tda8359j-n2 NXP Semiconductors, tda8359j-n2 Datasheet - Page 10

• Manufacturer Part Number: tda8359j-n2
• Description: Full Bridge Vertical Deflection Output Circuit In Lvdmos
• Manufacturer: NXP Semiconductors

Philips Semiconductors
R
Most Philips brand TV signal processors have outputs in
the form of current. This current has to be converted to a
voltage by using resistors at the input of the TDA8359J
(R
resistors can be calculated by:
For calculating the measuring resistor R
differential input voltage (V
be measured between pins INA and INB (see Fig.5). The
calculation for R
E
Measured or given values: I
290 A.
The differential input voltage will be:
2002 Jan 21
V
V
R
handbook, halfpage
XAMPLE
M
i dif p p
i dif p p
CV1
Full bridge vertical deflection output circuit
in LVDMOS
M
calculation
=
and R
V
--------------------------- -
–
–
i dif p p
I
o p p
PROCESSOR
=
=
CV2
TV SIGNAL
–
I
290 A 2.2k
i1 p p
–
). The differential voltage across these
M
I I(bias)
I I(bias)
is:
–
Fig.5 Input Circuit
0
0
R
I i1(p-p)
I i2(p-p)
CV1
i(dif)(p-p)
I(bias)
2.2 nF
2.2 nF
–
C7
C6
–
I –
= 400 A; I
–
). This voltage can also
i2 p p
290 A
2.2 k
2.2 k
R CV1
R CV2
–
M
INA
INB
MBL366
, use the
i1(p-p)
2.2k
R
1
2
CV2
= I
i2(p-p)
=
1.27V
=
10
Supply voltage calculation
For calculating the minimum required supply voltage,
several specific application parameter values have to be
known. These parameters are the required maximum
(peak) deflection coil current I
R
required maximum (peak) deflection coil current should
also include overscan.
The deflection coil resistance has to be multiplied by 1.2 in
order to take account of hot conditions.
Chapter “Characteristics” supplies values for voltage
losses of the vertical output stage. For the first part of the
scan, the voltage loss is given by V
part of the scan, the voltage loss is given by V
The voltage drop across the deflection coil during scan is
determined by the coil impedance. For the first part of the
scan the inductive contribution and the ohmic contribution
to the total coil voltage drop are of opposite sign, while for
the second part of the scan the inductive part and the
ohmic part have the same sign.
For the vertical frequency the maximum frequency
occurring must be applied to the calculations.
The required power supply voltage V
the scan is given by:
The required power supply voltage V
of the scan is given by:
The minimum required supply voltage V
highest of the two values V
voltage and component values also has to be taken into
account.
V
V
–
+
coil
P 1
P 2
L
L
coil
coil
and L
=
=
I
I
coil peak
2I
2I
coil peak
coil
coil peak
coil peak
, and the measuring resistance of R
R
R
f
f
coil
vert max
vert max
coil
+
P(1)
+
R
R
M
coil(peak)
M
and V
+
+
V
V
loss 1
loss(1)
loss 2
P(2)
P
Product specification
P
, the coil impedance
for the second part
for the first part of
TDA8359J
. Spread in supply
P
. For the second
shall be the
loss(2)
M
. The
.