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參數(shù)資料
| 型號： | STV8172A |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | Vertical Deflection Booster for 3-APPTV/Monitor Applications with 70-V Flyback Generator |
| 中文描述： | 垂直偏轉(zhuǎn)助推器與70 - V反激式發(fā)電機(jī)3-APPTV/Monitor應(yīng)用 |
| 文件頁數(shù)： | 7/14頁 |
| 文件大小： | 320K |
| 代理商： | STV8172A |
7/14
STV8172A
Application Hints
4.2
AC-Coupled Applications
In AC-coupled applications (See
Figure 6
), only one supply (V
S
) is needed. The vertical position of
the scanning cannot be adjusted with input bias (for that purpose, usually some current is injected
or sunk with a resistor in the low side of the yoke).
4.2.1
Application Hints
Gain is defined as in the previous case:
Choose R
1
then either R
2
or R
3
. For good output centering, V
7
must fulfill the following equation:
–
R4
or
Figure 6: AC-coupled Application
R
3
+Vs
R
2
R
1
Rd(*)
Yoke
Ly
(*)
recommended:
50
μ
s
--Ly
Rd
20
μ
s
--Ly
<
<
0.1μF
C
F
(47 to 100μF)
Power
Amplifier
Flyback
Generator
Thermal
Safety
470μF
Output
Current
Output
Voltage
I
p
7
3
2
5
6
1
4
V
M
V
m
+
-
C
s
R
4
C
L
R
5
0
1.5
Ip
-----------------------
–
---------------------
×
=
VS
-2
V7
R5
+
V7
-----------------------2
VM
Vm
+
–
R3
R2
V7
+
=
V7
R3
-1
R2
--1
+
×
+
R4
R5
--------1
2 R4
R5
+
)
----------VS
2
Vm
R3
+
×
VM
+
=
+
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