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Epson LQ 1050 - B/W Dot-matrix Printer - Page 210

Epson LQ 1050 - B/W Dot-matrix Printer
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REV.-A
A.1.7
STK6722H
4-Phases Stepper Motor Driver
/%
T
The STK6722H is an
uni-polar
constant current chopper driver
IC
for the four phases stepper motor.
.
I
I
1 2 3456
-
- - - - - - 18
Figure A-1 5.
STK6722H
Pin Diagram
I
1
II
I
m
D1O
nls
,
Q,>
9Z
t4
Is
4
~
:
c
Q
J
I*
011
082
*I*
*I7
07
DO
~------
--=
------- --
~
.Jw_-
-
1;
1,
,,
~,
,,
n:
t
“4
;
8:
,/
, L -----
d
1-------
_l
L------
---
mm
I I
I
I
.
.-
f
.
.
.
.
Figure A-1 6.
STK6722H
Internal Circuit
A-24

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