|
|
PDF STK672-120-E Data sheet ( Hoja de datos )
| Número de pieza | STK672-120-E | |
| Descripción | Two-Phase Stepping Motor Driver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de STK672-120-E (archivo pdf) en la parte inferior de esta página. Total 9 Páginas | ||
|
No Preview Available !
Ordering number : EN6042A
STK672-120-E
Thick-Film Hybrid IC
Unipolar Fixed-Current Chopper (Self-Excited PWM)
Scheme and Built-in Phase Signal Distribution IC
Two-Phase Stepping Motor Driver
(Square Wave Drive) Output Current 2.4A
http://onsemi.com
Overview
The STK672-120-E is a unipolar fixed-current chopper type 2-phase stepping motor driver hybrid IC. It features power
MOSFETs in the output stage and a built-in phase signal distribution IC. The incorporation of a phase distribution IC
allows the STK672-120-E to control the speed of the motor based on the frequency of an external input clock signal.
It supports two types of excitation for motor control: 2-phase excitation and 1-2 phase excitation. It also provides a
function for switching the motor direction.
Applications
• Two-phase stepping motor drive in send/receive facsimile units
• Paper feed in copiers, industrial robots, and other applications that require 2-phase stepping motor drive
Features
• The motor speed can be controlled by the frequency of an external clock signal (the CLOCK pin signal).
• The excitation type is switched according to the state (low or high) of the MODE pin. The mode is set to 2-phase or 1-
2 phase excitation on the rising edge of the clock signal.
• A motor direction switching pin (the CWB pin) is provided.
• All inputs are schmitt inputs and 40kΩ (typical: –50 to +100%) pull-up resistors are built in.
• The motor current can be set by changing the Vref pin voltage. Since a 0.165Ω current detection resistor is built in, a
current of 1A is set for each 0.165V of applied voltage.
• The input frequency range for the clock signal used for motor speed control is 0 to 25kHz.
• Supply voltage ranges: VCC = 10 to 42V, VDD = 5.0V ±5%
• This IC supports motor operating currents of up to 2.4A at Tc = 105°C, and of up to 4.0A at Tc = 25°C.
Semiconductor Components Industries, LLC, 2013
June, 2013
61108HKIM/12299RM (OT) No.6042-1/9
1 page  
STK672-120-E
Input Pin Functions (CMOS input levels)
Pin Pin No.
Function
Input conditions when operating
CLOCK
9 Reference clock for motor phase current switching
Operates on the rising edge of the signal
MODE
8 Excitation mode selection
Low: 2-phase excitation
High: 1-2 phase excitation
CWB
7 Motor direction switching
Low: CW (forward)
High: CCW (reverse)
RESETB
6 System reset and A, AB, B, and BB outputs cutoff.
A reset is applied by a low level
Applications must apply a reset signal for at least 20μs when power is
first applied.
• A simple reset function is formed from D1, CO4, and RO3 in this application circuit. With the CLOCK input held low,
when the 5V supply voltage is brought up a reset is applied if the motor output phases A and BB are driven.
If the 5V supply voltage rise time is slow (over 50ms), the motor output phases A and BB may not be driven. Increase
the value of the capacitor CO4 and check circuit operation again.
• See the timing chart for the concrete details on circuit operation.
Usage Notes
• 5V system input pins
[RESETB and CLOCK (Input signal timing when power is first applied)]
As shown in the timing chart, a RESETB signal input is required by the driver to operate with the timing in which the
F1 gate is turned on first. The RESETB signal timing must be set up to have a width of at least 20μs, as shown below.
The capacitor CO4 and the resistor RO3 in the application circuit form simple reset circuit that uses the RC time
constant rising time. However, when designing the RESETB input based on CMOS levels, the application must have
the timing shown in figure 1.
Rise of the 5V supply voltage
RESETB signal input
CLOCK signal
At least 20μs
At least 10μs
Figure 1 RESETB and CLOCK Signals Input Timing
See the timing chart for details on the CLOCK, MODE, CWB, and other input pins.
[Vref <Motor current peak value setting>]
In the sample application circuit, the peak value of the motor current (IOH) is set by RO1, RO2, and VDD (5V) as
described by the formula below.
IOH
0
Figure 2 Motor Current IO Flowing into the Driver IC
IOH = Vref ÷ Rs Here, Rs is hybrid IC internal current detection resistor
Vref = (R02 ÷ (R01 + R02)) × 5V
STK672-120-E: Rs = 0.165Ω
No.6042-5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet STK672-120-E.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| STK672-120-E | Two-Phase Stepping Motor Driver | ON Semiconductor |
| STK672-120-SL-E | 2-phase Stepping Motor Driver | ON Semiconductor |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |