mode A
Mode B
Mode C
TU
Hold
CW/CCW
Enable
Reset
MOI
Vref
No. Function
Basic clock for switching phase current of motor
Input frequency range: DC to 50kHz
11
Minimum pulse width: 10μs
High level duty: 40 to 60%
12 Sets excitation mode
13 Sets excitation mode
18 Sets excitation mode
Sets excitation mode
22 Switches 2-3 phase excitation of step current to rectangular current
More effective in increasing torque than in lowering vibration of motor
14 Temporarily holds the motor in a state
15 Switches the rotational direction of the motor
16 Turns OFF all of the driving MOSFET
17 System reset Make sure to input a reset signal of 10μs or more
20 Monitors the number of revolution of the motor
10 Sets the peak value of the motor current set at 0.63V per 1A
Conditions upon Functioning
0 = Low, 1 = High
Rising edge in Mode C = 1
Rising and falling edge in Mode C = 0
See table listed below
See table listed below
See table listed below
See table listed below
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)
Excitation Mode Table
Input condition
Mode A Mode B Mode C
001
011
011
101
111
000
000
010
100
TU
1
1
0
1
1
1
0
1
1
Excitation No.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
Excitation Mode
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
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).
No.A1137-5/15
5 Page 
2W2-3 phase excitation
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
W2-3 phase excitation (Enable operation)
Mode A
Mode B
Reset
Enable
Hold
Mode C
CW / CCW
Clock
MOI
U phase
excitation
0
V phase
excitation
0
W phase
excitation
0
TU
STK673-011-E
ITF00816
ITF00817
No.A1137-11/15
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet STK673-011-E.PDF ] | |
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