Daewoo DDT-21H9ZZF, Service Manual, Page: 30 / 83

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Service Manual CP-099F
4-5 TDA835xJ Vertical Amplifier
The TDA835xJ are power circuit for use in 90
o
and 110
o
colour deflection systems for field frequencies
of 25 to 200Hz and 16/9 picture tubes. The circuit provides a DC driven vertical deflection output circuit,
operating as a highly efficient class G system. Due to the full bridge output circuit the deflection coils can
be DC coupled.
The IC is constructed in a Low Voltage DMOS process that combines Bipolar, CMOS and DMOS devices.
MOS transistors are used in the output stage because of the absence of second breakdown.
4-5-1 TDA8358J
An East-West output stage is provided that is able to sink current
from the diode modulator circuit.
Features :
- Few external components
- Highly efficient fully DC-coupled vertical output bridge circuit
- Short rise and fall time of the vertical flyback switch
- Guard circuit
- Temperature (thermal) protection
- High EMC because of common mode inputs
- East-West output stage
1
2
3
4
5
6
7
8
9
10
11
12
13
i(pos)
i(neg)
p
oB
iEW
V
EW
oEW
flb
oA
o(guard
M
comp
V
TDA8358J
V
V
V
V
GND
GND
V
V
V
V
V
I
9
V fib
V p
3 11
13
V o(guard) I comp
comp
1
V i(pos)
2
V i(neg)
+V i(diff)
V i(sb)
-V i(diff)
+V i(diff)
V i(sb)
-V i(diff)
I
iEW(top)
I
iEW(bot)
guard
GNDv
GND
EW
6
7
7
8
4
12
10
V
V
V
V
oEW
oB
M
oA
M6
M3
M1
M4
M2
D3
M5
D2
D1
input/
feedback