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參數(shù)資料
| 型號(hào)： | 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(yè)數(shù)： | 8/14頁(yè) |
| 文件大?。?/td> | 320K |
| 代理商： | STV8172A |
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Application Hints
STV8172A
8/14
C
S
performs an integration of the parabolic signal on C
L
, therefore the amount of S correction is set
by the combination of C
L
and C
s
.
4.3
Application with Differential-output Drivers
Certain driver ICs provide the ramp signal in differential form, as two current sources i
+
and i
with
opposite variations.
Let us set some definitions:
●
i
cm
is the common-mode current:
●
at peak of signal, i
+
= i
cm
+ i
p
and i
= i
cm
- i
p
, therefore the peak differential signal is i
p
- (-
i
p
) = 2 i
p
, and the peak-peak differential signal, 4i
p
.
The application is described in
Figure 7
with DC yoke coupling. The calculations still rely on the fact
that V
1
remains equal to V
7
.
Figure 7: Using a Differential-output Driver
+Vs
R
2
R
1
Rd(*)
Yoke
Ly
-V
EE
0
(*)
recommended:
μ
s
50
Rd
μ
s
20
<
<
0.1μF
0.1μF
C
F
(47 to 100μF)
Power
Amplifier
Flyback
Generator
Thermal
Safety
+
-
470μF
470μF
Output
Current
Output
Voltage
I
p
7
3
2
5
6
1
4
R
7
+
-
Differential output
driver IC
i
p
i
cm
-i
p
i
cm
1.5
icm
1
i-
+
(
)
=
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