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STK672-432AN-E Fiches technique(PDF) 6 Page - ON Semiconductor

No de pièce STK672-432AN-E
Description  2-phase Stepper Motor Driver
Download  26 Pages
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Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

STK672-432AN-E Fiches technique(HTML) 6 Page - ON Semiconductor

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STK672-432AN-E
No.A2295-6/26
Sample Application Circuit
(2W1-2 Phase Excitation Drive /micro stepping operation)
Precautions
[GND wiring]
To reduce noise on the 5V/24V system, be sure to place the GND of C01 in the circuit given above as close as possible
to Pin 2 and Pin 6 of the hybrid IC.
In addition, in order to set the current accurately, the GND side of RO2 of Vref must be connected to the shared ground
terminal used by the Pin 18 (S.G) GND, P.G1 and P.G2.
[Input pins]
If VDD is being applied, use care that each input pin does not apply a negative voltage less than -0.3V to S. GND,
Pin 18. Measures must also be taken so that a voltage equal to or greater than VDD is not input.
High voltage input other than VDD, MOI, FAULT1, and FAULT2 is 2.5V.
Pull-up resistors are not connected to input pins. Pull-down resistors are attached. When controlling the input to the
hybrid IC with the open collector type, be sure to connect a pull-up resistor (1 to 20k
).
Be sure to use a device (0.8V or less, low level, when IOL=5mA) for the open collector driver at this time that has an
output voltage specification such that voltage is pulled to less than 0.8V at low level.
When using the power on reset function built into the hybrid IC, be sure to directly connect Pin 14 to VDD.
We recommend attaching a 1,000pF capacitor to each input to prevent malfunction during high-impedance input. Be
sure to connect the capacitor near the hybrid IC, between Pin 18 (S, G).
When input is fixed low, directly connect to Pin 18. When input is fixed high, directly connect to VDD.
[Current setting Vref]
Considering the specifications for the Vref input bias current IIB, we recommend a value 1k
 or less for R02.
If the motor current is temporarily reduced, the circuit given below is recommended.
The variable voltage range of Vref input is 0.14 to 1.48V.
STK672
-43xAN-E
+
9
12
15
10
13
7
14
19
18
6
2
5
4
1
3
VDD
5V
CLOCK
ENABLE
CWB
MOI
RESETB
FAULT1
A
AB
B
BB
Vref
R01
S.GND
R02
P.G1
P.G2
P.GND
C01
100μ
2-phase stepper motor
16
8
FAULT2
11
17
+
C02
10μ
Vcc=24V


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