參數(shù)資料
型號: TEA2028
廠商: 意法半導(dǎo)體
英文描述: APPLICATION NOTE
中文描述: 應(yīng)用筆記
文件頁數(shù): 44/47頁
文件大小: 532K
代理商: TEA2028
VIII.6.1.3 - ”S” Correction circuit in quasi-bridge configuration
The ”S” correction waveformis obtainedusing the
non-linear ”V
DIODE
” versus”I
DIODE
” characteristics
3
2
1
V
IN
R
R1
V-
C
A
R2
R3
V+
R’3
R’2
R’1
P2
V
P
V+
Frame Reference
Sawtooth
V
OUT
P1
R
M
Frame
Amplitude
Adjust
α
, R
M
. I
Y
V
B
I
Y
R
M
. I
Y
Frame
Yoke
2
Figure89
2
3
R1
R2
R
R3
R5
220
R4
2.2k
100
D2
D1
100
R
M
V
B
YOKE
TEA2029C
2
Figure90
of ”D1” and ”D2” diodes.
The signal pre-corrected by ”D1”, ”D2” diodesand
the feed-backsignal through ”R5”, aresummed at
”A”. The ”S” correction level is determined by the
ratiobetween ”R4” and ”R5” resistors.
VIII.6.2 - Frame scanning in switched mode
usingcoupling capacitor
(see Figure 91)
The parabolic voltage at (a) is integrated by ”R2,
C2” network and used for ”S” correction.
The ”S” waveform voltage at (b) is added to the
saw-toothvoltage at(c). The”S” levelisdetermined
by ”C2, R2, R3” network.
1
2
3
+V
B
27k
FRAME
SWATOOTH
150k
10k
R3
680k
R2
820k
Linearity
Adjustment
C2
0.1
μ
F
100
56k
Vertical
Amplitude
Adjust
10
C
P
(c)
(a)
(b)
To Safety
Input
R4
R5
TEA2029C
220k
YOKE
2
Figure91
TEA2028 - TEA2029APPLICATIONNOTE
44/46
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