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Número de pieza TDA8358J
Descripción Full bridge vertical deflection output circuit in LVDMOS with east-west amplifier
Fabricantes NXP Semiconductors 
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INTEGRATED CIRCUITS
DATA SHEET
TDA8358J
Full bridge vertical deflection output
circuit in LVDMOS with east-west
amplifier
Product specification
File under Integrated Circuits, IC02
1999 Dec 22

1 page




TDA8358J pdf
Philips Semiconductors
Full bridge vertical deflection output circuit
in LVDMOS with east-west amplifier
Product specification
TDA8358J
Guard circuit
A guard circuit with output pin GUARD is provided.
The guard circuit generates a HIGH-level during the
flyback period. The guard circuit is also activated for one
of the following conditions:
During thermal protection (Tj 170 °C)
During an open-loop condition.
The guard signal can be used for blanking the picture tube
and signalling fault conditions. The vertical
synchronization pulses of the guard signal can be used by
an On Screen Display (OSD) microcontroller.
Damping resistor compensation
HF loop stability is achieved by connecting a damping
resistor RD1 (see Fig.4) across the deflection coil.
The current values in RD1 during scan and flyback are
significantly different. Both the resistor current and the
deflection coil current flow into measuring resistor RM,
resulting in a too low deflection coil current at the start of
the scan.
The difference in the damping resistor current values
during scan and flyback have to be externally
compensated in order to achieve a short settling time.
For that purpose a compensation resistor RCMP is
connected between pins OUTA and COMP. The value of
RCMP is calculated by:
RCMP = -((--V-V---F-F--B-B--------V-V----ll-o-o--s-s-s-s--(-(-F-F--B-B--)-)-------V-I-c--P-o--)-i-l--(×-p---e-R--a--D-k---)1---×-×---R--(--R-c---o-S-i--l-)+----×-3----0R---0-M---)
where:
Rcoil is the coil resistance
Vloss(FB) is the voltage loss between pins VFB and OUTA
at flyback.
East-west amplifier
The east-west amplifier is a current driver sinking the
current of a diode modulator circuit. A feedback
resistor REWF (see Fig.4) has to be connected between
the input and output of the inverting east-west amplifier in
order to convert the east-west correction input current into
an output voltage. The output voltage of the east-west
circuit at pin OUTEW is given by:
Vo Ii × REWF + Vi
The maximum output voltage is Vo(max) = 68 V, while the
maximum output current of the circuit is Io(max) = 750 mA.
1999 Dec 22
5

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TDA8358J arduino
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RGRD
5.6 k
COMP
GUARD VP
13 11 3
VI(bias)
Vi(p-p)
COMP.
CIRCUIT
GUARD
CIRCUIT
0
DEFLECTION
CONTROLLER
C6
2.2 nF
INA 1
RCV1
2.2 k
(1%)
C7
2.2 nF
INB 2
RCV2
2.2 k
(1%)
INPUT
AND
FEEDBACK
CIRCUIT
M2
D1
M4
M1
2.7 µH(3)
RFB
VP = 14 V
VFB
10
Vfb = 30 V
9
C3 C1 C4
C2
100
47 µF 100 nF
220 µF
nF (100 V)
(25 V)
M5
D3
D2
RCMP
820 k
D1(2)
10 OUTA
12 FEEDB
RS
2.7 k
RD1
270
deflection
coil
5 mH
6
(W66ESF)
RM
0.5
CD(1)
47 nF
RD2(1)
22
4 OUTB
VI(bias)
0
Vi(p-p)
II(av)
0
Ii(p-p)
INEW 5
Ii
M3
TDA8358J
REWF
82 k
6
VGND
M6 8 OUTEW
7
EWGND
REWL
12
to line output
transformer
MGL874
Deflection circuit: fvert = 50 Hz; tFB = 640 µs; II(bias) = 400 µA; Ii(dif)(peak) = 290 µA; Io(p-p) = 2.4 A.
East-west amplifier: Ii(B) = 290 µA; Ii(T) = 510 µA.
(1) Optional, component values depend on the deflection coil impedance.
(2) Extended flash over protection; BYD33D or equivalent.
(3) Optional, extended flash over protection.
Fig.4 Application diagram.

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