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PDF STK672-220-E Data sheet ( Hoja de datos )
| Número de pieza | STK672-220-E | |
| Descripción | Two-Phase Stepping Motor Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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Ordering number : EN7465A
STK672-220-E
Thick-Film Hybrid IC
Unipolar Constant-Current Chopper
Two-Phase Stepping Motor Driver
Output Current 2.8A
http://onsemi.com
Overview
The STK672-220-E is two-phase stepping motor driver hybrid IC (HIC) that features further miniaturization and
improved input logic flexibility as compared to the STK6713 series products.
Applications
• The STK672-220-E is optimal for use as a stepping motor driver in printers, copiers, XY plotters, and similar
equipment.
Features
• Built-in common-mode input protection circuit.
• The input signal logic lines are provided as active-high and active-low pairs, and thus support switching the motor
wiring.
• Built-in current detection resistor for reduced external component mounting area on the printed circuit board.
• Inhibit pin (cuts off the motor current)
• Wide motor operating range (10 to 45V)
Semiconductor Components Industries, LLC, 2013
June, 2013
71608HKIM/61504TN (OT) No.7465-1/10
1 page  
STK672-220-E
Setting the Motor Current Peak Value (IOH)
IOH ≈ Vref ÷ Rs
Vref: STK672-220-E pin 12 input voltage
Rs: STK672-220-E internal current detection resistor (0.17Ω ±2%)
IOH
0
Model of the Motor Current Flowing into the Driver IC (pins 2, 3, 4, and 5)
Vref = (Ro2 ÷ (Ro1 + Ro2)) × VCC2
VCC2 = 5V
Current Switching Techniques
Due to the input bias current (IIB) specifications, Ro1 must be under 100kΩ.
The figures below present sample circuits that temporarily switch the motor current when, for example a held motor
stops.
We recommend using the circuit structure in the figure at the left to minimize as much as possible the effects of the
saturation voltage of the reference voltage switching transistor.
5V
5V
Ro1
Ro3 Ro2
Vref
Ro1
Ro3 Ro2
Vref
Switching Circuit 1
Switching Circuit 2
Input Pin Circuits
Input pin
Pin 6, 7, 8, and 9
X phase
(XB phase)
Pin 11
Pin 12
10kΩ
10kΩ
Circuit type
MOSFET gate signal
XB phase PWM signal
5V
To XB phase
5V
The 5V/GND switch shows how toff
time setting operates in the internal
block diagram on page 3. When
switched to GND, pull-down with an
input resistance of 20kΩ is formed.
Inhibit
10kΩ
10kΩ
GND
VCC2
CR input
Vref
To one of the comparator
GND
No.7465-5/10
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet STK672-220-E.PDF ] | |
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